forked from Imagelibrary/binutils-gdb
Add configure check for std::thread
This adds a configure check for std::thread. This is needed because std::thread is not available on some systems, like some versions of mingw and DJGPP. This also adds configury to make sure that a threaded gdb links against the correct threading library (-lpthread or the like), and passes the right flags (e.g., -pthread) to the compilations. Note that this also links gdbserver against the thread library. This is not strictly necessary at this point in the series, but a later patch will change gdbsupport to use pthread_sigmask, at which point this will be needed. gdb/ChangeLog 2019-11-26 Tom Tromey <tom@tromey.com> * acinclude.m4: Include ax_pthread.m4. * Makefile.in (PTHREAD_CFLAGS, PTHREAD_LIBS): New variables. (INTERNAL_CFLAGS_BASE): Use PTHREAD_CFLAGS. (CLIBS): Use PTHREAD_LIBS. (aclocal_m4_deps): Add ax_pthread.m4. * config.in, configure: Rebuild. * gdbsupport/common.m4 (GDB_AC_COMMON): Check for std::thread. gdb/gdbserver/ChangeLog 2019-11-26 Tom Tromey <tom@tromey.com> * Makefile.in (PTHREAD_CFLAGS, PTHREAD_LIBS): New variables. (INTERNAL_CFLAGS_BASE): Use PTHREAD_CFLAGS. (GDBSERVER_LIBS): Use PTHREAD_LIBS. * acinclude.m4: Include ax_pthread.m4. * config.in, configure: Rebuild. Change-Id: I00ec55db6077f2615421a93461fc3be57e916aa0
This commit is contained in:
Tom Tromey
767
gdb/configure
vendored
767
gdb/configure
vendored
@@ -702,6 +702,11 @@ SYSTEM_GDBINIT
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TARGET_SYSTEM_ROOT
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CONFIG_LDFLAGS
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RDYNAMIC
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PTHREAD_CFLAGS
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PTHREAD_LIBS
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PTHREAD_CC
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ax_pthread_config
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SED
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ALLOCA
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LTLIBIPT
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LIBIPT
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@@ -13126,6 +13131,75 @@ _ACEOF
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for a sed that does not truncate output" >&5
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$as_echo_n "checking for a sed that does not truncate output... " >&6; }
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if ${ac_cv_path_SED+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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ac_script=s/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb/
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for ac_i in 1 2 3 4 5 6 7; do
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ac_script="$ac_script$as_nl$ac_script"
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done
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echo "$ac_script" 2>/dev/null | sed 99q >conftest.sed
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{ ac_script=; unset ac_script;}
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if test -z "$SED"; then
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ac_path_SED_found=false
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# Loop through the user's path and test for each of PROGNAME-LIST
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as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
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for as_dir in $PATH
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do
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IFS=$as_save_IFS
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test -z "$as_dir" && as_dir=.
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for ac_prog in sed gsed; do
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for ac_exec_ext in '' $ac_executable_extensions; do
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ac_path_SED="$as_dir/$ac_prog$ac_exec_ext"
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as_fn_executable_p "$ac_path_SED" || continue
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# Check for GNU ac_path_SED and select it if it is found.
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# Check for GNU $ac_path_SED
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case `"$ac_path_SED" --version 2>&1` in
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*GNU*)
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ac_cv_path_SED="$ac_path_SED" ac_path_SED_found=:;;
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*)
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ac_count=0
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$as_echo_n 0123456789 >"conftest.in"
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while :
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do
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cat "conftest.in" "conftest.in" >"conftest.tmp"
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mv "conftest.tmp" "conftest.in"
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cp "conftest.in" "conftest.nl"
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$as_echo '' >> "conftest.nl"
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"$ac_path_SED" -f conftest.sed < "conftest.nl" >"conftest.out" 2>/dev/null || break
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diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
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as_fn_arith $ac_count + 1 && ac_count=$as_val
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if test $ac_count -gt ${ac_path_SED_max-0}; then
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# Best one so far, save it but keep looking for a better one
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ac_cv_path_SED="$ac_path_SED"
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ac_path_SED_max=$ac_count
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fi
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# 10*(2^10) chars as input seems more than enough
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test $ac_count -gt 10 && break
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done
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rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
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esac
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$ac_path_SED_found && break 3
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done
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done
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done
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IFS=$as_save_IFS
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if test -z "$ac_cv_path_SED"; then
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as_fn_error $? "no acceptable sed could be found in \$PATH" "$LINENO" 5
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fi
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else
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ac_cv_path_SED=$SED
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fi
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_SED" >&5
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$as_echo "$ac_cv_path_SED" >&6; }
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SED="$ac_cv_path_SED"
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rm -f conftest.sed
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for ANSI C header files" >&5
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$as_echo_n "checking for ANSI C header files... " >&6; }
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@@ -13511,6 +13585,699 @@ cat >>confdefs.h <<_ACEOF
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_ACEOF
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# Check for std::thread. This does not work on some platforms, like
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# mingw and DJGPP.
