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binutils-gdb/gdb/configure.ac
Simon Marchi 18b4d0736b gdb: initial support for ROCm platform (AMDGPU) debugging 
This patch adds the foundation for GDB to be able to debug programs
offloaded to AMD GPUs using the AMD ROCm platform [1].  The latest
public release of the ROCm release at the time of writing is 5.4, so
this is what this patch targets.

The ROCm platform allows host programs to schedule bits of code for
execution on GPUs or similar accelerators.  The programs running on GPUs
are typically referred to as `kernels` (not related to operating system
kernels).

Programs offloaded with the AMD ROCm platform can be written in the HIP
language [2], OpenCL and OpenMP, but we're going to focus on HIP here.
The HIP language consists of a C++ Runtime API and kernel language.
Here's an example of a very simple HIP program:

    #include "hip/hip_runtime.h"
    #include <cassert>

    __global__ void
    do_an_addition (int a, int b, int *out)
    {
      *out = a + b;
    }

    int
    main ()
    {
      int *result_ptr, result;

      /* Allocate memory for the device to write the result to.  */
      hipError_t error = hipMalloc (&result_ptr, sizeof (int));
      assert (error == hipSuccess);

      /* Run `do_an_addition` on one workgroup containing one work item.  */
      do_an_addition<<<dim3(1), dim3(1), 0, 0>>> (1, 2, result_ptr);

      /* Copy result from device to host.  Note that this acts as a synchronization
         point, waiting for the kernel dispatch to complete.  */
      error = hipMemcpyDtoH (&result, result_ptr, sizeof (int));
      assert (error == hipSuccess);

      printf ("result is %d\n", result);
      assert (result == 3);

      return 0;
    }

This program can be compiled with:

    $ hipcc simple.cpp -g -O0 -o simple

... where `hipcc` is the HIP compiler, shipped with ROCm releases.  This
generates an ELF binary for the host architecture, containing another
ELF binary with the device code.  The ELF for the device can be
inspected with:

    $ roc-obj-ls simple
    1       host-x86_64-unknown-linux                                           file://simple#offset=8192&size=0
    1       hipv4-amdgcn-amd-amdhsa--gfx906                                     file://simple#offset=8192&size=34216
    $ roc-obj-extract 'file://simple#offset=8192&size=34216'
    $ file simple-offset8192-size34216.co
    simple-offset8192-size34216.co: ELF 64-bit LSB shared object, *unknown arch 0xe0* version 1, dynamically linked, with debug_info, not stripped
                                                                                 ^
                       amcgcn architecture that my `file` doesn't know about ----´

Running the program gives the very unimpressive result:

    $ ./simple
    result is 3

While running, this host program has copied the device program into the
GPU's memory and spawned an execution thread on it.  The goal of this
GDB port is to let the user debug host threads and these GPU threads
simultaneously.  Here's a sample session using a GDB with this patch
applied:

    $ ./gdb -q -nx --data-directory=data-directory ./simple
    Reading symbols from ./simple...
    (gdb) break do_an_addition
    Function "do_an_addition" not defined.
    Make breakpoint pending on future shared library load? (y or [n]) y
    Breakpoint 1 (do_an_addition) pending.
    (gdb) r
    Starting program: /home/smarchi/build/binutils-gdb-amdgpu/gdb/simple
    [Thread debugging using libthread_db enabled]
    Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
    [New Thread 0x7ffff5db7640 (LWP 1082911)]
    [New Thread 0x7ffef53ff640 (LWP 1082913)]
    [Thread 0x7ffef53ff640 (LWP 1082913) exited]
    [New Thread 0x7ffdecb53640 (LWP 1083185)]
    [New Thread 0x7ffff54bf640 (LWP 1083186)]
    [Thread 0x7ffdecb53640 (LWP 1083185) exited]
    [Switching to AMDGPU Wave 2:2:1:1 (0,0,0)/0]

    Thread 6 hit Breakpoint 1, do_an_addition (a=<error reading variable: DWARF-2 expression error: `DW_OP_regx' operations must be used either alone or in conjunction with DW_OP_piece or DW_OP_bit_piece.>,
        b=<error reading variable: DWARF-2 expression error: `DW_OP_regx' operations must be used either alone or in conjunction with DW_OP_piece or DW_OP_bit_piece.>,
        out=<error reading variable: DWARF-2 expression error: `DW_OP_regx' operations must be used either alone or in conjunction with DW_OP_piece or DW_OP_bit_piece.>) at simple.cpp:24
    24        *out = a + b;
    (gdb) info inferiors
      Num  Description       Connection           Executable
    * 1    process 1082907   1 (native)           /home/smarchi/build/binutils-gdb-amdgpu/gdb/simple
    (gdb) info threads
      Id   Target Id                                    Frame
      1    Thread 0x7ffff5dc9240 (LWP 1082907) "simple" 0x00007ffff5e9410b in ?? () from /opt/rocm-5.4.0/lib/libhsa-runtime64.so.1
      2    Thread 0x7ffff5db7640 (LWP 1082911) "simple" __GI___ioctl (fd=3, request=3222817548) at ../sysdeps/unix/sysv/linux/ioctl.c:36
      5    Thread 0x7ffff54bf640 (LWP 1083186) "simple" __GI___ioctl (fd=3, request=3222817548) at ../sysdeps/unix/sysv/linux/ioctl.c:36
    * 6    AMDGPU Wave 2:2:1:1 (0,0,0)/0                do_an_addition (
        a=<error reading variable: DWARF-2 expression error: `DW_OP_regx' operations must be used either alone or in conjunction with DW_OP_piece or DW_OP_bit_piece.>,
        b=<error reading variable: DWARF-2 expression error: `DW_OP_regx' operations must be used either alone or in conjunction with DW_OP_piece or DW_OP_bit_piece.>,
        out=<error reading variable: DWARF-2 expression error: `DW_OP_regx' operations must be used either alone or in conjunction with DW_OP_piece or DW_OP_bit_piece.>) at simple.cpp:24
    (gdb) bt
    Python Exception <class 'gdb.error'>: Unhandled dwarf expression opcode 0xe1
    #0  do_an_addition (a=<error reading variable: DWARF-2 expression error: `DW_OP_regx' operations must be used either alone or in conjunction with DW_OP_piece or DW_OP_bit_piece.>,
        b=<error reading variable: DWARF-2 expression error: `DW_OP_regx' operations must be used either alone or in conjunction with DW_OP_piece or DW_OP_bit_piece.>,
        out=<error reading variable: DWARF-2 expression error: `DW_OP_regx' operations must be used either alone or in conjunction with DW_OP_piece or DW_OP_bit_piece.>) at simple.cpp:24
    (gdb) continue
    Continuing.
    result is 3
    warning: Temporarily disabling breakpoints for unloaded shared library "file:///home/smarchi/build/binutils-gdb-amdgpu/gdb/simple#offset=8192&size=67208"
    [Thread 0x7ffff54bf640 (LWP 1083186) exited]
    [Thread 0x7ffff5db7640 (LWP 1082911) exited]
    [Inferior 1 (process 1082907) exited normally]

One thing to notice is the host and GPU threads appearing under
the same inferior.  This is a design goal for us, as programmers tend to
think of the threads running on the GPU as part of the same program as
the host threads, so showing them in the same inferior in GDB seems
natural.  Also, the host and GPU threads share a global memory space,
which fits the inferior model.

Another thing to notice is the error messages when trying to read
variables or printing a backtrace.  This is expected for the moment,
since the AMD GPU compiler produces some DWARF that uses some
non-standard extensions:

  https://llvm.org/docs/AMDGPUDwarfExtensionsForHeterogeneousDebugging.html

There were already some patches posted by Zoran Zaric earlier to make
GDB support these extensions:

  https://inbox.sourceware.org/gdb-patches/20211105113849.118800-1-zoran.zaric@amd.com/

We think it's better to get the basic support for AMD GPU in first,
which will then give a better justification for GDB to support these
extensions.

GPU threads are named `AMDGPU Wave`: a wave is essentially a hardware
thread using the SIMT (single-instruction, multiple-threads) [3]
execution model.

GDB uses the amd-dbgapi library [4], included in the ROCm platform, for
a few things related to AMD GPU threads debugging.  Different components
talk to the library, as show on the following diagram:

    +---------------------------+     +-------------+     +------------------+
    | GDB   | amd-dbgapi target | <-> |     AMD     |     |    Linux kernel  |
    |       +-------------------+     |   Debugger  |     +--------+         |
    |       | amdgcn gdbarch    | <-> |     API     | <=> | AMDGPU |         |
    |       +-------------------+     |             |     | driver |         |
    |       | solib-rocm        | <-> | (dbgapi.so) |     +--------+---------+
    +---------------------------+     +-------------+

  - The amd-dbgapi target is a target_ops implementation used to control
    execution of GPU threads.  While the debugging of host threads works
    by using the ptrace / wait Linux kernel interface (as usual), control
    of GPU threads is done through a special interface (dubbed `kfd`)
    exposed by the `amdgpu` Linux kernel module.  GDB doesn't interact
    directly with `kfd`, but instead goes through the amd-dbgapi library
    (AMD Debugger API on the diagram).

    Since it provides execution control, the amd-dbgapi target should
    normally be a process_stratum_target, not just a target_ops.  More
    on that later.

  - The amdgcn gdbarch (describing the hardware architecture of the GPU
    execution units) offloads some requests to the amd-dbgapi library,
    so that knowledge about the various architectures doesn't need to be
    duplicated and baked in GDB.  This is for example for things like
    the list of registers.

  - The solib-rocm component is an solib provider that fetches the list of
    code objects loaded on the device from the amd-dbgapi library, and
    makes GDB read their symbols.  This is very similar to other solib
    providers that handle shared libraries, except that here the shared
    libraries are the pieces of code loaded on the device.

Given that Linux host threads are managed by the linux-nat target, and
the GPU threads are managed by the amd-dbgapi target, having all threads
appear in the same inferior requires the two targets to be in that
inferior's target stack.  However, there can only be one
process_stratum_target in a given target stack, since there can be only
one target per slot.  To achieve it, we therefore resort the hack^W
solution of placing the amd-dbgapi target in the arch_stratum slot of
the target stack, on top of the linux-nat target.  Doing so allows the
amd-dbgapi target to intercept target calls and handle them if they
concern GPU threads, and offload to beneath otherwise.  See
amd_dbgapi_target::fetch_registers for a simple example:

    void
    amd_dbgapi_target::fetch_registers (struct regcache *regcache, int regno)
    {
      if (!ptid_is_gpu (regcache->ptid ()))
        {
          beneath ()->fetch_registers (regcache, regno);
          return;
        }

      // handle it
    }

ptids of GPU threads are crafted with the following pattern:

  (pid, 1, wave id)

Where pid is the inferior's pid and "wave id" is the wave handle handed
to us by the amd-dbgapi library (in practice, a monotonically
incrementing integer).  The idea is that on Linux systems, the
combination (pid != 1, lwp == 1) is not possible.  lwp == 1 would always
belong to the init process, which would also have pid == 1 (and it's
improbable for the init process to offload work to the GPU and much less
for the user to debug it).  We can therefore differentiate GPU and
non-GPU ptids this way.  See ptid_is_gpu for more details.

