forked from Imagelibrary/rtems
2efdd08b40
The breakdown:
* CC_FOR_TARGET and CXX_FOR_TARGET were not correctly re-read
from autoconf's configuration cache (config.cache)
* If <target>-[gcc|g++] was not found while running configure,
the config macros tried to use other (wrong) compilers (e.g. cc).
Changes:
* New RTEMS_PROG_CC macro (aclocal/prog-cc.m4).
* New RTEMS_PROG_CXX macro (aclocal/prog-cxx.m4)
* Moved a shell script fragment from configure.in to a
new m4-autoconf macro (New file: aclocal/tool-prefix.m4)
* Minor changes to configure.in
I tested it with linux/posix (native gcc/primary libc) and
sh-rtems/gensh1 on a linux host and didn't notice any bugs
related to the problems mentioned above. There seem to be
more bugs with the posix bsp, but I consider them minor as
the build run completed successfully. It is just too late
for me to attempt to fix them now.
66 lines
1.5 KiB
Plaintext
66 lines
1.5 KiB
Plaintext
dnl
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dnl $Id$
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dnl
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dnl Check for target g++
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dnl
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dnl 98/05/20 Ralf Corsepius (corsepiu@faw.uni-ulm.de)
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dnl Completely reworked
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AC_DEFUN(RTEMS_PROG_CXX,
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[
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AC_BEFORE([$0], [AC_PROG_CXXCPP])dnl
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AC_BEFORE([$0], [AC_PROG_CXX])dnl
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AC_REQUIRE([RTEMS_TOOL_PREFIX])dnl
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dnl Only accept g++ and c++
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dnl NOTE: This might be too restrictive for native compilation
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AC_PATH_PROGS(CXX_FOR_TARGET, "$program_prefix"g++ "$program_prefix"c++)
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test -z "$CXX_FOR_TARGET" \
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&& AC_MSG_ERROR([no acceptable c++ found in \$PATH])
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dnl backup
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rtems_save_CXX=$CXX
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rtems_save_CXXFLAGS=$CXXFLAGS
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dnl temporarily set CXX
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CXX=$CXX_FOR_TARGET
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AC_PROG_CXX_WORKS
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AC_PROG_CXX_GNU
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if test $ac_cv_prog_gxx = yes; then
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GXX=yes
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dnl Check whether -g works, even if CXXFLAGS is set, in case the package
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dnl plays around with CXXFLAGS (such as to build both debugging and
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dnl normal versions of a library), tasteless as that idea is.
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ac_test_CXXFLAGS="${CXXFLAGS+set}"
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ac_save_CXXFLAGS="$CXXFLAGS"
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CXXFLAGS=
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AC_PROG_CXX_G
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if test "$ac_test_CXXFLAGS" = set; then
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CXXFLAGS="$ac_save_CXXFLAGS"
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elif test $ac_cv_prog_cxx_g = yes; then
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CXXFLAGS="-g -O2"
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else
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CXXFLAGS="-O2"
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fi
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else
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GXX=
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test "${CXXFLAGS+set}" = set || CXXFLAGS="-g"
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fi
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rtems_cv_prog_gxx=$ac_cv_prog_gxx
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rtems_cv_prog_cxx_g=$ac_cv_prog_cxx_g
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rtems_cv_prog_cxx_works=$ac_cv_prog_cxx_works
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rtems_cv_prog_cxx_cross=$ac_cv_prog_cxx_cross
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CXX=$rtems_save_CXX
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CXXFLAGS=$rtems_save_CXXFLAGS
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dnl restore initial values
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unset ac_cv_prog_gxx
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unset ac_cv_prog_cc_g
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unset ac_cv_prog_cxx_works
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unset ac_cv_prog_cxx_cross
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])
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