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ac_ext=cpp
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ac_cpp='$CXXCPP $CPPFLAGS'
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ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
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ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
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ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
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ac_ext=c
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ac_cpp='$CPP $CPPFLAGS'
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ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
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ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
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ac_compiler_gnu=$ac_cv_c_compiler_gnu
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ax_pthread_ok=no
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# We used to check for pthread.h first, but this fails if pthread.h
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# requires special compiler flags (e.g. on Tru64 or Sequent).
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# It gets checked for in the link test anyway.
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# First of all, check if the user has set any of the PTHREAD_LIBS,
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# etcetera environment variables, and if threads linking works using
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# them:
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if test "x$PTHREAD_CFLAGS$PTHREAD_LIBS" != "x"; then
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ax_pthread_save_CC="$CC"
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ax_pthread_save_CFLAGS="$CFLAGS"
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ax_pthread_save_LIBS="$LIBS"
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if test "x$PTHREAD_CC" != "x"; then :
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CC="$PTHREAD_CC"
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fi
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CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
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LIBS="$PTHREAD_LIBS $LIBS"
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for pthread_join using $CC $PTHREAD_CFLAGS $PTHREAD_LIBS" >&5
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$as_echo_n "checking for pthread_join using $CC $PTHREAD_CFLAGS $PTHREAD_LIBS... " >&6; }
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cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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/* end confdefs.h. */
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/* Override any GCC internal prototype to avoid an error.
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Use char because int might match the return type of a GCC
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builtin and then its argument prototype would still apply. */
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#ifdef __cplusplus
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extern "C"
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#endif
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char pthread_join ();
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int
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main ()
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{
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return pthread_join ();
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;
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return 0;
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}
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_ACEOF
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if ac_fn_c_try_link "$LINENO"; then :
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ax_pthread_ok=yes
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fi
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rm -f core conftest.err conftest.$ac_objext \
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conftest$ac_exeext conftest.$ac_ext
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_pthread_ok" >&5
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$as_echo "$ax_pthread_ok" >&6; }
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if test "x$ax_pthread_ok" = "xno"; then
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PTHREAD_LIBS=""
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PTHREAD_CFLAGS=""
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fi
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CC="$ax_pthread_save_CC"
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CFLAGS="$ax_pthread_save_CFLAGS"
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LIBS="$ax_pthread_save_LIBS"
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fi
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# We must check for the threads library under a number of different
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# names; the ordering is very important because some systems
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# (e.g. DEC) have both -lpthread and -lpthreads, where one of the
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# libraries is broken (non-POSIX).
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# Create a list of thread flags to try. Items starting with a "-" are
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# C compiler flags, and other items are library names, except for "none"
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# which indicates that we try without any flags at all, and "pthread-config"
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# which is a program returning the flags for the Pth emulation library.
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ax_pthread_flags="pthreads none -Kthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config"
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# The ordering *is* (sometimes) important. Some notes on the
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# individual items follow:
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# pthreads: AIX (must check this before -lpthread)
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# none: in case threads are in libc; should be tried before -Kthread and
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# other compiler flags to prevent continual compiler warnings
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# -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h)
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# -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads), Tru64
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# (Note: HP C rejects this with "bad form for `-t' option")
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# -pthreads: Solaris/gcc (Note: HP C also rejects)
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# -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it
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# doesn't hurt to check since this sometimes defines pthreads and
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# -D_REENTRANT too), HP C (must be checked before -lpthread, which
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# is present but should not be used directly; and before -mthreads,
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# because the compiler interprets this as "-mt" + "-hreads")
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# -mthreads: Mingw32/gcc, Lynx/gcc
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# pthread: Linux, etcetera
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# --thread-safe: KAI C++
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# pthread-config: use pthread-config program (for GNU Pth library)
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case $host_os in
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freebsd*)
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# -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able)
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# lthread: LinuxThreads port on FreeBSD (also preferred to -pthread)
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ax_pthread_flags="-kthread lthread $ax_pthread_flags"
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;;
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hpux*)
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# From the cc(1) man page: "[-mt] Sets various -D flags to enable
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# multi-threading and also sets -lpthread."