Note that we believe that this scheme could break down in the context of
containers, where the initial process executed in a container has pid 1
(in its own pid namespace).  For instance, if you were to execute a ROCm
program in a container, then spawn a GDB in that container and attach to
the process, it will likely not work.  This is a known limitation.  A
workaround for this is to have a dummy process (like a shell) fork and
execute the program of interest.

The amd-dbgapi target watches native inferiors, and "attaches" to them
using amd_dbgapi_process_attach, which gives it a notifier fd that is
registered in the event loop (see enable_amd_dbgapi).  Note that this
isn't the same "attach" as in PTRACE_ATTACH, but being ptrace-attached
is a precondition for amd_dbgapi_process_attach to work.  When the
debugged process enables the ROCm runtime, the amd-dbgapi target gets
notified through that fd, and pushes itself on the target stack of the
inferior.  The amd-dbgapi target is then able to intercept target_ops
calls.  If the debugged process disables the ROCm runtime, the
amd-dbgapi target unpushes itself from the target stack.

This way, the amd-dbgapi target's footprint stays minimal when debugging
a process that doesn't use the AMD ROCm platform, it does not intercept
target calls.

The amd-dbgapi library is found using pkg-config.  Since enabling
support for the amdgpu architecture (amdgpu-tdep.c) depends on the
amd-dbgapi library being present, we have the following logic for
the interaction with --target and --enable-targets:

 - if the user explicitly asks for amdgcn support with
   --target=amdgcn-*-* or --enable-targets=amdgcn-*-*, we probe for
   the amd-dbgapi and fail if not found

 - if the user uses --enable-targets=all, we probe for amd-dbgapi,
   enable amdgcn support if found, disable amdgcn support if not found

 - if the user uses --enable-targets=all and --with-amd-dbgapi=yes,
   we probe for amd-dbgapi, enable amdgcn if found and fail if not found

 - if the user uses --enable-targets=all and --with-amd-dbgapi=no,
   we do not probe for amd-dbgapi, disable amdgcn support

 - otherwise, amd-dbgapi is not probed for and support for amdgcn is not
   enabled

Finally, a simple test is included.  It only tests hitting a breakpoint
in device code and resuming execution, pretty much like the example
shown above.

[1] https://docs.amd.com/category/ROCm_v5.4
[2] https://docs.amd.com/bundle/HIP-Programming-Guide-v5.4
[3] https://en.wikipedia.org/wiki/Single_instruction,_multiple_threads
[4] https://docs.amd.com/bundle/ROCDebugger-API-Guide-v5.4

Change-Id: I591edca98b8927b1e49e4b0abe4e304765fed9ee
Co-Authored-By: Zoran Zaric <zoran.zaric@amd.com>
Co-Authored-By: Laurent Morichetti <laurent.morichetti@amd.com>
Co-Authored-By: Tony Tye <Tony.Tye@amd.com>
Co-Authored-By: Lancelot SIX <lancelot.six@amd.com>
Co-Authored-By: Pedro Alves <pedro@palves.net>
2023-02-02 10:02:34 -05:00

