From d71ab7fdf84c039744713da3fa4c5f8917e34f13 Mon Sep 17 00:00:00 2001 From: Ralf Corsepius Date: Tue, 21 Sep 2004 14:30:53 +0000 Subject: 2004-09-21 Ralf Corsepius * aclocal/gcc-weak.m4: New (Extracted from cpukit/configure.ac). * configure.ac: Add RTEMS_CHECK_GCC_WEAK. --- cpukit/aclocal/gcc-weak.m4 | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) create mode 100644 cpukit/aclocal/gcc-weak.m4 (limited to 'cpukit/aclocal') 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]) +]) +]) -- cgit v1.2.3