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ax_pthread_flags="-mt -pthread pthread $ax_pthread_flags"
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;;
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openedition*)
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# IBM z/OS requires a feature-test macro to be defined in order to
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# enable POSIX threads at all, so give the user a hint if this is
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# not set. (We don't define these ourselves, as they can affect
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# other portions of the system API in unpredictable ways.)
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cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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/* end confdefs.h. */
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# if !defined(_OPEN_THREADS) && !defined(_UNIX03_THREADS)
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AX_PTHREAD_ZOS_MISSING
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# endif
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_ACEOF
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if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
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$EGREP "AX_PTHREAD_ZOS_MISSING" >/dev/null 2>&1; then :
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{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: IBM z/OS requires -D_OPEN_THREADS or -D_UNIX03_THREADS to enable pthreads support." >&5
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$as_echo "$as_me: WARNING: IBM z/OS requires -D_OPEN_THREADS or -D_UNIX03_THREADS to enable pthreads support." >&2;}
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||||
fi
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rm -f conftest*
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||||
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||||
;;
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||||
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||||
solaris*)
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||||
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||||
# On Solaris (at least, for some versions), libc contains stubbed
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||||
# (non-functional) versions of the pthreads routines, so link-based
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# tests will erroneously succeed. (N.B.: The stubs are missing
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# pthread_cleanup_push, or rather a function called by this macro,
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# so we could check for that, but who knows whether they'll stub
|
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# that too in a future libc.) So we'll check first for the
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# standard Solaris way of linking pthreads (-mt -lpthread).
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ax_pthread_flags="-mt,pthread pthread $ax_pthread_flags"
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;;
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esac
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# GCC generally uses -pthread, or -pthreads on some platforms (e.g. SPARC)
|
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|
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if test "x$GCC" = "xyes"; then :
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ax_pthread_flags="-pthread -pthreads $ax_pthread_flags"
|
||||
fi
|
||||
|
||||
# The presence of a feature test macro requesting re-entrant function
|
||||
# definitions is, on some systems, a strong hint that pthreads support is
|
||||
# correctly enabled
|
||||
|
||||
case $host_os in
|
||||
darwin* | hpux* | linux* | osf* | solaris*)
|
||||
ax_pthread_check_macro="_REENTRANT"
|
||||
;;
|
||||
|
||||
aix*)
|
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ax_pthread_check_macro="_THREAD_SAFE"
|
||||
;;
|
||||
|
||||
*)
|
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ax_pthread_check_macro="--"
|
||||
;;
|
||||
esac
|
||||
if test "x$ax_pthread_check_macro" = "x--"; then :
|
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ax_pthread_check_cond=0
|
||||
else
|
||||
ax_pthread_check_cond="!defined($ax_pthread_check_macro)"
|
||||
fi
|
||||
|
||||
# Are we compiling with Clang?
|
||||
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC is Clang" >&5
|
||||
$as_echo_n "checking whether $CC is Clang... " >&6; }
|
||||
if ${ax_cv_PTHREAD_CLANG+:} false; then :
|
||||
$as_echo_n "(cached) " >&6
|
||||
else
|
||||
ax_cv_PTHREAD_CLANG=no
|
||||
# Note that Autoconf sets GCC=yes for Clang as well as GCC
|
||||
if test "x$GCC" = "xyes"; then
|
||||
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
|
||||
/* end confdefs.h. */
|
||||
/* Note: Clang 2.7 lacks __clang_[a-z]+__ */
|
||||
# if defined(__clang__) && defined(__llvm__)
|
||||
AX_PTHREAD_CC_IS_CLANG
|
||||
# endif
|
||||
|
||||
_ACEOF
|
||||
if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
|
||||
$EGREP "AX_PTHREAD_CC_IS_CLANG" >/dev/null 2>&1; then :
|
||||
ax_cv_PTHREAD_CLANG=yes
|
||||
fi
|
||||
rm -f conftest*
|
||||
|
||||
fi
|
||||
|
||||
fi
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_PTHREAD_CLANG" >&5
|
||||
$as_echo "$ax_cv_PTHREAD_CLANG" >&6; }
|
||||
ax_pthread_clang="$ax_cv_PTHREAD_CLANG"
