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ax_save_flags_with_prefix

Synopsis

AX_SAVE_FLAGS_WITH_PREFIX(PREFIX, LIST-OF-FLAGS)

Description

For each flag in LIST-OF-FLAGS, it expands to lower-cased shell variable with the prefix holding the flag original value. The saved variables can be restored by AX_RESTORE_FLAGS_WITH_PREFIX

As an example: AX_SAVE_FLAGS_WITH_PREFIX([GL], [[CFLAGS],[LIBS]]) expands to

  gl_saved_flag_cflags="$CFLAGS"
  gl_saved_flag_libs="$LIBS"
  CFLAGS="$GL_CFLAGS $CFLAGS"
  LIBS="$GL_LIBS $LIBS"

One common use case is to define a package specific wrapper macro around this one, and also setup other variables if needed. For example:

  AC_DEFUN([_AX_CHECK_GL_SAVE_FLAGS], [
    AX_SAVE_FLAGS_WITH_PREFIX([GL],[$1])
    AC_LANG_PUSH([C])
  ])
   # pushes GL_CFLAGS and GL_LIBS to CFLAGS and LIBS
  # also set the current language to test to C
  _AX_CHECK_GL_SAVE_FLAGS([[CFLAGS],[LIBS]])

Source Code

Download the latest version of ax_save_flags_with_prefix.m4 or browse the macro’s revision history.

License

Copyright © 2016 Felix Chern idryman@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 <https://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.


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