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dnl Autoconf configure script for GDB, the GNU debugger.
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AC_INIT
AC_CONFIG_MACRO_DIRS([.. ../config])
AC_CONFIG_SRCDIR([main.c])
AC_CONFIG_HEADERS(config.h:config.in, [echo > stamp-h])
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AC_PROG_CC
AC_PROG_CXX
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AX_CXX_COMPILE_STDCXX(11, , mandatory)
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# a condition), we must call PKG_PROG_PKG_CONFIG explicitly to probe for
# pkg-config.
PKG_PROG_PKG_CONFIG
dnl List of object files and targets accumulated by configure.
CONFIG_OBS=
CONFIG_DEPS=
CONFIG_SRCS=
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dnl Set up for gettext.
ZW_GNU_GETTEXT_SISTER_DIR
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AC_SUBST(localedir)
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AC_DEFINE_UNQUOTED(PACKAGE, "$PACKAGE", [Name of this package. ])
AC_SUBST(PACKAGE)
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# version of the library.
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gdb_sim=
gdb_osabi=
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# Fetch the default architecture and default target vector from BFD.
targ=$target; . $srcdir/../bfd/config.bfd
# We only want the first architecture, so strip off the others if
# there is more than one.
targ_archs=`echo $targ_archs | sed 's/ .*//'`
if test "x$targ_archs" != x; then
AC_DEFINE_UNQUOTED(DEFAULT_BFD_ARCH, $targ_archs,
[Define to BFD's default architecture. ])
fi
if test "x$targ_defvec" != x; then
AC_DEFINE_UNQUOTED(DEFAULT_BFD_VEC, $targ_defvec,
[Define to BFD's default target vector. ])
fi
# Enable MI.
AC_ARG_ENABLE([gdbmi],
[AS_HELP_STRING([--disable-gdbmi], [disable machine-interface (MI)])],
[GDB_CHECK_YES_NO_VAL([$enableval], [--enable-gdbmi])],
[enable_gdbmi=yes])
if test x"$enable_gdbmi" = xyes; then
if test -d "$srcdir/mi"; then
CONFIG_OBS="$CONFIG_OBS \$(SUBDIR_MI_OBS)"
CONFIG_DEPS="$CONFIG_DEPS \$(SUBDIR_MI_DEPS)"
CONFIG_SRCS="$CONFIG_SRCS \$(SUBDIR_MI_SRCS)"
ENABLE_CFLAGS="$ENABLE_CFLAGS \$(SUBDIR_MI_CFLAGS)"
fi
fi
# Enable TUI.
AC_ARG_ENABLE(tui,
AS_HELP_STRING([--enable-tui],
[enable full-screen terminal user interface (TUI)]),
[GDB_CHECK_YES_NO_AUTO_VAL([$enableval], [--enable-tui])],
[enable_tui=auto])
# Enable gdbtk.
AC_ARG_ENABLE([gdbtk],
[AS_HELP_STRING([--enable-gdbtk], [enable gdbtk graphical user interface (GUI)])],
[GDB_CHECK_YES_NO_VAL([$enableval], [--enable-gdbtk])],
[if test -d "$srcdir/gdbtk"; then
enable_gdbtk=yes
else
enable_gdbtk=no
fi])
# We unconditionally disable gdbtk tests on selected platforms.
case $host_os in
go32* | windows*)
AC_MSG_WARN([gdbtk isn't supported on $host; disabling])
enable_gdbtk=no ;;
esac
# Handle optional debuginfod support
AC_DEBUGINFOD
# Libunwind support for ia64.
AC_ARG_WITH(libunwind-ia64,
AS_HELP_STRING([--with-libunwind-ia64],
[use libunwind frame unwinding for ia64 targets]),,
[with_libunwind_ia64=auto])
# Backward compatibility option.
if test "${with_libunwind+set}" = set; then
if test x"$with_libunwind_ia64" != xauto; then
AC_MSG_ERROR(
[option --with-libunwind is deprecated, use --with-libunwind-ia64])
fi
AC_MSG_WARN([option --with-libunwind is deprecated, use --with-libunwind-ia64])
with_libunwind_ia64="$with_libunwind"
fi
case "$with_libunwind_ia64" in
yes | no)
;;
auto)
AC_CHECK_HEADERS(libunwind-ia64.h)
with_libunwind_ia64=$ac_cv_header_libunwind_ia64_h
;;
*)
AC_MSG_ERROR(
[bad value $with_libunwind_ia64 for GDB --with-libunwind-ia64 option])
;;
esac
if test x"$with_libunwind_ia64" = xyes; then
AC_CHECK_HEADERS(libunwind-ia64.h)
if test x"$ac_cv_header_libunwind_ia64_h" != xyes; then
AC_MSG_ERROR([GDB option --with-libunwind-ia64 requires libunwind-ia64.h])
fi
CONFIG_OBS="$CONFIG_OBS ia64-libunwind-tdep.o"
CONFIG_DEPS="$CONFIG_DEPS ia64-libunwind-tdep.o"
CONFIG_SRCS="$CONFIG_SRCS ia64-libunwind-tdep.c"
fi
opt_curses=no
AC_ARG_WITH(curses, AS_HELP_STRING([--with-curses], [use the curses library instead of the termcap library]), opt_curses=$withval)
prefer_curses=no
if test "$opt_curses" = "yes"; then
prefer_curses=yes
fi
# Profiling support.
AC_ARG_ENABLE([profiling],
[AS_HELP_STRING([--enable-profiling], [enable profiling of GDB])],
[GDB_CHECK_YES_NO_VAL([$enableval], [--enable-profiling])],
[enable_profiling=no])
AC_CHECK_FUNCS(monstartup _mcleanup)
AC_CACHE_CHECK(
[for _etext],
[ac_cv_var__etext],
[AC_LINK_IFELSE(
[AC_LANG_PROGRAM(
[#include <stdlib.h>
extern char _etext;],
[free (&_etext);]
)],
[ac_cv_var__etext=yes],
[ac_cv_var__etext=no]
)]
)
if test "$ac_cv_var__etext" = yes; then
AC_DEFINE(HAVE__ETEXT, 1,
[Define to 1 if your system has the _etext variable. ])
fi
AC_CACHE_CHECK(
[for etext],
[ac_cv_var_etext],
[AC_LINK_IFELSE(
[AC_LANG_PROGRAM(
[#include <stdlib.h>
extern char etext;],
[free (&etext);]
)],
[ac_cv_var_etext=yes],
[ac_cv_var_etext=no]
)]
)
if test "$ac_cv_var_etext" = yes; then
AC_DEFINE(HAVE_ETEXT, 1,
[Define to 1 if your system has the etext variable. ])
fi
if test "$enable_profiling" = yes ; then
if test "$ac_cv_func_monstartup" = no || test "$ac_cv_func__mcleanup" = no; then
AC_MSG_ERROR(--enable-profiling requires monstartup and _mcleanup)
fi
PROFILE_CFLAGS=-pg
OLD_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $PROFILE_CFLAGS"
AC_CACHE_CHECK(
[whether $CC supports -pg],
[ac_cv_cc_supports_pg],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([], [int x;])],
[ac_cv_cc_supports_pg=yes],
[ac_cv_cc_supports_pg=no]
)]
)
if test "$ac_cv_cc_supports_pg" = no; then
AC_MSG_ERROR(--enable-profiling requires a compiler which supports -pg)
fi
CFLAGS="$OLD_CFLAGS"
fi
CODESIGN_CERT=
AC_ARG_ENABLE([codesign],
AS_HELP_STRING([--enable-codesign=CERT],
[sign gdb with 'codesign -s CERT']),
[CODESIGN_CERT=$enableval])
AC_SUBST([CODESIGN_CERT])
ACX_PKGVERSION([GDB])
ACX_BUGURL([https://www.gnu.org/software/gdb/bugs/])
AC_DEFINE_UNQUOTED([PKGVERSION], ["$PKGVERSION"], [Additional package description])
AC_DEFINE_UNQUOTED([REPORT_BUGS_TO], ["$REPORT_BUGS_TO"], [Bug reporting address])
# --------------------- #
# Checks for programs. #
# --------------------- #
AC_PROG_AWK
AC_PROG_INSTALL
AC_PROG_LN_S
AC_PROG_RANLIB
AC_PROG_YACC
AC_CHECK_TOOL(AR, ar)
AC_CHECK_TOOL(DLLTOOL, dlltool)
AC_CHECK_TOOL(WINDRES, windres)
case $host_os in
gnu*)
# Needed for GNU Hurd hosts.
AC_CHECK_TOOL(MIG, mig)
if test x"$MIG" = x; then
AC_MSG_ERROR([MIG not found but required for $host hosts])
fi
;;
esac
# ---------------------- #
# Checks for libraries. #
# ---------------------- #
# We might need to link with -lm; most simulators need it.
AC_CHECK_LIB(m, main)
# Some systems (e.g. Solaris) have `gethostbyname' in libnsl.
AC_SEARCH_LIBS(gethostbyname, nsl)
# Some systems (e.g. Solaris) have `socketpair' in libsocket.
AC_SEARCH_LIBS(socketpair, socket)
# Link in zlib/zstd if we can. This allows us to read compressed debug
# sections.
AM_ZLIB
AC_ZSTD
AM_ICONV
# GDB may fork/exec the iconv program to get the list of supported character
# sets. Allow the user to specify where to find it.
# There are several factors affecting the choice of option name:
# - There is already --with-libiconv-prefix but we can't use it, it specifies
# the build-time location of libiconv files.
# - The program we need to find is iconv, which comes with glibc. The user
# doesn't necessarily have libiconv installed. Therefore naming this
# --with-libiconv-foo feels wrong.
# - We want the path to be relocatable, but GDB_AC_DEFINE_RELOCATABLE is
# defined to work on directories not files (though it really doesn't know
# the difference).
# - Calling this --with-iconv-prefix is perceived to cause too much confusion
# with --with-libiconv-prefix.
# Putting these together is why the option name is --with-iconv-bin.
AC_ARG_WITH(iconv-bin,
AS_HELP_STRING([--with-iconv-bin=PATH], [specify where to find the iconv program]),
[iconv_bin="${withval}"
AC_DEFINE_UNQUOTED([ICONV_BIN], ["${iconv_bin}"],
[Path of directory of iconv program.])
GDB_AC_DEFINE_RELOCATABLE(ICONV_BIN, iconv, ${iconv_bin})
])
# For the TUI, we need enhanced curses functionality.
if test x"$enable_tui" != xno; then
prefer_curses=yes
fi
curses_found=no
if test x"$prefer_curses" = xyes; then
# FIXME: kettenis/20040905: We prefer ncurses over the vendor-supplied
# curses library because the latter might not provide all the
# functionality we need. However, this leads to problems on systems
# where the linker searches /usr/local/lib, but the compiler doesn't
# search /usr/local/include, if ncurses is installed in /usr/local. A
# default installation of ncurses on alpha*-dec-osf* will lead to such
# a situation.
AC_SEARCH_LIBS(waddstr, [ncursesw ncurses cursesX curses])
if test "$ac_cv_search_waddstr" != no; then
curses_found=yes
fi
fi
# Check whether we should enable the TUI, but only do so if we really
# can.
if test x"$enable_tui" != xno; then
if test -d "$srcdir/tui"; then
if test "$curses_found" != no; then
CONFIG_OBS="$CONFIG_OBS \$(SUBDIR_TUI_OBS)"
CONFIG_DEPS="$CONFIG_DEPS \$(SUBDIR_TUI_DEPS)"
CONFIG_SRCS="$CONFIG_SRCS \$(SUBDIR_TUI_SRCS)"
ENABLE_CFLAGS="$ENABLE_CFLAGS \$(SUBDIR_TUI_CFLAGS)"
else
if test x"$enable_tui" = xyes; then
AC_MSG_ERROR([no enhanced curses library found; disable TUI])
else
AC_MSG_WARN([no enhanced curses library found; disabling TUI])
fi
fi
fi
fi
# Since GDB uses Readline, we need termcap functionality. In many
# cases this will be provided by the curses library, but some systems
# have a separate termcap library, or no curses library at all.
case $host_os in
cygwin*)
if test -d "$srcdir/libtermcap"; then