|
||||
|
||||
ax_pthread_clang_warning=no
|
||||
|
||||
# Clang needs special handling, because older versions handle the -pthread
|
||||
# option in a rather... idiosyncratic way
|
||||
|
||||
if test "x$ax_pthread_clang" = "xyes"; then
|
||||
|
||||
# Clang takes -pthread; it has never supported any other flag
|
||||
|
||||
# (Note 1: This will need to be revisited if a system that Clang
|
||||
# supports has POSIX threads in a separate library. This tends not
|
||||
# to be the way of modern systems, but it's conceivable.)
|
||||
|
||||
# (Note 2: On some systems, notably Darwin, -pthread is not needed
|
||||
# to get POSIX threads support; the API is always present and
|
||||
# active. We could reasonably leave PTHREAD_CFLAGS empty. But
|
||||
# -pthread does define _REENTRANT, and while the Darwin headers
|
||||
# ignore this macro, third-party headers might not.)
|
||||
|
||||
PTHREAD_CFLAGS="-pthread"
|
||||
PTHREAD_LIBS=
|
||||
|
||||
ax_pthread_ok=yes
|
||||
|
||||
# However, older versions of Clang make a point of warning the user
|
||||
# that, in an invocation where only linking and no compilation is
|
||||
# taking place, the -pthread option has no effect ("argument unused
|
||||
# during compilation"). They expect -pthread to be passed in only
|
||||
# when source code is being compiled.
|
||||
#
|
||||
# Problem is, this is at odds with the way Automake and most other
|
||||
# C build frameworks function, which is that the same flags used in
|
||||
# compilation (CFLAGS) are also used in linking. Many systems
|
||||
# supported by AX_PTHREAD require exactly this for POSIX threads
|
||||
# support, and in fact it is often not straightforward to specify a
|
||||
# flag that is used only in the compilation phase and not in
|
||||
# linking. Such a scenario is extremely rare in practice.
|
||||
#
|
||||
# Even though use of the -pthread flag in linking would only print
|
||||
# a warning, this can be a nuisance for well-run software projects
|
||||
# that build with -Werror. So if the active version of Clang has
|
||||
# this misfeature, we search for an option to squash it.
|
||||
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether Clang needs flag to prevent \"argument unused\" warning when linking with -pthread" >&5
|
||||
$as_echo_n "checking whether Clang needs flag to prevent \"argument unused\" warning when linking with -pthread... " >&6; }
|
||||
if ${ax_cv_PTHREAD_CLANG_NO_WARN_FLAG+:} false; then :
|
||||
$as_echo_n "(cached) " >&6
|
||||
else
|
||||
ax_cv_PTHREAD_CLANG_NO_WARN_FLAG=unknown
|
||||
# Create an alternate version of $ac_link that compiles and
|
||||
# links in two steps (.c -> .o, .o -> exe) instead of one
|
||||
# (.c -> exe), because the warning occurs only in the second
|
||||
# step
|
||||
ax_pthread_save_ac_link="$ac_link"
|
||||
ax_pthread_sed='s/conftest\.\$ac_ext/conftest.$ac_objext/g'
|
||||
ax_pthread_link_step=`$as_echo "$ac_link" | sed "$ax_pthread_sed"`
|
||||
ax_pthread_2step_ac_link="($ac_compile) && (echo ==== >&5) && ($ax_pthread_link_step)"
|
||||
ax_pthread_save_CFLAGS="$CFLAGS"
|
||||
for ax_pthread_try in '' -Qunused-arguments -Wno-unused-command-line-argument unknown; do
|
||||
if test "x$ax_pthread_try" = "xunknown"; then :
|
||||
break
|
||||
fi
|
||||
CFLAGS="-Werror -Wunknown-warning-option $ax_pthread_try -pthread $ax_pthread_save_CFLAGS"
|
||||
ac_link="$ax_pthread_save_ac_link"
|
||||
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
|
||||
/* end confdefs.h. */
|
||||
int main(void){return 0;}
|
||||
_ACEOF
|
||||
if ac_fn_c_try_link "$LINENO"; then :
|
||||
ac_link="$ax_pthread_2step_ac_link"
|
||||
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
|
||||
/* end confdefs.h. */
|
||||
int main(void){return 0;}
|
||||
_ACEOF
|
||||
if ac_fn_c_try_link "$LINENO"; then :
|
||||
break
|
||||
fi
|
||||
