@node ax_append_compile_flags
@unnumberedsec ax_append_compile_flags

@majorheading Synopsis

@smallexample
AX_APPEND_COMPILE_FLAGS([FLAG1 FLAG2 ...], [FLAGS-VARIABLE], [EXTRA-FLAGS], [INPUT])
@end smallexample

@majorheading Description

For every FLAG1, FLAG2 it is checked whether the compiler works with the
flag.  If it does, the flag is added FLAGS-VARIABLE

If FLAGS-VARIABLE is not specified, the current language's flags (e.g.
CFLAGS) is used.  During the check the flag is always added to the
current language's flags.

If EXTRA-FLAGS is defined, it is added to the current language's default
flags (e.g. CFLAGS) when the check is done.  The check is thus made with
the flags: "CFLAGS EXTRA-FLAGS FLAG".  This can for example be used to
force the compiler to issue an error when a bad flag is given.

INPUT gives an alternative input source to AC_COMPILE_IFELSE.

NOTE: This macro depends on the AX_APPEND_FLAG and
AX_CHECK_COMPILE_FLAG. Please keep this macro in sync with
AX_APPEND_LINK_FLAGS.

@majorheading Source Code

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

@majorheading License

@w{Copyright @copyright{} 2011 Maarten Bosmans @email{mkbosmans@@gmail.com}}

Copying and distribution of this file, with or without modification, are
permitted in any medium without royalty provided the copyright notice
and this notice are preserved.  This file is offered as-is, without any
warranty.