LIBS="../libtermcap/libtermcap.a $LIBS"
ac_cv_search_tgetent="../libtermcap/libtermcap.a"
fi ;;
go32* | *djgpp*)
ac_cv_search_tgetent="none required"
;;
esac
# These are the libraries checked by Readline.
AC_SEARCH_LIBS(tgetent, [termcap tinfow tinfo curses ncursesw ncurses])
if test "$ac_cv_search_tgetent" = no; then
CONFIG_OBS="$CONFIG_OBS stub-termcap.o"
fi
AC_ARG_WITH([system-readline],
[AS_HELP_STRING([--with-system-readline],
[use installed readline library])])
if test "$with_system_readline" = yes; then
AC_CHECK_HEADERS(readline/readline.h, [readline_h=yes], [readline_h=no])
if test "$readline_h" = "no"; then
AC_MSG_ERROR([readline development packages are probably missing])
fi
AC_CACHE_CHECK(
[whether system readline is new enough],
[gdb_cv_readline_ok],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[#include <stdio.h>
#include <readline/readline.h>],
[#if RL_VERSION_MAJOR < 7
# error "readline version 7 required"
#endif]
)],
[gdb_cv_readline_ok=yes],
[gdb_cv_readline_ok=no]
)]
)
if test "$gdb_cv_readline_ok" != yes; then
AC_MSG_ERROR([system readline is not new enough])
fi
READLINE=-lreadline
READLINE_DEPS=
READLINE_CFLAGS=
READLINE_TEXI_INCFLAG=
else
READLINE='$(READLINE_DIR)/libreadline.a'
READLINE_DEPS='$(READLINE)'
READLINE_CFLAGS='-I$(READLINE_SRC)/..'
READLINE_TEXI_INCFLAG='-I $(READLINE_DIR)'
fi
AC_SUBST(READLINE)
AC_SUBST(READLINE_DEPS)
AC_SUBST(READLINE_CFLAGS)
AC_SUBST(READLINE_TEXI_INCFLAG)
# Generate jit-reader.h
# This is typedeffed to GDB_CORE_ADDR in jit-reader.h
TARGET_PTR=
AC_CHECK_SIZEOF(unsigned long long)
AC_CHECK_SIZEOF(unsigned long)
AC_CHECK_SIZEOF(unsigned __int128)
if test "x${ac_cv_sizeof_unsigned_long}" = "x8"; then
TARGET_PTR="unsigned long"
elif test "x${ac_cv_sizeof_unsigned_long_long}" = "x8"; then
TARGET_PTR="unsigned long long"
elif test "x${ac_cv_sizeof_unsigned___int128}" = "x16"; then
TARGET_PTR="unsigned __int128"
else
TARGET_PTR="unsigned long"
fi
AC_SUBST(TARGET_PTR)
AC_CONFIG_FILES([jit-reader.h:jit-reader.in])
AC_SEARCH_LIBS(dlopen, dl)
GDB_AC_WITH_DIR([JIT_READER_DIR], [jit-reader-dir],
[directory to load the JIT readers from],
[${libdir}/gdb])
AC_ARG_WITH(expat,
AS_HELP_STRING([--with-expat], [include expat support (auto/yes/no)]),
[], [with_expat=auto])
AC_MSG_CHECKING([whether to use expat])
AC_MSG_RESULT([$with_expat])
if test "${with_expat}" = no; then
AC_MSG_WARN([expat support disabled; some features may be unavailable.])
HAVE_LIBEXPAT=no
else
AC_LIB_HAVE_LINKFLAGS([expat], [], [#include "expat.h"],
[XML_Parser p = XML_ParserCreate (0);])
if test "$HAVE_LIBEXPAT" != yes; then
if test "$with_expat" = yes; then
AC_MSG_ERROR([expat is missing or unusable])
else
AC_MSG_WARN([expat is missing or unusable; some features may be unavailable.])
fi
else
save_LIBS=$LIBS
LIBS="$LIBS $LIBEXPAT"
AC_CHECK_FUNCS(XML_StopParser)
LIBS=$save_LIBS
fi
fi
AC_ARG_VAR(GMPLIBS,[How to link GMP])
AC_ARG_VAR(GMPINC,[How to find GMP include files])
# --------------------- #
# Check for libpython. #
# --------------------- #
dnl Utility to simplify finding libpython.
dnl $1 = the shell variable to assign the result to
dnl If libpython is found we store $version here.
dnl $2 = additional flags to add to CPPFLAGS
dnl $3 = additional flags to add to LIBS
AC_DEFUN([AC_TRY_LIBPYTHON],
[
define([have_libpython_var],$1)
new_CPPFLAGS=$2
new_LIBS=$3
AC_MSG_CHECKING([for python])
save_CPPFLAGS=$CPPFLAGS
save_LIBS=$LIBS
CPPFLAGS="$CPPFLAGS $new_CPPFLAGS"
LIBS="$new_LIBS $LIBS"
found_usable_python=no
AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include "Python.h"]],
[[
#if PY_MAJOR_VERSION != 3
# error "We only support Python 3"
#endif
Py_Initialize ();
]])],
[have_libpython_var=yes
found_usable_python=yes
PYTHON_CPPFLAGS=$new_CPPFLAGS
PYTHON_LIBS=$new_LIBS])
CPPFLAGS=$save_CPPFLAGS
LIBS=$save_LIBS
AC_MSG_RESULT([${found_usable_python}])
])
dnl There are several different values for --with-python:
dnl
dnl no - Don't include python support.
dnl yes - Include python support, error if it's missing.
dnl If we find python in $PATH, use it to fetch configure options,
dnl otherwise assume the compiler can find it with no help from us.
dnl auto - Same as "yes", but if python is missing from the system,
dnl fall back to "no".
dnl /path/to/python/exec-prefix -
dnl Use the python located in this directory.
dnl If /path/to/python/exec-prefix/bin/python exists, use it to find
dnl the compilation parameters. Otherwise use
dnl -I/path/to/python/exec-prefix/include,
dnl -L/path/to/python/exec-prefix/lib.
dnl NOTE: This case is historical. It is what was done for 7.0/7.1
dnl but is deprecated.
dnl /path/to/python/executable -
dnl Run python-config.py with this version of python to fetch the
dnl compilation parameters.
dnl NOTE: This needn't be the real python executable.
dnl In a cross-compilation scenario (build != host), this could be
dnl a shell script that provides what python-config.py provides for
dnl --ldflags, --includes, --exec-prefix.
dnl python-executable -
dnl Find python-executable in $PATH, and then handle the same as
dnl /path/to/python/executable.
dnl
dnl If a python program is specified, it is used to run python-config.py and
dnl is passed --ldflags, --includes, --exec-prefix.
AC_ARG_WITH(python,
AS_HELP_STRING([--with-python@<:@=PYTHON@:>@], [include python support (auto/yes/no/<python-program>)]),
[], [with_python=auto])
AC_MSG_CHECKING([whether to use python])
AC_MSG_RESULT([$with_python])
if test "${with_python}" = no; then
AC_MSG_WARN([python support disabled; some features may be unavailable.])
have_libpython=no
else
case "${with_python}" in
[[\\/]]* | ?:[[\\/]]*)
if test -d "${with_python}"; then
# Assume the python binary is ${with_python}/bin/python.
python_prog="${with_python}/bin/python"
python_prefix=
# If python does not exit ${with_python}/bin, then try in
# ${with_python}. On Windows/MinGW, this is where the Python
# executable is.
if test ! -x "${python_prog}"; then
python_prog="${with_python}/python"
python_prefix=
fi
if test ! -x "${python_prog}"; then
# Fall back to gdb 7.0/7.1 behaviour.
python_prog=missing
python_prefix=${with_python}
fi
elif test -x "${with_python}"; then
# While we can't run python compiled for $host (unless host == build),
# the user could write a script that provides the needed information,
# so we support that.
python_prog=${with_python}
python_prefix=
else
AC_MSG_ERROR(invalid value for --with-python)
fi
;;
*/*)
# Disallow --with-python=foo/bar.
AC_MSG_ERROR(invalid value for --with-python)
;;
*)
# The user has either specified auto, yes, or the name of the python
# program assumed to be in $PATH.
python_prefix=
case "${with_python}" in
yes | auto)
if test "${build}" = "${host}"; then
# Look first for 'python', then 'python3'.
AC_PATH_PROGS(python_prog_path, [python python3], missing)
if test "${python_prog_path}" = missing; then
python_prog=missing
else
python_prog=${python_prog_path}
fi
else
# Not much we can do except assume the cross-compiler will find the
# right files.
python_prog=missing
fi
;;
*)
# While we can't run python compiled for $host (unless host == build),
# the user could write a script that provides the needed information,
# so we support that.
python_prog="${with_python}"
AC_PATH_PROG(python_prog_path, ${python_prog}, missing)
if test "${python_prog_path}" = missing; then
AC_MSG_ERROR(unable to find python program ${python_prog})
fi
;;
esac
esac
if test "${python_prog}" != missing; then
# We have a python program to use, but it may be too old.
# Don't flag an error for --with-python=auto (the default).
have_python_config=yes
python_includes=`${python_prog} ${srcdir}/python/python-config.py --includes`
if test $? != 0; then
have_python_config=failed
if test "${with_python}" != auto; then
AC_MSG_ERROR(failure running python-config --includes)
fi
fi
python_libs=`${python_prog} ${srcdir}/python/python-config.py --ldflags`
if test $? != 0; then
have_python_config=failed
if test "${with_python}" != auto; then
AC_MSG_ERROR(failure running python-config --ldflags)
fi
fi
python_prefix=`${python_prog} ${srcdir}/python/python-config.py --exec-prefix`
if test $? != 0; then
have_python_config=failed
if test "${with_python}" != auto; then
AC_MSG_ERROR(failure running python-config --exec-prefix)
fi
fi
else
# We do not have a python executable we can use to determine where
# to find the Python headers and libs. We cannot guess the include
# path from the python_prefix either, because that include path
# depends on the Python version. So, there is nothing much we can
# do except assume that the compiler will be able to find those files.
python_includes=
python_libs=
have_python_config=no
fi
# If we have python-config, only try the configuration it provides.
# Otherwise fallback on the old way of trying different versions of
# python in turn.
have_libpython=no
if test "${have_python_config}" = yes; then
AC_TRY_LIBPYTHON(have_libpython,
${python_includes}, ${python_libs})
fi
if test "${have_libpython}" = no; then
case "${with_python}" in
yes)
AC_MSG_ERROR([python is missing or unusable])
;;
auto)
AC_MSG_WARN([python is missing or unusable; some features may be unavailable.])
;;
*)
AC_MSG_ERROR([no usable python found at ${with_python}])
;;
esac
else
if test -n "${python_prefix}"; then
AC_DEFINE_UNQUOTED(WITH_PYTHON_PATH, "${python_prefix}",
[Define if --with-python provides a path, either directly or via python-config.py --exec-prefix.])
GDB_AC_DEFINE_RELOCATABLE(PYTHON_PATH, python, ${python_prefix})
fi
fi
fi
dnl Use --with-python-libdir to control where GDB looks for the Python
dnl libraries.
dnl
dnl If this is not given then the default will be based on the value