rm -f core conftest.err conftest.$ac_objext \
|
||||
conftest$ac_exeext conftest.$ac_ext
|
||||
|
||||
fi
|
||||
rm -f core conftest.err conftest.$ac_objext \
|
||||
conftest$ac_exeext conftest.$ac_ext
|
||||
done
|
||||
ac_link="$ax_pthread_save_ac_link"
|
||||
CFLAGS="$ax_pthread_save_CFLAGS"
|
||||
if test "x$ax_pthread_try" = "x"; then :
|
||||
ax_pthread_try=no
|
||||
fi
|
||||
ax_cv_PTHREAD_CLANG_NO_WARN_FLAG="$ax_pthread_try"
|
||||
|
||||
fi
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_PTHREAD_CLANG_NO_WARN_FLAG" >&5
|
||||
$as_echo "$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG" >&6; }
|
||||
|
||||
case "$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG" in
|
||||
no | unknown) ;;
|
||||
*) PTHREAD_CFLAGS="$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG $PTHREAD_CFLAGS" ;;
|
||||
esac
|
||||
|
||||
fi # $ax_pthread_clang = yes
|
||||
|
||||
if test "x$ax_pthread_ok" = "xno"; then
|
||||
for ax_pthread_try_flag in $ax_pthread_flags; do
|
||||
|
||||
case $ax_pthread_try_flag in
|
||||
none)
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether pthreads work without any flags" >&5
|
||||
$as_echo_n "checking whether pthreads work without any flags... " >&6; }
|
||||
;;
|
||||
|
||||
-mt,pthread)
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether pthreads work with -mt -lpthread" >&5
|
||||
$as_echo_n "checking whether pthreads work with -mt -lpthread... " >&6; }
|
||||
PTHREAD_CFLAGS="-mt"
|
||||
PTHREAD_LIBS="-lpthread"
|
||||
;;
|
||||
|
||||
-*)
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether pthreads work with $ax_pthread_try_flag" >&5
|
||||
$as_echo_n "checking whether pthreads work with $ax_pthread_try_flag... " >&6; }
|
||||
PTHREAD_CFLAGS="$ax_pthread_try_flag"
|
||||
;;
|
||||
|
||||
pthread-config)
|
||||
# Extract the first word of "pthread-config", so it can be a program name with args.
|
||||
set dummy pthread-config; ac_word=$2
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
|
||||
$as_echo_n "checking for $ac_word... " >&6; }
|
||||
if ${ac_cv_prog_ax_pthread_config+:} false; then :
|
||||
$as_echo_n "(cached) " >&6
|
||||
else
|
||||
if test -n "$ax_pthread_config"; then
|
||||
ac_cv_prog_ax_pthread_config="$ax_pthread_config" # Let the user override the test.
|
||||
else
|
||||
as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
|
||||
for as_dir in $PATH
|
||||
do
|
||||
IFS=$as_save_IFS
|
||||
test -z "$as_dir" && as_dir=.
|
||||
for ac_exec_ext in '' $ac_executable_extensions; do
|
||||
if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
|
||||
ac_cv_prog_ax_pthread_config="yes"
|
||||
$as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
|
||||
break 2
|
||||
fi
|
||||
done
|
||||
done
|
||||
IFS=$as_save_IFS
|
||||
|
||||
test -z "$ac_cv_prog_ax_pthread_config" && ac_cv_prog_ax_pthread_config="no"
|
||||
fi
|
||||
fi
|
||||
ax_pthread_config=$ac_cv_prog_ax_pthread_config
|
||||
if test -n "$ax_pthread_config"; then
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_pthread_config" >&5
|
||||
$as_echo "$ax_pthread_config" >&6; }
|
||||
else
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
|
||||
$as_echo "no" >&6; }
|
||||
fi
|
||||
|
||||
|
||||
if test "x$ax_pthread_config" = "xno"; then :
|
||||
continue
|
||||
fi
|
||||
PTHREAD_CFLAGS="`pthread-config --cflags`"
|
||||
PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`"
|
||||
;;
|
||||
|
||||
*)
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for the pthreads library -l$ax_pthread_try_flag" >&5
|
||||
$as_echo_n "checking for the pthreads library -l$ax_pthread_try_flag... " >&6; }
|
||||
PTHREAD_LIBS="-l$ax_pthread_try_flag"
|
||||
;;
|
||||
esac
|
||||
|
||||
ax_pthread_save_CFLAGS="$CFLAGS"
|
||||
ax_pthread_save_LIBS="$LIBS"
|
||||
CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
|
||||
LIBS="$PTHREAD_LIBS $LIBS"
