ax_var_pop (Autoconf Archive)

ax_var_pop

Synopsis

AX_VAR_POPVALUE(VARIABLE)

Description

Restores a variable’s previous value. Compile, link and running tests usually require the programmer to provide additional flags. However, it is strongly recommended not to override flags defined by the user through the configure command. AX_VAR_PUSHVALUE and AX_VAR_POPVALUE are clean way to temporarily store a variable’s value and restore it later, using a stack-like behaviour. This macro supports nesting.

Example:

  AX_VAR_PUSHVALUE([CXXFLAGS],["my test flags"])
  perform some checks with CXXFLAGS...
  CXXFLAGS value will be "my test flags"
  AX_VAR_POPVALUE([CXXFLAGS])
  CXXFLAGS is restored to its original value

Source Code

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

License

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 <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.