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# ===========================================================================
# https://www.gnu.org/software/autoconf-archive/ax_switch_flags.html
# ===========================================================================
#
# SYNOPSIS
#
# AX_SWITCH_FLAGS(newnamespace,[oldnamespace])
#
# DESCRIPTION
#
# Switch common compilation flags from temporary variables between two
# compilation namespace.
#
# Compilation flags includes: CPPFLAGS, CFLAGS, CXXFLAGS, LDFLAGS, LIBS,
# OBJCFLAGS.
#
# By default these flags are restored to a global (empty) namespace, but
# user could restore from specific NAMESPACE by using
# AX_RESTORE_FLAGS(NAMESPACE) macro.
#
# Typical usage is like:
#
# AX_SAVE_FLAGS(beginprogram)
# CPPFLAGS="-Imypackagespath ${CPPFLAGS}"
# AX_SWITCH_FLAGS(mypackage,beginprogram)
#
# LICENSE
#
# Copyright (c) 2009 Filippo Giunchedi <filippo@esaurito.net>
# Copyright (c) 2011 The Board of Trustees of the Leland Stanford Junior University
# Copyright (c) 2011 Russ Allbery <rra@stanford.edu>
# Copyright (c) 2013 Bastien ROUCARIES <roucaries.bastien+autoconf@gmail.com>
#
# Copying and distribution of this file, with or without modification, are
# permitted in any medium without royalty provided the copyright notice
# and this notice are preserved. This file is offered as-is, without any
# warranty.
#serial 4
AC_DEFUN([AX_SWITCH_FLAGS], [
AC_REQUIRE(AX_SAVE_FLAGS)
AC_REQUIRE(AX_RESTORE_FLAGS)
AS_IF([test "X$1" = "X"], AC_MSG_ERROR(newnamespace is empty)]
AX_SAVE_FLAGS($1[])
AX_RESTORE_FLAGS($2[])
])
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