@node ax_var_push
@unnumberedsec ax_var_push

@majorheading Synopsis

@smallexample
AX_VAR_PUSHVALUE(VARIABLE, [VALUE])
@end smallexample

@majorheading Description

Stores a copy of variable_name's value and assigns it to 'value' If no
value is given, its original value is kept. 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:

@smallexample
  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
@end smallexample

@majorheading Source Code

Download the
@uref{http://git.savannah.gnu.org/gitweb/?p=autoconf-archive.git;a=blob_plain;f=m4/ax_var_push.m4,latest
version of @file{ax_var_push.m4}} or browse
@uref{http://git.savannah.gnu.org/gitweb/?p=autoconf-archive.git;a=history;f=m4/ax_var_push.m4,the
macro's revision history}.

@majorheading License

@w{Copyright @copyright{} 2015 Jorge Bellon @email{jbelloncastro@@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 <https://www.gnu.org/licenses/>.

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