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dnl -*- Autoconf -*-
dnl Copyright (C) 1993-2008, 2011, 2017 Free Software Foundation, Inc.
dnl This file is free software, distributed under the terms of the GNU
dnl General Public License. As a special exception to the GNU General
dnl Public License, this file may be distributed as part of a program
dnl that contains a configuration script generated by Autoconf, under
dnl the same distribution terms as the rest of that program.
dnl From Bruno Haible, Marcus Daniels, Sam Steingold.
AC_PREREQ([2.61])
dnl CL_MACHINE([MESSAGE], [PROGRAM_TO_RUN], [CROSS_MACRO], [DESTINATION], [CACHE_VAR])
AC_DEFUN([CL_MACHINE],
[
AC_REQUIRE([AC_PROG_CC])
AC_REQUIRE([AC_C_CHAR_UNSIGNED])
cl_machine_file_c=$2
if test -z "$[$5]"; then
AC_MSG_CHECKING(for [$1])
cl_machine_file_h=$4
cl_machine_file_program=`cat "$cl_machine_file_c"`
AC_RUN_IFELSE(
[AC_LANG_SOURCE([
#include "confdefs.h"
$cl_machine_file_program
])],
[AC_MSG_RESULT([created $cl_machine_file_h])
if cmp -s "$cl_machine_file_h" conftest.h 2>/dev/null; then
# The file exists and we would not be changing it
rm -f conftest.h
else
rm -f "$cl_machine_file_h"
mv conftest.h "$cl_machine_file_h"
fi
[$5]=1
],
[AC_MSG_RESULT([creation of $cl_machine_file_h failed])],
[AC_MSG_RESULT([creating $cl_machine_file_h])
$3([$4])
])
rm -f conftest.h
fi
])
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