-# minmax.m4 serial 1
-dnl Copyright (C) 2005 Free Software Foundation, Inc.
+# minmax.m4 serial 4
+dnl Copyright (C) 2005, 2009-2014 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
+AC_PREREQ([2.53])
+
AC_DEFUN([gl_MINMAX],
[
AC_REQUIRE([gl_PREREQ_MINMAX])
])
dnl gl_MINMAX_IN_HEADER(HEADER)
+dnl The parameter has to be a literal header name; it cannot be macro,
+dnl nor a shell variable. (Because autoheader collects only AC_DEFINE
+dnl invocations with a literal macro name.)
AC_DEFUN([gl_MINMAX_IN_HEADER],
[
- define([header],[translit([$1],[./-],
- [___])])
- define([HEADER],[translit([$1],[abcdefghijklmnopqrstuvwxyz./-],
- [ABCDEFGHIJKLMNOPQRSTUVWXYZ___])])
+ m4_pushdef([header], AS_TR_SH([$1]))
+ m4_pushdef([HEADER], AS_TR_CPP([$1]))
AC_CACHE_CHECK([whether <$1> defines MIN and MAX],
[gl_cv_minmax_in_]header,
- [AC_TRY_COMPILE([#include <$1>
-int x = MIN (42, 17);], [],
+ [AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[#include <$1>
+ int x = MIN (42, 17);]],
+ [[]])],
[gl_cv_minmax_in_]header[=yes],
[gl_cv_minmax_in_]header[=no])])
if test $gl_cv_minmax_in_[]header = yes; then
AC_DEFINE([HAVE_MINMAX_IN_]HEADER, 1,
[Define to 1 if <$1> defines the MIN and MAX macros.])
fi
- undefine([HEADER])
- undefine([header])
+ m4_popdef([HEADER])
+ m4_popdef([header])
])