dnl passed to --with-python, which is in the python_prefix variable.
dnl If the --with-python option wasn't given then the default value in
dnl python_prefix is based on running the 'gdb/python/python-config
dnl --exec-prefix' script.
AC_ARG_WITH(python-libdir,
AS_HELP_STRING([--with-python-libdir@<:@=DIR@:>@], [search for python's libraries in DIR]),
[],[
# If no python libdir is specified then select one based on
# python's prefix path.
if test -n "${python_prefix}"; then
with_python_libdir=${python_prefix}/lib
fi
])
if test "${have_libpython}" != no; then
AC_DEFINE(HAVE_PYTHON, 1, [Define if Python interpreter is being linked in.])
CONFIG_OBS="$CONFIG_OBS \$(SUBDIR_PYTHON_OBS)"
CONFIG_DEPS="$CONFIG_DEPS \$(SUBDIR_PYTHON_DEPS)"
CONFIG_SRCS="$CONFIG_SRCS \$(SUBDIR_PYTHON_SRCS)"
CONFIG_INSTALL="$CONFIG_INSTALL install-python"
ENABLE_CFLAGS="$ENABLE_CFLAGS \$(SUBDIR_PYTHON_CFLAGS)"
if test -n "${with_python_libdir}"; then
AC_DEFINE_UNQUOTED(WITH_PYTHON_LIBDIR, "${with_python_libdir}",
[Directory containing Python's standard libraries from --with-python-libdir.])
GDB_AC_DEFINE_RELOCATABLE(PYTHON_LIBDIR, [python lib], ${with_python_libdir})
fi
# Flags needed to compile Python code (taken from python-config --cflags).
# We cannot call python-config directly because it will output whatever was
# used when compiling the Python interpreter itself, including flags which
# would make the python-related objects be compiled differently from the
# rest of GDB (e.g., -O2 and -fPIC).
if test "${GCC}" = yes; then
tentative_python_cflags="-fno-strict-aliasing -fwrapv"
# Python headers recommend -DNDEBUG, but it's unclear if that just
# refers to building Python itself. In release mode, though, it
# doesn't hurt for the Python code in gdb to follow.
$development || tentative_python_cflags="$tentative_python_cflags -DNDEBUG"
fi
if test "x${tentative_python_cflags}" != x; then
AC_MSG_CHECKING(compiler flags for python code)
for flag in ${tentative_python_cflags}; do
# Check that the compiler accepts it
saved_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $flag"
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([], [])],
[PYTHON_CFLAGS="${PYTHON_CFLAGS} $flag"],
[]
)
CFLAGS="$saved_CFLAGS"
done
AC_MSG_RESULT(${PYTHON_CFLAGS})
fi
# On x64 Windows, Python's include headers, and pyconfig.h in
# particular, rely on MS_WIN64 macro to detect that it's a 64bit
# version of Windows. Unfortunately, MS_WIN64 is only defined if
# _MSC_VER, a Microsoft-specific macro, is defined. So, when
# building on x64 Windows with GCC, we define MS_WIN64 ourselves.
# The issue was reported to the Python community, but still isn't
# solved as of 2012-10-02 (http://bugs.python.org/issue4709).
case "$gdb_host" in
mingw64)
if test "${GCC}" = yes; then
CPPFLAGS="$CPPFLAGS -DMS_WIN64"
fi
;;
esac
else
# Even if Python support is not compiled in, we need to have this file
# included so that the "python" command, et.al., still exists.
CONFIG_OBS="$CONFIG_OBS python/python.o"
CONFIG_SRCS="$CONFIG_SRCS python/python.c"
fi
# Work around Python http://bugs.python.org/issue10112. See also
# http://bugs.python.org/issue11410, otherwise -Wl,--dynamic-list has
# no effect. Note that the only test after this that uses Python is
# the -rdynamic/-Wl,--dynamic-list test, and we do want that one to be
# run without -export-dynamic too.
PYTHON_LIBS=`echo $PYTHON_LIBS | sed -e 's/-Xlinker -export-dynamic//'`
AC_SUBST(PYTHON_CFLAGS)
AC_SUBST(PYTHON_CPPFLAGS)
AC_SUBST(PYTHON_LIBS)
AM_CONDITIONAL(HAVE_PYTHON, test "${have_libpython}" != no)
# -------------------- #
# Check for libguile. #
# -------------------- #
dnl Utility to simplify finding libguile.
dnl $1 = pkg-config-program
dnl $2 = space-separate list of guile versions to try
dnl $3 = yes|no, indicating whether to flag errors or ignore them
dnl $4 = the shell variable to assign the result to
dnl If libguile is found we store "yes" here.
AC_DEFUN([AC_TRY_LIBGUILE],
[
pkg_config=$1
guile_version_list=$2
flag_errors=$3
define([have_libguile_var],$4)
found_usable_guile=checking
AC_MSG_CHECKING([for usable guile from ${pkg_config}])
for guile_version in ${guile_version_list}; do
${pkg_config} --exists ${guile_version} 2>/dev/null
if test $? != 0; then
continue
fi
dnl pkg-config says the package exists, so if we get an error now,
dnl that's bad.
new_CPPFLAGS=`${pkg_config} --cflags ${guile_version}`
if test $? != 0; then
AC_MSG_ERROR([failure running pkg-config --cflags ${guile_version}])
fi
new_LIBS=`${pkg_config} --libs ${guile_version}`
if test $? != 0; then
AC_MSG_ERROR([failure running pkg-config --libs ${guile_version}])
fi
dnl If we get this far, great.
found_usable_guile=${guile_version}
break
done
if test "${found_usable_guile}" = "checking"; then
if test "${flag_errors}" = "yes"; then
AC_MSG_ERROR([unable to find usable guile version from "${guile_version_list}"])
else
found_usable_guile=no
fi
fi
dnl One final sanity check.
dnl The user could have said --with-guile=python-2.7.
if test "${found_usable_guile}" != no; then
save_CPPFLAGS=$CPPFLAGS
save_LIBS=$LIBS
CPPFLAGS="$CPPFLAGS $new_CPPFLAGS"
LIBS="$LIBS $new_LIBS"
AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include "libguile.h"]],
[[scm_init_guile ();]])],
[have_libguile_var=yes
GUILE_CPPFLAGS=$new_CPPFLAGS
GUILE_LIBS=$new_LIBS],
[found_usable_guile=no])
dnl scm_set_automatic_finalization_enabled added in Guile 2.2.
AC_CHECK_FUNC(scm_set_automatic_finalization_enabled,
AC_DEFINE(HAVE_GUILE_MANUAL_FINALIZATION, 1,
[Define if Guile supports manual finalization.])
)
CPPFLAGS=$save_CPPFLAGS
LIBS=$save_LIBS
if test "${found_usable_guile}" = no; then
if test "${flag_errors}" = yes; then
AC_MSG_FAILURE([linking guile version ${guile_version} test program failed])
fi
fi
fi
AC_MSG_RESULT([${found_usable_guile}])
])
dnl There are several different values for --with-guile:
dnl
dnl no - Don't include guile support.
dnl yes - Include guile support, error if it's missing.
dnl The pkg-config program must be in $PATH.
dnl auto - Same as "yes", but if guile is missing from the system,
dnl fall back to "no".
dnl guile-version [guile-version-choice-2 ...] -
dnl A space-separated list of guile package versions to try.
dnl These are passed to pkg-config as-is.
dnl E.g., guile-2.0 or guile-2.2-uninstalled
dnl This requires making sure PKG_CONFIG_PATH is set appropriately.
dnl /path/to/pkg-config -
dnl Use this pkg-config program.
dnl NOTE: This needn't be the "real" pkg-config program.
dnl It could be a shell script. It is invoked as:
dnl pkg-config --exists $version
dnl pkg-config --cflags $version
dnl pkg-config --libs $version
dnl pkg-config --variable guild $version
dnl The script will be called with $version having each value in
dnl $try_guile_versions until --exists indicates success.
AC_ARG_WITH(guile,
AS_HELP_STRING([--with-guile@<:@=GUILE@:>@], [include guile support (auto/yes/no/<guile-version>/<pkg-config-program>)]),
[], [with_guile=auto])
AC_MSG_CHECKING([whether to use guile])
AC_MSG_RESULT([$with_guile])
dnl We check guile with pkg-config.
AC_PATH_PROG(pkg_config_prog_path, pkg-config, missing)
try_guile_versions="guile-3.0 guile-2.2 guile-2.0"
have_libguile=no
case "${with_guile}" in
no)
AC_MSG_WARN([guile support disabled; some features will be unavailable.])
;;
auto)
if test "${pkg_config_prog_path}" = "missing"; then
AC_MSG_WARN([pkg-config not found, guile support disabled])
else
AC_TRY_LIBGUILE(${pkg_config_prog_path}, ${try_guile_versions}, no, have_libguile)
fi
;;
yes)
if test "${pkg_config_prog_path}" = "missing"; then
AC_MSG_ERROR([pkg-config not found])
fi
AC_TRY_LIBGUILE(${pkg_config_prog_path}, ${try_guile_versions}, yes, have_libguile)
;;
[[\\/]]* | ?:[[\\/]]*)
if test -x "${with_guile}"; then
AC_TRY_LIBGUILE(${with_guile}, ${try_guile_versions}, yes, have_libguile)
else
AC_MSG_ERROR([Guile config program not executable: ${with_guile}])
fi
;;
"" | */*)
# Disallow --with=guile="" and --with-guile=foo/bar.
AC_MSG_ERROR([invalid value for --with-guile])
;;
*)
# A space separate list of guile versions to try, in order.
if test "${pkg_config_prog_path}" = "missing"; then
AC_MSG_ERROR([pkg-config not found])
fi
AC_TRY_LIBGUILE(${pkg_config_prog_path}, ${with_guile}, yes, have_libguile)
;;
esac
if test "${have_libguile}" != no; then
dnl Get the name of the 'guild' program.
case "${with_guile}" in
[[\\/]]* | ?:[[\\/]]*)
GDB_GUILE_PROGRAM_NAMES(["${with_guile}"], ["${guile_version}"])
;;
*)
GDB_GUILE_PROGRAM_NAMES(["${pkg_config_prog_path}"], ["${guile_version}"])
;;
esac
dnl Make sure guild can handle this host.
GDB_TRY_GUILD([$srcdir/guile/lib/gdb/support.scm])
dnl If not, disable guile support.
if test "$ac_cv_guild_ok" = no; then
have_libguile=no
AC_MSG_WARN(disabling guile support, $GUILD fails compiling for $host)
fi
fi
if test "${have_libguile}" != no; then
AC_DEFINE(HAVE_GUILE, 1, [Define if Guile interpreter is being linked in.])
CONFIG_OBS="$CONFIG_OBS \$(SUBDIR_GUILE_OBS)"
CONFIG_DEPS="$CONFIG_DEPS \$(SUBDIR_GUILE_DEPS)"
CONFIG_SRCS="$CONFIG_SRCS \$(SUBDIR_GUILE_SRCS)"
CONFIG_INSTALL="$CONFIG_INSTALL install-guile"
ENABLE_CFLAGS="$ENABLE_CFLAGS \$(SUBDIR_GUILE_CFLAGS)"
dnl The 'scm_new_smob' function appeared in Guile 2.0.6.
save_LIBS="$LIBS"
save_CPPFLAGS="$CPPFLAGS"
LIBS="$GUILE_LIBS"
CPPFLAGS="$GUILE_CPPFLAGS"
AC_CHECK_FUNCS([scm_new_smob])
LIBS="$save_LIBS"
CPPFLAGS="$save_CPPFLAGS"
else
# Even if Guile support is not compiled in, we need to have these files
# included.
CONFIG_OBS="$CONFIG_OBS guile/guile.o"
CONFIG_SRCS="$CONFIG_SRCS guile/guile.c"
fi
AC_SUBST(GUILE_CPPFLAGS)
AC_SUBST(GUILE_LIBS)
AM_CONDITIONAL(HAVE_GUILE, test "${have_libguile}" != no)
# ---------------------------- #
# Check for source highlight. #
# ---------------------------- #
SRCHIGH_LIBS=
