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# Copyright (c) 2015 Lucas De Marchi <lucas.de.marchi@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 2 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
# 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.
#
# CC_FEATURE_APPEND([FLAGS], [ENV-TO-CHECK], [FLAG-NAME])
AC_DEFUN([CC_FEATURE_APPEND], [
AS_VAR_PUSHDEF([FLAGS], [$1])dnl
AS_VAR_PUSHDEF([ENV_CHECK], [$2])dnl
AS_VAR_PUSHDEF([FLAG_NAME], [$3])dnl
AS_CASE([" AS_VAR_GET(FLAGS) " ],
[*" FLAG_NAME "*], [AC_RUN_LOG([: FLAGS already contains FLAG_NAME])],
[
AS_IF([test "x$FLAGS" != "x"], [AS_VAR_APPEND(FLAGS, " ")])
AS_IF([test "x$ENV_CHECK" = "xyes"],
[AS_VAR_APPEND(FLAGS, "+FLAG_NAME")],
[AS_VAR_APPEND(FLAGS, "-FLAG_NAME")])
]
)
AS_VAR_POPDEF([FLAG_NAME])dnl
AS_VAR_POPDEF([ENV_CHECK])dnl
AS_VAR_POPDEF([FLAGS])dnl
])
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