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# ===========================================================================
# https://www.gnu.org/software/autoconf-archive/ax_cflags_irix_option.html
# ===========================================================================
#
# SYNOPSIS
#
# AX_CFLAGS_IRIX_OPTION (optionflag [,[shellvar][,[A][,[NA]]])
#
# DESCRIPTION
#
# AX_CFLAGS_IRIX_OPTION(-go_for_it) would show a message as like "checking
# CFLAGS for irix/cc -go_for_it ... 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_IRIX_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.
#
# - $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
#
# 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.
#
# LICENSE
#
# Copyright (c) 2008 Guido U. Draheim <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/>.
#
# 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.
#serial 14
AC_DEFUN([AX_FLAGS_IRIX_OPTION_PRIVATE], [dnl
AX_CHECK_COMPILE_FLAG([$1], [flag_ok="yes"], [flag_ok="no"], [-fullwarn -use_readonly_const])
AS_CASE([".$flag_ok"],
[.ok|.ok,*], [$3],
[.|.no|.no,*], [$4],
[m4_default($3,[AX_APPEND_FLAG([$1],[$2])])])
])
AC_DEFUN([AX_CFLAGS_IRIX_OPTION],[
AC_LANG_PUSH([C])
AX_FLAGS_IRIX_OPTION_PRIVATE(ifelse(m4_bregexp([$2],[-]),-1,[[$1],[$2]],[[$2],[$1]]),[$3],[$4])
AC_LANG_POP
])
AC_DEFUN([AX_CXXFLAGS_IRIX_OPTION],[
AC_LANG_PUSH([C++])
AX_FLAGS_IRIX_OPTION_PRIVATE(ifelse(m4_bregexp([$2],[-]),-1,[[$1],[$2]],[[$2],[$1]]),[$3],[$4])
AC_LANG_POP
])
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