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Diffstat (limited to '')
| -rw-r--r-- | cpukit/libmisc/configure.ac | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/cpukit/libmisc/configure.ac b/cpukit/libmisc/configure.ac index 4f86e53f19..72c63de255 100644 --- a/cpukit/libmisc/configure.ac +++ b/cpukit/libmisc/configure.ac @@ -36,7 +36,27 @@ AC_COMPILE_IFELSE( [HAVE_ASSIGNABLE_STDIO=no]) AC_MSG_RESULT([$HAVE_ASSIGNABLE_STDIO]) -AM_CONDITIONAL([RTEMS_LIBSHELL],[test x"$HAVE_ASSIGNABLE_STDIO" = x"yes"]) +# serdbg exploits weak symbols +AC_CACHE_CHECK([whether $CC supports function __attribute__((weak))], +[rtems_cv_cc_attribute_weak],[ + AS_IF([test $GCC = yes],[ + save_CFLAGS=$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 $GCC = yes],[ + CFLAGS=$save_CFLAGS]) +]) + +AM_CONDITIONAL([LIBSHELL],[test x"$HAVE_ASSIGNABLE_STDIO" = x"yes"]) +AM_CONDITIONAL([LIBSERDBG],[test x"$rtems_cv_cc_attribute_weak" = x"yes"]) # Explicitly list all Makefiles here AC_CONFIG_FILES([Makefile |