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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>
#
# 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.
#serial 15
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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