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   1 # ===========================================================================
   2 #      http://www.gnu.org/software/autoconf-archive/ax_switch_flags.html
   3 # ===========================================================================
   4 #
   5 # SYNOPSIS
   6 #
   7 #   AX_SWITCH_FLAGS(newnamespace,[oldnamespace])
   8 #
   9 # DESCRIPTION
  10 #
  11 #   Switch common compilation flags from temporary variables between two
  12 #   compilation namespace.
  13 #
  14 #   Compilation flags includes: CPPFLAGS, CFLAGS, CXXFLAGS, LDFLAGS, LIBS,
  15 #   OBJCFLAGS.
  16 #
  17 #   By default these flags are restored to a global (empty) namespace, but
  18 #   user could restore from specific NAMESPACE by using
  19 #   AX_RESTORE_FLAGS(NAMESPACE) macro.
  20 #
  21 #   Typical usage is like:
  22 #
  23 #     AX_SAVE_FLAGS(beginprogram)
  24 #     CPPFLAGS="-Imypackagespath ${CPPFLAGS}"
  25 #     AX_SWITCH_FLAGS(mypackage,beginprogram)
  26 #
  27 # LICENSE
  28 #
  29 #   Copyright (c) 2009 Filippo Giunchedi <filippo@esaurito.net>
  30 #   Copyright (c) 2011 Russ Allbery <rra@stanford.edu>
  31 #   Copyright (c) 2013 Bastien ROUCARIES <roucaries.bastien+autoconf@gmail.com>
  32 #
  33 #   Copying and distribution of this file, with or without modification, are
  34 #   permitted in any medium without royalty provided the copyright notice
  35 #   and this notice are preserved. This file is offered as-is, without any
  36 #   warranty.
  37
  38 #serial 2
  39
  40 AC_DEFUN([AX_SWITCH_FLAGS], [
  41   AC_REQUIRE(AX_SAVE_FLAGS)
  42   AC_REQUIRE(AX_RESTORE_FLAGS)
  43   AS_IF([test "X$1" = "X"], AC_MSG_ERROR(newnamespace is empty)]
  44   AX_SAVE_FLAGS($1[])
  45   AX_RESTORE_FLAGS($2[])
  46 ])