|
||||
|
||||
# Check for various functions. We must include pthread.h,
|
||||
# since some functions may be macros. (On the Sequent, we
|
||||
# need a special flag -Kthread to make this header compile.)
|
||||
# We check for pthread_join because it is in -lpthread on IRIX
|
||||
# while pthread_create is in libc. We check for pthread_attr_init
|
||||
# due to DEC craziness with -lpthreads. We check for
|
||||
# pthread_cleanup_push because it is one of the few pthread
|
||||
# functions on Solaris that doesn't have a non-functional libc stub.
|
||||
# We try pthread_create on general principles.
|
||||
|
||||
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
|
||||
/* end confdefs.h. */
|
||||
#include <pthread.h>
|
||||
# if $ax_pthread_check_cond
|
||||
# error "$ax_pthread_check_macro must be defined"
|
||||
# endif
|
||||
static void routine(void *a) { a = 0; }
|
||||
static void *start_routine(void *a) { return a; }
|
||||
int
|
||||
main ()
|
||||
{
|
||||
pthread_t th; pthread_attr_t attr;
|
||||
pthread_create(&th, 0, start_routine, 0);
|
||||
pthread_join(th, 0);
|
||||
pthread_attr_init(&attr);
|
||||
pthread_cleanup_push(routine, 0);
|
||||
pthread_cleanup_pop(0) /* ; */
|
||||
;
|
||||
return 0;
|
||||
}
|
||||
_ACEOF
|
||||
if ac_fn_c_try_link "$LINENO"; then :
|
||||
ax_pthread_ok=yes
|
||||
fi
|
||||
rm -f core conftest.err conftest.$ac_objext \
|
||||
conftest$ac_exeext conftest.$ac_ext
|
||||
|
||||
CFLAGS="$ax_pthread_save_CFLAGS"
|
||||
LIBS="$ax_pthread_save_LIBS"
|
||||
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_pthread_ok" >&5
|
||||
$as_echo "$ax_pthread_ok" >&6; }
|
||||
if test "x$ax_pthread_ok" = "xyes"; then :
|
||||
break
|
||||
fi
|
||||
|
||||
PTHREAD_LIBS=""
|
||||
PTHREAD_CFLAGS=""
|
||||
done
|
||||
fi
|
||||
|
||||
# Various other checks:
|
||||
if test "x$ax_pthread_ok" = "xyes"; then
|
||||
ax_pthread_save_CFLAGS="$CFLAGS"
|
||||
ax_pthread_save_LIBS="$LIBS"
|
||||
CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
|
||||
LIBS="$PTHREAD_LIBS $LIBS"
|
||||
|
||||
# Detect AIX lossage: JOINABLE attribute is called UNDETACHED.
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for joinable pthread attribute" >&5
|
||||
$as_echo_n "checking for joinable pthread attribute... " >&6; }
|
||||
if ${ax_cv_PTHREAD_JOINABLE_ATTR+:} false; then :
|
||||
$as_echo_n "(cached) " >&6
|
||||
else
|
||||
ax_cv_PTHREAD_JOINABLE_ATTR=unknown
|
||||
for ax_pthread_attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do
|
||||
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
|
||||
/* end confdefs.h. */
|
||||
#include <pthread.h>
|
||||
int
|
||||
main ()
|
||||
{
|
||||
int attr = $ax_pthread_attr; return attr /* ; */
|
||||
;
|
||||
return 0;
|
||||
}
|
||||
_ACEOF
|
||||
if ac_fn_c_try_link "$LINENO"; then :
|
||||
ax_cv_PTHREAD_JOINABLE_ATTR=$ax_pthread_attr; break
|
||||
fi
|
||||
rm -f core conftest.err conftest.$ac_objext \
|
||||
conftest$ac_exeext conftest.$ac_ext
|
||||
done
|
||||
|
||||
fi
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_PTHREAD_JOINABLE_ATTR" >&5
|
||||
$as_echo "$ax_cv_PTHREAD_JOINABLE_ATTR" >&6; }
|
||||
if test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xunknown" && \
|
||||
test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xPTHREAD_CREATE_JOINABLE" && \
|
||||
