# ===========================================================================
-# http://www.gnu.org/software/autoconf-archive/ax_save_flags.html
+# https://www.gnu.org/software/autoconf-archive/ax_save_flags.html
# ===========================================================================
#
# SYNOPSIS
#
-# AX_SAVE_FLAGS()
+# AX_SAVE_FLAGS([NAMESPACE])
#
# DESCRIPTION
#
-# Save common compilation flags into temporary variables
+# Save common compilation flags into temporary variables.
+#
+# Compilation flags includes: CPPFLAGS, CFLAGS, CXXFLAGS, LDFLAGS, LIBS,
+# OBJCFLAGS.
+#
+# By default these flags are saved to a global (empty) namespace, but user
+# could specify a specific NAMESPACE to AX_SAVE_FLAGS macro and latter
+# restore it by using AX_RESTORE_FLAGS(NAMESPACE).
+#
+# AX_SAVE_FLAGS(mypackage)
+# CPPFLAGS="-Imypackagespath ${CPPFLAGS}"
+# dnl .. do some detection ...
+# AX_RESTORE_FLAGS(mypackage)
#
# 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 3
+#serial 8
+
+# list of flag to save
+AC_DEFUN([_AX_SAVE_FLAGS_LIST],[dnl
+[CCASFLAGS],dnl
+[CFLAGS],dnl
+[CPPFLAGS],dnl
+[CXXFLAGS],dnl
+[ERLCFLAGS],dnl
+[FCFLAGS],dnl
+[FCLIBS],dnl
+[FFLAGS],dnl
+[FLIBS],dnl
+[GCJFLAGS],dnl
+[JAVACFLAGS],dnl
+[LDFLAGS],dnl
+[LIBS],dnl
+[OBJCFLAGS],dnl
+[OBJCXXFLAGS],dnl
+[UPCFLAGS],dnl
+[VALAFLAGS]dnl
+])
+
+# save one flag in name space
+AC_DEFUN([_AX_SAVE_ONE_FLAG],[
+ AS_VAR_PUSHDEF([_ax_save_flag_var], [$2[]_$1[]_ax_save_flags])
+ AS_VAR_COPY(_ax_save_flag_var, $2[])
+ AS_VAR_POPDEF([_ax_save_flag_var])
+])
-AC_DEFUN([AX_SAVE_FLAGS], [
- CPPFLAGS_save="${CPPFLAGS}"
- CFLAGS_save="${CFLAGS}"
- CXXFLAGS_save="${CXXFLAGS}"
- OBJCFLAGS_save="${OBJCFLAGS}"
- LDFLAGS_save="${LDFLAGS}"
- LIBS_save="${LIBS}"
+AC_DEFUN([AX_SAVE_FLAGS],[dnl
+ m4_foreach([FLAG], dnl
+ [_AX_SAVE_FLAGS_LIST()], dnl
+ [_AX_SAVE_ONE_FLAG([$1],FLAG)])
])