@node ax_cflags_hpux_option
@unnumberedsec ax_cflags_hpux_option

@majorheading Synopsis

@smallexample
AX_CFLAGS_HPUX_OPTION (optionflag [,[shellvar][,[A][,[NA]]])
@end smallexample

@majorheading Description

AX_CFLAGS_HPUX_OPTION(-Afresh) would show a message as like "checking
CFLAGS for hpux/cc -Afresh ... yes" and adds the optionflag to CFLAGS if
it is understood. You can override the shellvar-default of CFLAGS of
course. The order of arguments stems from the explicit macros like
AX_CFLAGS_WARN_ALL.

The cousin AX_CXXFLAGS_HPUX_OPTION would check for an option to add to
CXXFLAGS - and it uses the autoconf setup for C++ instead of C (since it
is possible to use different compilers for C and C++).

The macro is a lot simpler than any special AX_CFLAGS_* macro (or
ax_cxx_rtti.m4 macro) but allows to check for arbitrary options.
However, if you use this macro in a few places, it would be great if you
would make up a new function-macro and submit it to the ac-archive.

@smallexample
 - $1 option-to-check-for : required ("-option" as non-value)
 - $2 shell-variable-to-add-to : CFLAGS (or CXXFLAGS in the other case)
 - $3 action-if-found : add value to shellvariable
 - $4 action-if-not-found : nothing
@end smallexample

note: in earlier versions, $1-$2 were swapped. We try to detect the
situation and accept a $2=~/-/ as being the old option-to-check-for.

see also: AX_CFLAGS_GCC_OPTION for the widely used original variant.

@majorheading Source Code

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

@majorheading License

@w{Copyright @copyright{} 2008 Guido U. Draheim @email{guidod@@gmx.de}}

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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