test "x$ax_pthread_joinable_attr_defined" != "xyes"; then :
|
||||
|
||||
cat >>confdefs.h <<_ACEOF
|
||||
#define PTHREAD_CREATE_JOINABLE $ax_cv_PTHREAD_JOINABLE_ATTR
|
||||
_ACEOF
|
||||
|
||||
ax_pthread_joinable_attr_defined=yes
|
||||
|
||||
fi
|
||||
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether more special flags are required for pthreads" >&5
|
||||
$as_echo_n "checking whether more special flags are required for pthreads... " >&6; }
|
||||
if ${ax_cv_PTHREAD_SPECIAL_FLAGS+:} false; then :
|
||||
$as_echo_n "(cached) " >&6
|
||||
else
|
||||
ax_cv_PTHREAD_SPECIAL_FLAGS=no
|
||||
case $host_os in
|
||||
solaris*)
|
||||
ax_cv_PTHREAD_SPECIAL_FLAGS="-D_POSIX_PTHREAD_SEMANTICS"
|
||||
;;
|
||||
esac
|
||||
|
||||
fi
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_PTHREAD_SPECIAL_FLAGS" >&5
|
||||
$as_echo "$ax_cv_PTHREAD_SPECIAL_FLAGS" >&6; }
|
||||
if test "x$ax_cv_PTHREAD_SPECIAL_FLAGS" != "xno" && \
|
||||
test "x$ax_pthread_special_flags_added" != "xyes"; then :
|
||||
PTHREAD_CFLAGS="$ax_cv_PTHREAD_SPECIAL_FLAGS $PTHREAD_CFLAGS"
|
||||
ax_pthread_special_flags_added=yes
|
||||
fi
|
||||
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for PTHREAD_PRIO_INHERIT" >&5
|
||||
$as_echo_n "checking for PTHREAD_PRIO_INHERIT... " >&6; }
|
||||
if ${ax_cv_PTHREAD_PRIO_INHERIT+:} false; then :
|
||||
$as_echo_n "(cached) " >&6
|
||||
else
|
||||
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
|
||||
/* end confdefs.h. */
|
||||
#include <pthread.h>
|
||||
int
|
||||
main ()
|
||||
{
|
||||
int i = PTHREAD_PRIO_INHERIT;
|
||||
;
|
||||
return 0;
|
||||
}
|
||||
_ACEOF
|
||||
if ac_fn_c_try_link "$LINENO"; then :
|
||||
ax_cv_PTHREAD_PRIO_INHERIT=yes
|
||||
else
|
||||
ax_cv_PTHREAD_PRIO_INHERIT=no
|
||||
fi
|
||||
rm -f core conftest.err conftest.$ac_objext \
|
||||
conftest$ac_exeext conftest.$ac_ext
|
||||
|
||||
fi
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_PTHREAD_PRIO_INHERIT" >&5
|
||||
$as_echo "$ax_cv_PTHREAD_PRIO_INHERIT" >&6; }
|
||||
if test "x$ax_cv_PTHREAD_PRIO_INHERIT" = "xyes" && \
|
||||
test "x$ax_pthread_prio_inherit_defined" != "xyes"; then :
|
||||
|
||||
$as_echo "#define HAVE_PTHREAD_PRIO_INHERIT 1" >>confdefs.h
|
||||
|
||||
ax_pthread_prio_inherit_defined=yes
|
||||
|
||||
fi
|
||||
|
||||
CFLAGS="$ax_pthread_save_CFLAGS"
|
||||
LIBS="$ax_pthread_save_LIBS"
|
||||
|
||||
# More AIX lossage: compile with *_r variant
|
||||
if test "x$GCC" != "xyes"; then
|
||||
case $host_os in
|
||||
aix*)
|
||||
case "x/$CC" in #(
|
||||
x*/c89|x*/c89_128|x*/c99|x*/c99_128|x*/cc|x*/cc128|x*/xlc|x*/xlc_v6|x*/xlc128|x*/xlc128_v6) :
|
||||
#handle absolute path differently from PATH based program lookup
|
||||
case "x$CC" in #(
|
||||
x/*) :
|
||||
if as_fn_executable_p ${CC}_r; then :
|
||||
PTHREAD_CC="${CC}_r"
|
||||
fi ;; #(
|
||||
*) :
|
||||
for ac_prog in ${CC}_r
|
||||
do
|
||||
# Extract the first word of "$ac_prog", so it can be a program name with args.
|
||||
set dummy $ac_prog; ac_word=$2
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
|
||||
$as_echo_n "checking for $ac_word... " >&6; }
|
||||
if ${ac_cv_prog_PTHREAD_CC+:} false; then :
|
||||
$as_echo_n "(cached) " >&6
|
||||
else
|
||||
if test -n "$PTHREAD_CC"; then
|
||||
ac_cv_prog_PTHREAD_CC="$PTHREAD_CC" # Let the user override the test.
