diff options
Diffstat (limited to 'libiberty/aclocal.m4')
| -rw-r--r-- | libiberty/aclocal.m4 | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/libiberty/aclocal.m4 b/libiberty/aclocal.m4 index b6a38d60522..b6c611e132d 100644 --- a/libiberty/aclocal.m4 +++ b/libiberty/aclocal.m4 @@ -69,3 +69,17 @@ if test $ac_cv_func_strncmp_works = no ; then LIBOBJS="$LIBOBJS strncmp.o" fi ]) + +dnl See if errno must be declared even when <errno.h> is included. +AC_DEFUN(libiberty_AC_DECLARE_ERRNO, +[AC_CACHE_CHECK(whether errno must be declared, libiberty_cv_declare_errno, +[AC_TRY_COMPILE( +[#include <errno.h>], +[int x = errno;], +libiberty_cv_declare_errno=no, +libiberty_cv_declare_errno=yes)]) +if test $libiberty_cv_declare_errno = yes +then AC_DEFINE(NEED_DECLARATION_ERRNO, 1, + [Define if errno must be declared even when <errno.h> is included.]) +fi +]) |