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| author | Ralf Corsepius <ralf.corsepius@rtems.org> | 2004-09-21 14:30:53 +0000 |
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| committer | Ralf Corsepius <ralf.corsepius@rtems.org> | 2004-09-21 14:30:53 +0000 |
| commit | d71ab7fdf84c039744713da3fa4c5f8917e34f13 (patch) | |
| tree | dca18ee61d20bca52b6a5fa6b0ad6f62f3b89813 /cpukit/aclocal | |
| parent | 2004-09-17 Joel Sherrill <joel@OARcorp.com> (diff) | |
| download | rtems-d71ab7fdf84c039744713da3fa4c5f8917e34f13.tar.bz2 | |
2004-09-21 Ralf Corsepius <ralf_corsepius@rtems.org>
* aclocal/gcc-weak.m4: New (Extracted from cpukit/configure.ac).
* configure.ac: Add RTEMS_CHECK_GCC_WEAK.
Diffstat (limited to 'cpukit/aclocal')
| -rw-r--r-- | cpukit/aclocal/gcc-weak.m4 | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/cpukit/aclocal/gcc-weak.m4 b/cpukit/aclocal/gcc-weak.m4 new file mode 100644 index 0000000000..73cfb28e7e --- /dev/null +++ b/cpukit/aclocal/gcc-weak.m4 @@ -0,0 +1,19 @@ +AC_DEFUN([RTEMS_CHECK_GCC_WEAK],[ +AC_CACHE_CHECK([whether $CC supports function __attribute__((weak))], +[rtems_cv_cc_attribute_weak],[ + AS_IF([test x"$GCC" = xyes],[ + save_CFLAGS=$CFLAGS + CFLAGS=-Werror]) + + AC_COMPILE_IFELSE([ + AC_LANG_PROGRAM( + [void myfunc(char c) __attribute__ ((weak)); + void myfunc(char c) {}], + [])], + [rtems_cv_cc_attribute_weak=yes], + [rtems_cv_cc_attribute_weak=no]) + + AS_IF([test x"$GCC" = xyes],[ + CFLAGS=$save_CFLAGS]) +]) +]) |