|
||||
else
|
||||
as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
|
||||
for as_dir in $PATH
|
||||
do
|
||||
IFS=$as_save_IFS
|
||||
test -z "$as_dir" && as_dir=.
|
||||
for ac_exec_ext in '' $ac_executable_extensions; do
|
||||
if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
|
||||
ac_cv_prog_PTHREAD_CC="$ac_prog"
|
||||
$as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
|
||||
break 2
|
||||
fi
|
||||
done
|
||||
done
|
||||
IFS=$as_save_IFS
|
||||
|
||||
fi
|
||||
fi
|
||||
PTHREAD_CC=$ac_cv_prog_PTHREAD_CC
|
||||
if test -n "$PTHREAD_CC"; then
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $PTHREAD_CC" >&5
|
||||
$as_echo "$PTHREAD_CC" >&6; }
|
||||
else
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
|
||||
$as_echo "no" >&6; }
|
||||
fi
|
||||
|
||||
|
||||
test -n "$PTHREAD_CC" && break
|
||||
done
|
||||
test -n "$PTHREAD_CC" || PTHREAD_CC="$CC"
|
||||
;;
|
||||
esac ;; #(
|
||||
*) :
|
||||
;;
|
||||
esac
|
||||
;;
|
||||
esac
|
||||
fi
|
||||
fi
|
||||
|
||||
test -n "$PTHREAD_CC" || PTHREAD_CC="$CC"
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
|
||||
if test "x$ax_pthread_ok" = "xyes"; then
|
||||
threads=yes
|
||||
:
|
||||
else
|
||||
ax_pthread_ok=no
|
||||
threads=no
|
||||
fi
|
||||
ac_ext=cpp
|
||||
ac_cpp='$CXXCPP $CPPFLAGS'
|
||||
ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
|
||||
ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
|
||||
ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
|
||||
|
||||
|
||||
if test "$threads" = "yes"; then
|
||||
save_LIBS="$LIBS"
|
||||
LIBS="$PTHREAD_LIBS $LIBS"
|
||||
save_CXXFLAGS="$CXXFLAGS"
|
||||
CXXFLAGS="$PTHREAD_CFLAGS $save_CXXFLAGS"
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for std::thread" >&5
|
||||
$as_echo_n "checking for std::thread... " >&6; }
|
||||
if ${gdb_cv_cxx_std_thread+:} false; then :
|
||||
$as_echo_n "(cached) " >&6
|
||||
else
|
||||
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
|
||||
/* end confdefs.h. */
|
||||
#include <thread>
|
||||
void callback() { }
|
||||
int
|
||||
main ()
|
||||
{
|
||||
std::thread t(callback);
|
||||
;
|
||||
return 0;
|
||||
}
|
||||
_ACEOF
|
||||
if ac_fn_cxx_try_compile "$LINENO"; then :
|
||||
gdb_cv_cxx_std_thread=yes
|
||||
else
|
||||
gdb_cv_cxx_std_thread=no
|
||||
fi
|
||||
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
|
||||
fi
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gdb_cv_cxx_std_thread" >&5
|
||||
$as_echo "$gdb_cv_cxx_std_thread" >&6; }
|
||||
LIBS="$save_LIBS"
|
||||
CXXFLAGS="$save_CXXFLAGS"
|
||||
fi
|
||||
if test $gdb_cv_cxx_std_thread = yes; then
|
||||
|
||||
$as_echo "#define CXX_STD_THREAD 1" >>confdefs.h
|
||||
|
||||
fi
|
||||
ac_ext=c
|
||||
ac_cpp='$CPP $CPPFLAGS'
|
||||
ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
|
||||
ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
|
||||
ac_compiler_gnu=$ac_cv_c_compiler_gnu
|
||||
|
||||
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for sigsetjmp" >&5
|
||||
$as_echo_n "checking for sigsetjmp... " >&6; }
|
||||
if ${gdb_cv_func_sigsetjmp+:} false; then :
|
||||
|
||||
Reference in New Issue
Block a user