minmax.m4
1.15 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
# minmax.m4 serial 1
dnl Copyright (C) 2005 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_DEFUN([gl_MINMAX],
[
AC_REQUIRE([gl_PREREQ_MINMAX])
])
# Prerequisites of lib/minmax.h.
AC_DEFUN([gl_PREREQ_MINMAX],
[
gl_MINMAX_IN_HEADER([limits.h])
gl_MINMAX_IN_HEADER([sys/param.h])
])
dnl gl_MINMAX_IN_HEADER(HEADER)
AC_DEFUN([gl_MINMAX_IN_HEADER],
[
define([header],[translit([$1],[./-],
[___])])
define([HEADER],[translit([$1],[abcdefghijklmnopqrstuvwxyz./-],
[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])])
AC_CACHE_CHECK([whether <$1> defines MIN and MAX],
[gl_cv_minmax_in_]header,
[AC_TRY_COMPILE([#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])
])