# ===========================================================================
#   http://www.gnu.org/software/autoconf-archive/ax_check_compile_flag.html
#  https://www.gnu.org/software/autoconf-archive/ax_check_compile_flag.html
# ===========================================================================
#
# SYNOPSIS
#
#   AX_CHECK_COMPILE_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS], [INPUT])
#
# DESCRIPTION

#   macro in sync with AX_CHECK_{PREPROC,LINK}_FLAG.
#
# LICENSE
#
#   Copyright (c) 2008 Guido U. Draheim <[email protected]>
#   Copyright (c) 2011 Maarten Bosmans <[email protected]>
#
#   This program is free software: you can redistribute it and/or modify it
#   under the terms of the GNU General Public License as published by the
#   Free Software Foundation, either version 3 of the License, or (at your
#   option) any later version.
#
#   This program is distributed in the hope that it will be useful, but
#   WITHOUT ANY WARRANTY; without even the implied warranty of
#   Copying and distribution of this file, with or without modification, are
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
#   Public License for more details.
#
#   You should have received a copy of the GNU General Public License along
#   with this program. If not, see <http://www.gnu.org/licenses/>.
#
#   As a special exception, the respective Autoconf Macro's copyright owner
#   permitted in any medium without royalty provided the copyright notice
#   gives unlimited permission to copy, distribute and modify the configure
#   scripts that are the output of Autoconf when processing the Macro. You
#   need not follow the terms of the GNU General Public License when using
#   or distributing such scripts, even though portions of the text of the
#   Macro appear in them. The GNU General Public License (GPL) does govern
#   all other use of the material that constitutes the Autoconf Macro.
#
#   This special exception to the GPL applies to versions of the Autoconf
#   Macro released by the Autoconf Archive. When you make and distribute a
#   modified version of the Autoconf Macro, you may extend this special
#   exception to the GPL to apply to your modified version as well.
#   and this notice are preserved.  This file is offered as-is, without any
#   warranty.

#serial 4
#serial 6

AC_DEFUN([AX_CHECK_COMPILE_FLAG],
[AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_IF
AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]flags_$4_$1])dnl
AC_CACHE_CHECK([whether _AC_LANG compiler accepts $1], CACHEVAR, [
  ax_check_save_flags=$[]_AC_LANG_PREFIX[]FLAGS
  _AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $4 $1"

			AC_LANG_POP(C)
			unset tryrpath
		])

		LDFLAGS="$OLD_LDFLAGS"
		unset OLD_LDFLAGS

		if test -n "$rsk_cv_link_set_rpath"; then
		ADDLDFLAGS=""
		for opt in $LDFLAGS $LIBS; do
			if echo "$opt" | grep '^-L' >/dev/null; then
				rpathdir="`echo "$opt" | sed 's@^-L *@@'`"
				ADDLDFLAGS="$ADDLDFLAGS $rsk_cv_link_set_rpath -Wl,$rpathdir"
			fi
		done
		unset opt
			ADDLDFLAGS=""
			for opt in $LDFLAGS $LIBS; do
				if echo "$opt" | grep '^-L' >/dev/null; then
					rpathdir="`echo "$opt" | sed 's@^-L *@@'`"
					ADDLDFLAGS="$ADDLDFLAGS $rsk_cv_link_set_rpath -Wl,$rpathdir"
				fi
			done
			unset opt

		LDFLAGS="$LDFLAGS $ADDLDFLAGS"
			LDFLAGS="$LDFLAGS $ADDLDFLAGS"

		unset ADDLDFLAGS
			unset ADDLDFLAGS
		fi
	fi
])

AC_DEFUN([DC_CHK_OS_INFO], [
	AC_CANONICAL_HOST
	AC_SUBST(SHOBJEXT)
	AC_SUBST(SHOBJFLAGS)

					*)
						SHOBJEXT="sl"
						;;
				esac
				;;
			mingw32|mingw32msvc*)
				SHOBJEXT="dll"
				AREXT='lib'
				CFLAGS="$CFLAGS -mms-bitfields"
				CPPFLAGS="$CPPFLAGS -mms-bitfields"
				SHOBJCPPFLAGS="-DPIC"
				SHOBJLDFLAGS='-shared -Wl,--dll -Wl,--enable-auto-image-base -Wl,--output-def,$[@].def,--out-implib,$[@].a'
				;;
			msvc)
				SHOBJEXT="dll"