dnl
dnl Author: Thomas E. Dickey
dnl
-dnl $Id: aclocal.m4,v 1.171 2021/01/06 01:29:44 tom Exp $
+dnl $Id: aclocal.m4,v 1.172 2021/03/20 16:31:13 tom Exp $
dnl Macros used in NCURSES Ada95 auto-configuration script.
dnl
dnl These macros are maintained separately from NCURSES. The copyright on
AC_SUBST(BUILD_OBJEXT)
])dnl
dnl ---------------------------------------------------------------------------
+dnl CF_C11_NORETURN version: 1 updated: 2021/03/20 12:00:25
+dnl ---------------
+AC_DEFUN([CF_C11_NORETURN],
+[
+AC_CACHE_CHECK([for C11 _Noreturn feature], cf_cv_c11_noreturn,
+ [AC_TRY_COMPILE([
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdnoreturn.h>
+static void giveup(void) { exit(0); }
+ ],
+ [if (feof(stdin)) giveup()],
+ cf_cv_c11_noreturn=yes,
+ cf_cv_c11_noreturn=no)
+ ])
+
+if test "$cf_cv_c11_noreturn" = yes; then
+ AC_DEFINE(HAVE_STDNORETURN_H, 1)
+ AC_DEFINE_UNQUOTED(STDC_NORETURN,_Noreturn,[Define if C11 _Noreturn keyword is supported])
+ HAVE_STDNORETURN_H=1
+else
+ HAVE_STDNORETURN_H=0
+fi
+
+AC_SUBST(HAVE_STDNORETURN_H)
+])dnl
+dnl ---------------------------------------------------------------------------
dnl CF_CC_ENV_FLAGS version: 10 updated: 2020/12/31 18:40:20
dnl ---------------
dnl Check for user's environment-breakage by stuffing CFLAGS/CPPFLAGS content
AC_SUBST(EXTRA_CFLAGS)
])dnl
dnl ---------------------------------------------------------------------------
-dnl CF_GCC_ATTRIBUTES version: 23 updated: 2021/01/03 18:30:50
+dnl CF_GCC_ATTRIBUTES version: 24 updated: 2021/03/20 12:00:25
dnl -----------------
dnl Test for availability of useful gcc __attribute__ directives to quiet
dnl compiler warnings. Though useful, not all are supported -- and contrary
dnl to documentation, unrecognized directives cause older compilers to barf.
AC_DEFUN([CF_GCC_ATTRIBUTES],
[AC_REQUIRE([AC_PROG_FGREP])dnl
+AC_REQUIRE([CF_C11_NORETURN])dnl
if test "$GCC" = yes || test "$GXX" = yes
then
#define GCC_SCANFLIKE(fmt,var) /*nothing*/
#endif
extern void wow(char *,...) GCC_SCANFLIKE(1,2);
-extern void oops(char *,...) GCC_PRINTFLIKE(1,2) GCC_NORETURN;
-extern void foo(void) GCC_NORETURN;
+extern GCC_NORETURN void oops(char *,...) GCC_PRINTFLIKE(1,2);
+extern GCC_NORETURN void foo(void);
int main(int argc GCC_UNUSED, char *argv[[]] GCC_UNUSED) { (void)argc; (void)argv; return 0; }
EOF
cf_printf_attribute=no