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#!/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))])
])
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