# ===========================================================================

#  http://www.gnu.org/software/autoconf-archive/ax_append_compile_flags.html

# ===========================================================================

#

# SYNOPSIS

#

#   AX_APPEND_COMPILE_FLAGS([FLAG1 FLAG2 ...], [FLAGS-VARIABLE], [EXTRA-FLAGS])

#

# DESCRIPTION

#

#   For every FLAG1, FLAG2 it is checked whether the compiler works with the

#   flag.  If it does, the flag is added FLAGS-VARIABLE

#

#   If FLAGS-VARIABLE is not specified, the current language's flags (e.g.

#   CFLAGS) is used.  During the check the flag is always added to the

#   current language's flags.

#

#   If EXTRA-FLAGS is defined, it is added to the current language's default

#   flags (e.g. CFLAGS) when the check is done.  The check is thus made with

#   the flags: "CFLAGS EXTRA-FLAGS FLAG".  This can for example be used to

#   force the compiler to issue an error when a bad flag is given.

#

#   NOTE: This macro depends on the AX_APPEND_FLAG and

#   AX_CHECK_COMPILE_FLAG. Please keep this macro in sync with

#   AX_APPEND_LINK_FLAGS.

#

# LICENSE

#

#   Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com>

#

#   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

#   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

#   gives unlimited permission to copy, distribute and modify the configure

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#   need not follow the terms of the GNU General Public License when using

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#   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.

#serial 4

AC_DEFUN([AX_APPEND_COMPILE_FLAGS],

[AX_REQUIRE_DEFINED([AX_CHECK_COMPILE_FLAG])

AX_REQUIRE_DEFINED([AX_APPEND_FLAG])

for flag in $1; do

  AX_CHECK_COMPILE_FLAG([$flag], [AX_APPEND_FLAG([$flag], [$2])], [], [$3])

done

])dnl AX_APPEND_COMPILE_FLAGS