diff options
Diffstat (limited to 'm4/attribute.m4')
| -rw-r--r-- | m4/attribute.m4 | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/m4/attribute.m4 b/m4/attribute.m4 new file mode 100644 index 0000000..3aa2e5f --- /dev/null +++ b/m4/attribute.m4 @@ -0,0 +1,16 @@ +#!/usr/bin/m4 +dnl Check for compiler attributes + +AC_DEFUN([PAM_ATTRIBUTE_UNUSED], [ + AC_CACHE_CHECK([for __attribute__((unused))], [pam_cv_attribute_unused], + [AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM([[int fun(int i __attribute__((unused)));]], + [[return fun(0);]])], + [pam_cv_attribute_unused=yes], + [pam_cv_attribute_unused=no])]) + AS_IF([test "$pam_cv_attribute_unused" = yes], + [unused='__attribute__((unused))'], + [unused=]) + AC_DEFINE_UNQUOTED([UNUSED], [$unused], + [Define if the compiler supports __attribute__((unused))]) +]) |