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Diffstat (limited to '')
| -rw-r--r-- | m4/features.m4 | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/m4/features.m4 b/m4/features.m4 new file mode 100644 index 0000000..82a244f --- /dev/null +++ b/m4/features.m4 @@ -0,0 +1,48 @@ +# 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 +]) |