projects / deliverable / binutils-gdb.git / blame
| Commit | Line | Data |
|---|---|---|
| 698be2d8 | 1 | # minmax.m4 serial 4 |
| 9c9d63b1 | 2 | dnl Copyright (C) 2005, 2009-2021 Free Software Foundation, Inc. |
| 698be2d8 CB |
3 | dnl This file is free software; the Free Software Foundation |
| 4 | dnl gives unlimited permission to copy and/or distribute it, | |
| 5 | dnl with or without modifications, as long as this notice is preserved. | |
| 6 | ||
| 7 | AC_PREREQ([2.53]) | |
| 8 | ||
| 9 | AC_DEFUN([gl_MINMAX], | |
| 10 | [ | |
| 11 | AC_REQUIRE([gl_PREREQ_MINMAX]) | |
| 12 | ]) | |
| 13 | ||
| 14 | # Prerequisites of lib/minmax.h. | |
| 15 | AC_DEFUN([gl_PREREQ_MINMAX], | |
| 16 | [ | |
| 17 | gl_MINMAX_IN_HEADER([limits.h]) | |
| 18 | gl_MINMAX_IN_HEADER([sys/param.h]) | |
| 19 | ]) | |
| 20 | ||
| 21 | dnl gl_MINMAX_IN_HEADER(HEADER) | |
| 22 | dnl The parameter has to be a literal header name; it cannot be macro, | |
| 23 | dnl nor a shell variable. (Because autoheader collects only AC_DEFINE | |
| 24 | dnl invocations with a literal macro name.) | |
| 25 | AC_DEFUN([gl_MINMAX_IN_HEADER], | |
| 26 | [ | |
| 27 | m4_pushdef([header], AS_TR_SH([$1])) | |
| 28 | m4_pushdef([HEADER], AS_TR_CPP([$1])) | |
| 29 | AC_CACHE_CHECK([whether <$1> defines MIN and MAX], | |
| 30 | [gl_cv_minmax_in_]header, | |
| 31 | [AC_COMPILE_IFELSE( | |
| 32 | [AC_LANG_PROGRAM( | |
| 33 | [[#include <$1> | |
| 34 | int x = MIN (42, 17);]], | |
| 35 | [[]])], | |
| 36 | [gl_cv_minmax_in_]header[=yes], | |
| 37 | [gl_cv_minmax_in_]header[=no])]) | |
| 38 | if test $gl_cv_minmax_in_[]header = yes; then | |
| 39 | AC_DEFINE([HAVE_MINMAX_IN_]HEADER, 1, | |
| 40 | [Define to 1 if <$1> defines the MIN and MAX macros.]) | |
| 41 | fi | |
| 42 | m4_popdef([HEADER]) | |
| 43 | m4_popdef([header]) | |
| 44 | ]) |