SRCHIGH_CFLAGS=
AC_ARG_ENABLE([source-highlight],
[AS_HELP_STRING([--enable-source-highlight],
[enable source-highlight for source listings])],
[GDB_CHECK_YES_NO_AUTO_VAL([$enableval], [--enable-source-highlight])],
[enable_source_highlight=auto])
if test "${enable_source_highlight}" != "no"; then
AC_MSG_CHECKING([for the source-highlight library])
if test "${pkg_config_prog_path}" = "missing"; then
AC_MSG_RESULT([no - pkg-config not found])
if test "${enable_source_highlight}" = "yes"; then
AC_MSG_ERROR([pkg-config was not found in your system])
fi
else
if ${pkg_config_prog_path} --exists source-highlight; then
case "$LDFLAGS" in
*static-libstdc*)
AC_MSG_ERROR([source highlight is incompatible with -static-libstdc++; dnl
either use --disable-source-highlight or dnl
--without-static-standard-libraries])
;;
esac
srchigh_pkg_cflags=`${pkg_config_prog_path} --cflags source-highlight`
srchigh_pkg_libs=`${pkg_config_prog_path} --libs source-highlight`
# Now that we have found a source-highlight library, check if we can use
# it. In particular, we're trying to detect the situation that the
# library is using the new libstdc++ library abi ( see
# https://gcc.gnu.org/onlinedocs/libstdc++/manual/using_dual_abi.html )
# while the compiler being used to compile gdb is using the old abi.
# Such a situation will result in an undefined reference to
# srchilite::SourceHighlight::SourceHighlight(std::string const&).
# This situation can occur for instance when using a source highlight
# library compiled with g++ 7.5.0 while building gdb with g++ 4.8.5.
AC_LANG_PUSH(C++)
save_CXXFLAGS="$CXXFLAGS"
save_LIBS="$LIBS"
CXXFLAGS="$CXXFLAGS $srchigh_pkg_cflags"
LIBS="$LIBS $srchigh_pkg_libs"
AC_LINK_IFELSE(
[AC_LANG_PROGRAM(
[#include <srchilite/sourcehighlight.h>],
[std::string outlang = "esc.outlang";
new srchilite::SourceHighlight (outlang);]
)],
[have_usable_source_highlight=yes],
[have_usable_source_highlight=no]
)
CXXFLAGS="$save_CXXFLAGS"
LIBS="$save_LIBS"
AC_LANG_POP(C++)
if test "${have_usable_source_highlight}" = "yes"; then
AC_DEFINE([HAVE_SOURCE_HIGHLIGHT], 1,
[Define to 1 if the source-highlight library is available])
AC_MSG_RESULT([yes])
SRCHIGH_CFLAGS="$srchigh_pkg_cflags"
SRCHIGH_LIBS="$srchigh_pkg_libs"
else
AC_MSG_RESULT([no])
if test "${enable_source_highlight}" = "yes"; then
AC_MSG_ERROR([source-highlight in your system could not be used])
fi
fi
else
AC_MSG_RESULT([no])
if test "${enable_source_highlight}" = "yes"; then
AC_MSG_ERROR([source-highlight was not found in your system])
fi
fi
fi
fi
AC_SUBST(SRCHIGH_LIBS)
AC_SUBST(SRCHIGH_CFLAGS)
# ------------------------- #
# Checks for header files. #
# ------------------------- #
AC_HEADER_STDC
# elf_hp.h is for HP/UX 64-bit shared library support.
AC_CHECK_HEADERS([nlist.h machine/reg.h \
thread_db.h \
sys/file.h sys/filio.h sys/ioctl.h sys/param.h \
sys/procctl.h sys/resource.h sys/ptrace.h ptrace.h \
sys/reg.h sys/debugreg.h \
termios.h elf_hp.h])
AC_CHECK_HEADERS(sys/user.h, [], [],
[#if HAVE_SYS_PARAM_H
# include <sys/param.h>
#endif
])
AC_CHECK_HEADERS(curses.h cursesX.h ncurses.h ncursesw/ncurses.h ncurses/ncurses.h ncurses/term.h)
AC_CHECK_HEADERS(term.h, [], [],
[#if HAVE_CURSES_H
# include <curses.h>
#endif
])
AC_CHECK_HEADERS([sys/socket.h])
AC_CHECK_HEADERS([ws2tcpip.h])
AC_CHECK_HEADERS([execinfo.h])
# ------------------------- #
# Checks for declarations. #
# ------------------------- #
libiberty_INIT
AC_CHECK_DECLS([snprintf])
AM_LC_MESSAGES
# ------------------ #
# Checks for types. #
# ------------------ #
AC_CHECK_TYPES(socklen_t, [], [],
[#include <sys/types.h>
#if HAVE_SYS_SOCKET_H
# include <sys/socket.h>
#elif HAVE_WS2TCPIP_H
# include <ws2tcpip.h>
#endif
])
# ------------------------------------- #
# Checks for compiler characteristics. #
# ------------------------------------- #
AC_C_CONST
AC_C_INLINE
AC_C_BIGENDIAN
# ------------------------------ #
# Checks for library functions. #
# ------------------------------ #
AC_CHECK_FUNCS([getuid getgid \
pipe pread pread64 pwrite resize_term \
getpgid setsid \
sigaction sigsetmask socketpair \
ttrace wborder wresize setlocale iconvlist libiconvlist btowc \
setrlimit getrlimit posix_madvise waitpid \
use_default_colors])
AM_LANGINFO_CODESET
GDB_AC_COMMON
# Check the return and argument types of ptrace.
GDB_AC_PTRACE
dnl AC_FUNC_SETPGRP does not work when cross compiling
dnl Instead, assume we will have a prototype for setpgrp if cross compiling.
if test "$cross_compiling" = no; then
AC_FUNC_SETPGRP
else
AC_CACHE_CHECK(
[whether setpgrp takes no argument],
[ac_cv_func_setpgrp_void],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[#include <unistd.h>],
[if (setpgrp(1,1) == -1)
exit (0);
else
exit (1);]
)],
[ac_cv_func_setpgrp_void=no],
[ac_cv_func_setpgrp_void=yes]
)]
)
if test "$ac_cv_func_setpgrp_void" = yes; then
AC_DEFINE(SETPGRP_VOID, 1)
fi
fi
# Check if <sys/proc.h> defines `struct thread' with a td_pcb member.
AC_CHECK_MEMBERS([struct thread.td_pcb], [], [],
[#include <sys/param.h>
#include <sys/proc.h>
])
# See if <sys/lwp.h> defines `struct lwp`.
AC_CACHE_CHECK(
[for struct lwp],
[gdb_cv_struct_lwp],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[#include <sys/param.h>
#define _KMEMUSER
#include <sys/lwp.h>],
[struct lwp l;]
)],
[gdb_cv_struct_lwp=yes],
[gdb_cv_struct_lwp=no]
)]
)
if test "$gdb_cv_struct_lwp" = yes; then
AC_DEFINE(HAVE_STRUCT_LWP, 1,
[Define to 1 if your system has struct lwp.])
fi
# See if <machine/reg.h> degines `struct reg'.
AC_CACHE_CHECK(
[for struct reg in machine/reg.h],
[gdb_cv_struct_reg],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[#include <sys/types.h>
#include <machine/reg.h>],
[struct reg r;]
)],
[gdb_cv_struct_reg=yes],
[gdb_cv_struct_reg=no]
)]
)
if test "$gdb_cv_struct_reg" = yes; then
AC_DEFINE(HAVE_STRUCT_REG, 1,
[Define to 1 if your system has struct reg in <machine/reg.h>.])
fi
# See if <machine/reg.h> supports the %fs and %gs i386 segment registers.
# Older i386 BSD's don't have the r_fs and r_gs members of `struct reg'.
AC_CHECK_MEMBERS([struct reg.r_fs, struct reg.r_gs], [], [],
[#include <sys/types.h>
#include <machine/reg.h>])
# See if <sys/ptrace.h> provides the PTRACE_GETREGS request.
AC_MSG_CHECKING(for PTRACE_GETREGS)
AC_CACHE_VAL(
[gdb_cv_have_ptrace_getregs],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([#include <sys/ptrace.h>], [PTRACE_GETREGS;])],
[gdb_cv_have_ptrace_getregs=yes],
[gdb_cv_have_ptrace_getregs=no]
)]
)
AC_MSG_RESULT($gdb_cv_have_ptrace_getregs)
if test "$gdb_cv_have_ptrace_getregs" = yes; then
AC_DEFINE(HAVE_PTRACE_GETREGS, 1,
[Define if sys/ptrace.h defines the PTRACE_GETREGS request.])
fi
# See if <sys/ptrace.h> provides the PTRACE_GETFPXREGS request.
AC_MSG_CHECKING(for PTRACE_GETFPXREGS)
AC_CACHE_VAL(
[gdb_cv_have_ptrace_getfpxregs],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([#include <sys/ptrace.h>], [PTRACE_GETFPXREGS;])],
[gdb_cv_have_ptrace_getfpxregs=yes],
[gdb_cv_have_ptrace_getfpxregs=no]
)]
)
AC_MSG_RESULT($gdb_cv_have_ptrace_getfpxregs)
if test "$gdb_cv_have_ptrace_getfpxregs" = yes; then
AC_DEFINE(HAVE_PTRACE_GETFPXREGS, 1,
[Define if sys/ptrace.h defines the PTRACE_GETFPXREGS request.])
fi
# See if <sys/ptrace.h> provides the PT_GETDBREGS request.
AC_MSG_CHECKING(for PT_GETDBREGS)
AC_CACHE_VAL(
[gdb_cv_have_pt_getdbregs],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[#include <sys/types.h>
#include <sys/ptrace.h>],
[PT_GETDBREGS;]
)],
[gdb_cv_have_pt_getdbregs=yes],
[gdb_cv_have_pt_getdbregs=no]
)]
)
AC_MSG_RESULT($gdb_cv_have_pt_getdbregs)
if test "$gdb_cv_have_pt_getdbregs" = yes; then
AC_DEFINE(HAVE_PT_GETDBREGS, 1,
[Define if sys/ptrace.h defines the PT_GETDBREGS request.])
fi
# See if <sys/ptrace.h> supports LWP names on FreeBSD
# Older FreeBSD versions don't have the pl_tdname member of
# `struct ptrace_lwpinfo'.
AC_CHECK_MEMBERS([struct ptrace_lwpinfo.pl_tdname], [], [],
[#include <sys/ptrace.h>])
# See if <sys/ptrace.h> supports syscall fields on FreeBSD. The
# pl_syscall_code member of `struct ptrace_lwpinfo' was added in
# FreeBSD 10.3.
AC_CHECK_MEMBERS([struct ptrace_lwpinfo.pl_syscall_code], [], [],
[#include <sys/ptrace.h>])
# Check if the compiler supports the `long long' type.
AC_CACHE_CHECK([for long long support in compiler], gdb_cv_c_long_long,
[AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
[[extern long long foo;]],
[[switch (foo & 2) { case 0: return 1; }]])],
gdb_cv_c_long_long=yes,
gdb_cv_c_long_long=no)])
if test "$gdb_cv_c_long_long" != yes; then
# libdecnumber requires long long.
AC_MSG_ERROR([Compiler must support long long for GDB.])
fi
# Check if the compiler and runtime support printing decfloats.
AC_CACHE_CHECK([for decfloat support in printf],
gdb_cv_printf_has_decfloat,
[AC_RUN_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
[[char buf[64];
_Decimal32 d32 = 1.2345df;
_Decimal64 d64 = 1.2345dd;
_Decimal128 d128 = 1.2345dl;
sprintf (buf, "Decimal32: %H\nDecimal64: %D\nDecimal128: %DD", d32, d64, d128);
return (strcmp ("Decimal32: 1.2345\nDecimal64: 1.2345\nDecimal128: 1.2345", buf));]])],
gdb_cv_printf_has_decfloat=yes,
gdb_cv_printf_has_decfloat=no,
gdb_cv_printf_has_decfloat=no)])
if test "$gdb_cv_printf_has_decfloat" = yes; then
AC_DEFINE(PRINTF_HAS_DECFLOAT, 1,
[Define to 1 if the "%H, %D and %DD" formats work to print decfloats.])
fi
# Check if the compiler supports the `long double' type. We can't use
# AC_C_LONG_DOUBLE because that one does additional checks on the
# constants defined in <float.h> that fail on some systems,
# e.g. FreeBSD/i386 4.7 and OpenBSD/i386 3.6.
AC_CACHE_CHECK([for long double support in compiler], gdb_cv_c_long_double,
[AC_COMPILE_IFELSE([AC_LANG_SOURCE([[long double foo;]])],
gdb_cv_c_long_double=yes,
gdb_cv_c_long_double=no)])
if test "$gdb_cv_c_long_double" = yes; then
AC_DEFINE(HAVE_LONG_DOUBLE, 1,
[Define to 1 if the compiler supports long double.])
fi
# Check if the compiler and runtime support printing long doubles.
AC_CACHE_CHECK([for long double support in printf],
gdb_cv_printf_has_long_double,
[AC_RUN_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
[[char buf[16];
long double f = 3.141592653;
sprintf (buf, "%Lg", f);
return (strncmp ("3.14159", buf, 7));]])],
gdb_cv_printf_has_long_double=yes,
gdb_cv_printf_has_long_double=no,
gdb_cv_printf_has_long_double=no)])
if test "$gdb_cv_printf_has_long_double" = yes; then
AC_DEFINE(PRINTF_HAS_LONG_DOUBLE, 1,
[Define to 1 if the "%Lg" format works to print long doubles.])
fi
# Check if the compiler and runtime support scanning long doubles.
AC_CACHE_CHECK([for long double support in scanf],
gdb_cv_scanf_has_long_double,
[AC_RUN_IFELSE([AC_LANG_PROGRAM(
[[#include <stdio.h>]],
[[char *buf = "3.141592653";
long double f = 0;
sscanf (buf, "%Lg", &f);
return !(f > 3.14159 && f < 3.14160);]])],
gdb_cv_scanf_has_long_double=yes,
gdb_cv_scanf_has_long_double=no,
gdb_cv_scanf_has_long_double=no)])
if test "$gdb_cv_scanf_has_long_double" = yes; then
AC_DEFINE(SCANF_HAS_LONG_DOUBLE, 1,
[Define to 1 if the "%Lg" format works to scan long doubles.])
fi
case ${host_os} in
aix*)
AC_CACHE_CHECK(
[for -bbigtoc option], [gdb_cv_bigtoc],
[SAVE_LDFLAGS=$LDFLAGS
case $GCC in
yes) gdb_cv_bigtoc=-Wl,-bbigtoc ;;
*) gdb_cv_bigtoc=-bbigtoc ;;
esac
LDFLAGS=$LDFLAGS\ $gdb_cv_bigtoc
AC_LINK_IFELSE(
[AC_LANG_PROGRAM([], [int i;])],
[],
[gdb_cv_bigtoc=]
)
LDFLAGS="${SAVE_LDFLAGS}"]
)
CONFIG_LDFLAGS="${CONFIG_LDFLAGS} ${gdb_cv_bigtoc}"
;;
esac
AC_MSG_CHECKING(for the dynamic export flag)
dynamic_list=false
if test "${gdb_native}" = yes; then
# The dynamically loaded libthread_db needs access to symbols in the gdb
# executable. Older GNU ld supports --export-dynamic but --dynamic-list
# may not be supported there.
old_LDFLAGS="$LDFLAGS"
# Older GNU ld supports --export-dynamic but --dynamic-list it does not.
RDYNAMIC="-Wl,--dynamic-list=${srcdir}/proc-service.list"
LDFLAGS="$LDFLAGS $RDYNAMIC"
if test "${have_libpython}" = no; then
AC_LINK_IFELSE(
[AC_LANG_PROGRAM([], [])],
[dynamic_list=true],
[]
)
else
# Workaround http://bugs.python.org/issue4434 where static
# libpythonX.Y.a would get its symbols required for
# pythonX.Y/lib-dynload/*.so modules hidden by -Wl,--dynamic-list.
# Problem does not happen for the recommended libpythonX.Y.so linkage.
# Note the workaround for Python
# http://bugs.python.org/issue10112 earlier has removed
# -export-dynamic from PYTHON_LIBS. That's exactly what we want
# here too, as otherwise it'd make this -Wl,--dynamic-list test
# always pass.
old_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $PYTHON_CFLAGS"
old_LIBS="$LIBS"
LIBS="$LIBS $PYTHON_LIBS"
old_CPPFLAGS="$CPPFLAGS"
CPPFLAGS="$CPPFLAGS $PYTHON_CPPFLAGS"
AC_RUN_IFELSE(
[AC_LANG_PROGRAM(
[#include "Python.h"],
[int err;
Py_Initialize ();
err = PyRun_SimpleString ("import ctypes\n");
Py_Finalize ();
return err == 0 ? 0 : 1;])],
[dynamic_list=true], [], [true])
LIBS="$old_LIBS"
CFLAGS="$old_CFLAGS"
CPPFLAGS="$old_CPPFLAGS"
fi
LDFLAGS="$old_LDFLAGS"
fi
if $dynamic_list; then
found="-Wl,--dynamic-list"
RDYNAMIC='-Wl,--dynamic-list=$(srcdir)/proc-service.list'
else
found="-rdynamic"
RDYNAMIC="-rdynamic"
fi
AC_SUBST(RDYNAMIC)
AC_MSG_RESULT($found)
AC_CACHE_CHECK(
[whether execinfo.h backtrace is available],
gdb_cv_execinfo_backtrace,
[AC_LINK_IFELSE(
[AC_LANG_PROGRAM(
[
#include <execinfo.h>
],
[
int f;
void *b[[2]];
f = backtrace (b, 2);
backtrace_symbols_fd (b, f, 2);
])],
[gdb_cv_execinfo_backtrace=yes],
[gdb_cv_execinfo_backtrace=no])])
if test "$gdb_cv_execinfo_backtrace" = yes; then
AC_DEFINE(HAVE_EXECINFO_BACKTRACE, 1,
[Define to 1 if execinfo.h backtrace functions are available.])
fi
dnl For certain native configurations, we need to check whether thread
dnl support can be built in or not.
dnl
dnl Note that we only want this if we are both native (host == target),
dnl and not doing a canadian cross build (build == host).
if test "${build}" = "${host}" -a "${host}" = "${target}" ; then
case ${host_os} in
aix*)
AC_MSG_CHECKING(for AiX thread debugging library)
AC_CACHE_VAL(
[gdb_cv_have_aix_thread_debug],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[#include <sys/pthdebug.h>],
[#ifndef PTHDB_VERSION_3
#error
#endif]
)],
[gdb_cv_have_aix_thread_debug=yes],
[gdb_cv_have_aix_thread_debug=no]
)]
)
AC_MSG_RESULT($gdb_cv_have_aix_thread_debug)
if test "$gdb_cv_have_aix_thread_debug" = yes; then
CONFIG_SRCS="${CONFIG_SRCS} aix-thread.c"
CONFIG_OBS="${CONFIG_OBS} aix-thread.o"
LIBS="$LIBS -lpthdebug"
# Older versions of AIX do not provide the declaration for
# the getthrds function (it appears that it was introduced
# with AIX 6.x).
AC_CHECK_DECLS(getthrds, [], [], [[#include <procinfo.h>]])
fi
;;
esac
AC_SUBST(CONFIG_LDFLAGS)
fi
dnl See if we have a thread_db header file that has TD_NOTALLOC and
dnl other error codes.
if test "x$ac_cv_header_thread_db_h" = "xyes"; then
AC_CACHE_CHECK(
[whether <thread_db.h> has TD_NOTALLOC],
[gdb_cv_thread_db_h_has_td_notalloc],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[#include <thread_db.h>],
[int i = TD_NOTALLOC;]
)],
[gdb_cv_thread_db_h_has_td_notalloc=yes],
[gdb_cv_thread_db_h_has_td_notalloc=no]
)]
)
AC_CACHE_CHECK(
[whether <thread_db.h> has TD_VERSION],
[gdb_cv_thread_db_h_has_td_version],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[#include <thread_db.h>],
[int i = TD_VERSION;]
)],
[gdb_cv_thread_db_h_has_td_version=yes],
[gdb_cv_thread_db_h_has_td_version=no]
)]
)
AC_CACHE_CHECK(
[whether <thread_db.h> has TD_NOTLS],
[gdb_cv_thread_db_h_has_td_notls],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[#include <thread_db.h>],
[int i = TD_NOTLS;]
)],
[gdb_cv_thread_db_h_has_td_notls=yes],
[gdb_cv_thread_db_h_has_td_notls=no]
)]
)
fi
if test "x$gdb_cv_thread_db_h_has_td_notalloc" = "xyes"; then
AC_DEFINE(THREAD_DB_HAS_TD_NOTALLOC, 1,
[Define if <thread_db.h> has the TD_NOTALLOC error code.])
fi
if test "x$gdb_cv_thread_db_h_has_td_version" = "xyes"; then
AC_DEFINE(THREAD_DB_HAS_TD_VERSION, 1,
[Define if <thread_db.h> has the TD_VERSION error code.])
fi
if test "x$gdb_cv_thread_db_h_has_td_notls" = "xyes"; then
AC_DEFINE(THREAD_DB_HAS_TD_NOTLS, 1,
[Define if <thread_db.h> has the TD_NOTLS error code.])
fi
dnl Set the host's .gdbinit filename.
case $host_os in
go32* | *djgpp*)
gdbinit=gdb.ini
;;
*)
gdbinit=.gdbinit
;;
esac
AC_DEFINE_UNQUOTED(GDBINIT,"$gdbinit",[The .gdbinit filename.])
dnl Set the host's .gdbearlyinit filename
AC_DEFINE_UNQUOTED(GDBEARLYINIT,".gdbearlyinit",[The .gdbearlyinit filename.])
dnl Handle optional features that can be enabled.
# Support for --with-sysroot is a copy of GDB_AC_WITH_DIR,
# except that the argument to --with-sysroot is optional.
# --with-sysroot (or --with-sysroot=yes) sets the default sysroot path.
if test "x$with_sysroot" = xyes; then
with_sysroot="${exec_prefix}/${target_alias}/sys-root"
fi
AC_ARG_WITH(sysroot,
AS_HELP_STRING([--with-sysroot@<:@=DIR@:>@],
[search for usr/lib et al within DIR]),
[TARGET_SYSTEM_ROOT=$withval], [TARGET_SYSTEM_ROOT=])
AC_DEFINE_DIR(TARGET_SYSTEM_ROOT, TARGET_SYSTEM_ROOT,
[search for usr/lib et al within DIR])
AC_SUBST(TARGET_SYSTEM_ROOT)
GDB_AC_DEFINE_RELOCATABLE(TARGET_SYSTEM_ROOT, sysroot, ${ac_define_dir})
GDB_AC_WITH_DIR(SYSTEM_GDBINIT, system-gdbinit,
[automatically load a system-wide gdbinit file],
[])
GDB_AC_WITH_DIR(SYSTEM_GDBINIT_DIR, system-gdbinit-dir,
[automatically load system-wide gdbinit files from this directory],
[])
AM_GDB_COMPILER_TYPE
AM_GDB_WARNINGS
AM_GDB_UBSAN
# In the Cygwin environment, we need some additional flags.
AC_CACHE_CHECK([for cygwin], gdb_cv_os_cygwin,
[AC_EGREP_CPP(^lose$, [
#if defined (__CYGWIN__) || defined (__CYGWIN32__)
lose
#endif],[gdb_cv_os_cygwin=yes],[gdb_cv_os_cygwin=no])])
dnl Figure out which of the many generic ser-*.c files the _host_ supports.
SER_HARDWIRE="ser-base.o ser-unix.o ser-pipe.o ser-tcp.o"
case ${host} in
*go32* ) SER_HARDWIRE=ser-go32.o ;;
*djgpp* ) SER_HARDWIRE=ser-go32.o ;;
*mingw32*) SER_HARDWIRE="ser-base.o ser-tcp.o ser-mingw.o" ;;
*) SER_HARDWIRE="$SER_HARDWIRE ser-uds.o" ;;
esac
AC_SUBST(SER_HARDWIRE)
# libreadline needs libuser32.a in a cygwin environment
WIN32LIBS=
if test x"$gdb_cv_os_cygwin" = xyes; then
WIN32LIBS="-luser32"
case "${target}" in
*cygwin*) WIN32LIBS="$WIN32LIBS -limagehlp"
;;
esac
fi
# The ser-tcp.c module requires sockets.
# Note that WIN32APILIBS is set by GDB_AC_COMMON.
WIN32LIBS="$WIN32LIBS $WIN32APILIBS"
# Add ELF support to GDB, but only if BFD includes ELF support.
GDB_AC_CHECK_BFD([for ELF support in BFD], gdb_cv_var_elf,
[bfd_get_elf_phdr_upper_bound (NULL)], elf-bfd.h)
if test "$gdb_cv_var_elf" = yes; then
CONFIG_OBS="$CONFIG_OBS elfread.o stap-probe.o dtrace-probe.o \
gcore-elf.o elf-none-tdep.o"
AC_DEFINE(HAVE_ELF, 1,
[Define if ELF support should be included.])
# -ldl is provided by bfd/Makfile.am (LIBDL) <PLUGINS>.
if test "$plugins" = "yes"; then
AC_SEARCH_LIBS(dlopen, dl)
fi
fi
# Add macho support to GDB, but only if BFD includes it.
GDB_AC_CHECK_BFD([for Mach-O support in BFD], gdb_cv_var_macho,
[bfd_mach_o_lookup_command (NULL, 0, NULL)], mach-o.h)
if test "$gdb_cv_var_macho" = yes; then
CONFIG_OBS="$CONFIG_OBS machoread.o"
fi
# Add any host-specific objects to GDB.
CONFIG_OBS="${CONFIG_OBS} ${gdb_host_obs}"
# If building on ELF, look for lzma support for embedded compressed debug info.
if test "$gdb_cv_var_elf" = yes; then
AC_ARG_WITH(lzma,
AS_HELP_STRING([--with-lzma], [support lzma compression (auto/yes/no)]),
[], [with_lzma=auto])
AC_MSG_CHECKING([whether to use lzma])
AC_MSG_RESULT([$with_lzma])
if test "${with_lzma}" != no; then
AC_LIB_HAVE_LINKFLAGS([lzma], [], [#include "lzma.h"],
[lzma_index_iter iter;
lzma_index_iter_init (&iter, 0);
lzma_mf_is_supported (LZMA_MF_HC3);])
if test "$HAVE_LIBLZMA" != yes; then
if test "$with_lzma" = yes; then
AC_MSG_ERROR([missing liblzma for --with-lzma])
fi
fi
fi
fi
LIBGUI="../libgui/src/libgui.a"
GUI_CFLAGS_X="-I${srcdir}/../libgui/src"
AC_SUBST(LIBGUI)
AC_SUBST(GUI_CFLAGS_X)
WIN32LDAPP=
AC_SUBST(WIN32LIBS)
AC_SUBST(WIN32LDAPP)
case "${host}" in
*-*-cygwin* | *-*-mingw* )
configdir="win"
;;
*)
configdir="unix"
;;
esac
GDBTKLIBS=
if test "${enable_gdbtk}" = "yes"; then
# Gdbtk must have an absolute path to srcdir in order to run
# properly when not installed.
here=`pwd`
cd ${srcdir}
GDBTK_SRC_DIR=`pwd`
cd $here
SC_PATH_TCLCONFIG
# If $no_tk is nonempty, then we can't do Tk, and there is no
# point to doing Tcl.
SC_PATH_TKCONFIG
if test -z "${no_tcl}" -a -z "${no_tk}"; then
SC_LOAD_TCLCONFIG
# Check for in-tree tcl
here=`pwd`
cd ${srcdir}/..
topdir=`pwd`
cd ${here}
intree="no"
if test "${TCL_SRC_DIR}" = "${topdir}/tcl"; then
intree="yes"
fi
# Find Tcl private headers
if test x"${intree}" = xno; then
CY_AC_TCL_PRIVATE_HEADERS
TCL_INCLUDE="${TCL_INCLUDE_SPEC} ${TCL_PRIVATE_INCLUDE}"
TCL_LIBRARY="${TCL_LIB_SPEC}"
TCL_DEPS=""
else
# If building tcl in the same src tree, private headers
# are not needed, but we need to be sure to use the right
# headers library
TCL_INCLUDE="-I${TCL_SRC_DIR}/generic"
TCL_LIBRARY="${TCL_BUILD_LIB_SPEC}"
TCL_DEPS="../tcl/${configdir}${TCL_LIB_FILE}"
fi
AC_SUBST(TCL_INCLUDE)
AC_SUBST(TCL_LIBRARY)
AC_SUBST(TCL_DEPS)
SC_LOAD_TKCONFIG
# Check for in-tree Tk
intree="no"
if test "${TK_SRC_DIR}" = "${topdir}/tk"; then
intree="yes"
fi
# Find Tk private headers
if test x"${intree}" = xno; then
CY_AC_TK_PRIVATE_HEADERS
TK_INCLUDE="${TK_INCLUDE_SPEC} ${TK_PRIVATE_INCLUDE}"
TK_LIBRARY=${TK_LIB_SPEC}
TK_DEPS=""
else
TK_INCLUDE="-I${TK_SRC_DIR}/generic"
TK_LIBRARY="${TK_BUILD_LIB_SPEC}"
TK_DEPS="../tk/${configdir}/${TK_LIB_FILE}"
fi
AC_SUBST(TK_INCLUDE)
AC_SUBST(TK_LIBRARY)
AC_SUBST(TK_DEPS)
AC_SUBST(TK_XINCLUDES)
ENABLE_CFLAGS="${ENABLE_CFLAGS} \$(SUBDIR_GDBTK_CFLAGS)"
# Include some libraries that Tcl and Tk want.
TCL_LIBS='$(LIBGUI) $(TK) $(TCL) $(X11_LDFLAGS) $(X11_LIBS)'
# Yes, the ordering seems wrong here. But it isn't.
# TK_LIBS is the list of libraries that need to be linked
# after Tcl/Tk. Note that this isn't put into LIBS. If it
# were in LIBS then any link tests after this point would
# try to include things like `$(LIBGUI)', which wouldn't work.
GDBTKLIBS="${TCL_LIBS} ${TK_LIBS}"
CONFIG_OBS="${CONFIG_OBS} \$(SUBDIR_GDBTK_OBS)"
CONFIG_DEPS="${CONFIG_DEPS} \$(SUBDIR_GDBTK_DEPS)"
CONFIG_SRCS="${CONFIG_SRCS} \$(SUBDIR_GDBTK_SRCS)"
CONFIG_ALL="${CONFIG_ALL} all-gdbtk"
CONFIG_CLEAN="${CONFIG_CLEAN} clean-gdbtk"
CONFIG_INSTALL="${CONFIG_INSTALL} install-gdbtk"
CONFIG_UNINSTALL="${CONFIG_UNINSTALL} uninstall-gdbtk"
if test x"$gdb_cv_os_cygwin" = xyes; then
WIN32LIBS="${WIN32LIBS} -lshell32 -lgdi32 -lcomdlg32 -ladvapi32"
WIN32LDAPP="-Wl,--subsystem,console"
CONFIG_OBS="${CONFIG_OBS} gdbres.o"
fi
AC_CONFIG_SUBDIRS(gdbtk)
fi
fi
AC_SUBST(X_CFLAGS)
AC_SUBST(X_LDFLAGS)
AC_SUBST(X_LIBS)
AC_SUBST(GDBTKLIBS)
AC_SUBST(GDBTK_CFLAGS)
AC_SUBST(GDBTK_SRC_DIR)
AC_PATH_X
# Unlike the sim directory, whether a simulator is linked is controlled by
# presence of a gdb_sim definition in the target configure.tgt entry.
# This code just checks for a few cases where we'd like to ignore those
# definitions, even when they're present in the '.mt' file. These cases
# are when --disable-sim is specified, or if the simulator directory is
# not part of the source tree.
#
AC_ARG_ENABLE(sim,
AS_HELP_STRING([--enable-sim], [link gdb with simulator]),
[echo "enable_sim = $enable_sim";
echo "enableval = ${enableval}";
case "${enableval}" in
yes) ignore_sim=false ;;
no) ignore_sim=true ;;
*) ignore_sim=false ;;
esac],
[ignore_sim=false])
if test ! -d "${srcdir}/../sim"; then
ignore_sim=true
fi
SIM=
SIM_OBS=
if test "${ignore_sim}" = "false"; then
if test x"${gdb_sim}" != x ; then
SIM="${gdb_sim}"
SIM_OBS="remote-sim.o"
# Some tdep code should only be compiled in when the ppc sim is
# built. PR sim/13418.
case $target in
powerpc*-*-*)
AC_DEFINE(WITH_PPC_SIM, 1, [Define if the PPC simulator is being linked in.])
;;
esac
fi
fi
AC_SUBST(SIM)
AC_SUBST(SIM_OBS)
AC_SUBST(ENABLE_CFLAGS)
AC_SUBST(PROFILE_CFLAGS)
AC_SUBST(CONFIG_OBS)
AC_SUBST(CONFIG_DEPS)
AC_SUBST(CONFIG_SRCS)
AC_SUBST(CONFIG_ALL)
AC_SUBST(CONFIG_CLEAN)
AC_SUBST(CONFIG_INSTALL)
AC_SUBST(CONFIG_UNINSTALL)
# List of host floatformats.
AC_DEFINE_UNQUOTED(GDB_HOST_FLOAT_FORMAT,$gdb_host_float_format,[Host float floatformat])
AC_DEFINE_UNQUOTED(GDB_HOST_DOUBLE_FORMAT,$gdb_host_double_format,[Host double floatformat])
AC_DEFINE_UNQUOTED(GDB_HOST_LONG_DOUBLE_FORMAT,$gdb_host_long_double_format,[Host long double floatformat])
# target_subdir is used by the testsuite to find the target libraries.
target_subdir=
if test "${host}" != "${target}"; then
target_subdir="${target_alias}/"
fi
AC_SUBST(target_subdir)
# Import nat definitions.
nat_makefile_frag=/dev/null
if test "${gdb_native}" = "yes"; then
. ${srcdir}/configure.nat
nativefile=$NAT_FILE
fi
AC_SUBST(NAT_FILE)
AC_SUBST(NATDEPFILES)
AC_SUBST(NAT_CDEPS)
AC_SUBST(LOADLIBES)
AC_SUBST(MH_CFLAGS)
AC_SUBST(XM_CLIBS)
AC_SUBST(NAT_GENERATED_FILES)
AC_SUBST(HAVE_NATIVE_GCORE_HOST)
AC_SUBST_FILE(nat_makefile_frag)
if test x"${gdb_osabi}" != x ; then
AC_DEFINE_UNQUOTED(GDB_OSABI_DEFAULT, $gdb_osabi,
[Define to the default OS ABI for this configuration.])
fi
# Setup possible use of libbacktrace.
AC_ARG_ENABLE([libbacktrace],
[AS_HELP_STRING([--enable-libbacktrace],
[use libbacktrace to write a backtrace after a fatal signal.])],
[GDB_CHECK_YES_NO_VAL([$enableval], [--enable-libbacktrace])],
[enable_libbacktrace=yes])
if test "${enable_libbacktrace}" = "yes"; then
LIBBACKTRACE_INC="-I$srcdir/../libbacktrace/ -I../libbacktrace/"
LIBBACKTRACE_LIB=../libbacktrace/libbacktrace.la
AC_DEFINE(HAVE_LIBBACKTRACE, 1, [Define if libbacktrace is being used.])
else
LIBBACKTRACE_INC=
LIBBACKTRACE_LIB=
fi
AC_SUBST(LIBBACKTRACE_INC)
AC_SUBST(LIBBACKTRACE_LIB)
# Check for babeltrace and babeltrace-ctf
AC_ARG_WITH(babeltrace,
AS_HELP_STRING([--with-babeltrace], [include babeltrace support (auto/yes/no)]),
[], [with_babeltrace=auto])
AC_MSG_CHECKING([whether to use babeltrace])
AC_MSG_RESULT([$with_babeltrace])
if test "x$with_babeltrace" = "xno"; then
AC_MSG_WARN([babletrace support disabled; GDB is unable to read CTF data.])
else
# Append -Werror to CFLAGS so that configure can catch the warning
# "assignment from incompatible pointer type", which is related to
# the babeltrace change from 1.0.3 to 1.1.0. Babeltrace 1.1.0 works
# in GDB, while babeltrace 1.0.3 is broken.
# AC_LIB_HAVE_LINKFLAGS may modify CPPFLAGS in it, so it should be
# safe to save and restore CFLAGS here.
saved_CFLAGS=$CFLAGS
CFLAGS="$CFLAGS -Werror"
AC_LIB_HAVE_LINKFLAGS([babeltrace], [babeltrace-ctf],
[#include <babeltrace/babeltrace.h>
#include <babeltrace/ctf/events.h>
#include <babeltrace/ctf/iterator.h>],
[struct bt_iter_pos *pos = bt_iter_get_pos (bt_ctf_get_iter (NULL));
struct bt_ctf_event *event = NULL;
const struct bt_definition *scope;
pos->type = BT_SEEK_BEGIN;
bt_iter_set_pos (bt_ctf_get_iter (NULL), pos);
scope = bt_ctf_get_top_level_scope (event,
BT_STREAM_EVENT_HEADER);
bt_ctf_get_uint64 (bt_ctf_get_field (event, scope, "id"));
])
CFLAGS=$saved_CFLAGS
if test "$HAVE_LIBBABELTRACE" != yes; then
if test "$with_babeltrace" = yes; then
AC_MSG_ERROR([babeltrace is missing or unusable])
else
AC_MSG_WARN([babeltrace is missing or unusable; GDB is unable to read CTF data.])
fi
fi
fi
GCC_ENABLE([libctf], [yes], [], [Handle .ctf type-info sections])
if test "${enable_libctf}" = yes; then
AC_DEFINE(ENABLE_LIBCTF, 1, [Handle .ctf type-info sections])
LIBCTF="../libctf/libctf.la"
CTF_DEPS="../libctf/libctf.la"
else
LIBCTF=
CTF_DEPS=
fi
AC_SUBST(LIBCTF)
AC_SUBST(CTF_DEPS)
# If nativefile (NAT_FILE) is not set in configure.nat, we link to an
# empty version.
NM_H=
rm -f nm.h
if test "${nativefile}" != ""; then
case "${nativefile}" in
nm-*.h ) GDB_NM_FILE="config/${gdb_host_cpu}/${nativefile}" ;;
* ) GDB_NM_FILE="${nativefile}"
esac
AC_CONFIG_LINKS([nm.h:$GDB_NM_FILE], [echo > stamp-nmh],
[GDB_NM_FILE=$GDB_NM_FILE])
AC_DEFINE_UNQUOTED(GDB_NM_FILE, "${GDB_NM_FILE}", [nativefile])
NM_H=nm.h
fi
AC_SUBST(GDB_NM_FILE)
AC_SUBST(NM_H)
dnl Add dependency for xsltproc if building with maintainer-mode enabled.
AC_PATH_PROGS(XSLTPROC, xsltproc, missing)
if test "x$USE_MAINTAINER_MODE" = xyes; then
if test "${XSLTPROC}" = missing; then
AC_MSG_ERROR(unable to find xsltproc. maintainer-mode requires xsltproc.)
fi
fi
AC_SUBST(XSLTPROC)
dnl Check for exe extension set on certain hosts (e.g. Win32)
AC_EXEEXT
dnl Detect the character set used by this host.
dnl At the moment, we just assume it's UTF-8.
AC_DEFINE(GDB_DEFAULT_HOST_CHARSET, "UTF-8",
[Define to be a string naming the default host character set.])
GDB_AC_SELFTEST([
CONFIG_OBS="$CONFIG_OBS \$(SELFTESTS_OBS)"
CONFIG_SRCS="$CONFIG_SRCS \$(SELFTESTS_SRCS)"
])
GDB_AC_TRANSFORM([gdb], [GDB_TRANSFORM_NAME])
GDB_AC_TRANSFORM([gcore], [GCORE_TRANSFORM_NAME])
AC_CONFIG_FILES([gcore], [chmod +x gcore])
AC_CONFIG_FILES([Makefile gdb-gdb.gdb gdb-gdb.py doc/Makefile data-directory/Makefile])
AC_OUTPUT
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