#!/bin/sh

# SPDX-License-Identifier: GPL-2.0

srctree=$(dirname "$0")

SHOW_ERROR=

if [ "$1" = "--show-error" ] ; then

	SHOW_ERROR=1

	shift || true

fi

gccplugins_dir=$($3 -print-file-name=plugin)

plugincc=$($1 -E -x c++ - -o /dev/null -I"${srctree}"/gcc-plugins -I"${gccplugins_dir}"/include 2>&1 <<EOF

#include "gcc-common.h"

#if BUILDING_GCC_VERSION >= 4008 || defined(ENABLE_BUILD_WITH_CXX)

#warning $2 CXX

#else

#warning $1 CC

#endif

EOF

)

if [ $? -ne 0 ]

then

	if [ -n "$SHOW_ERROR" ] ; then

		echo "${plugincc}" >&2

	fi

	exit 1

fi

case "$plugincc" in

	*"$1 CC"*)

		echo "$1"

		exit 0

		;;

	*"$2 CXX"*)

		# the c++ compiler needs another test, see below

		;;

	*)

		exit 1

		;;

esac

# we need a c++ compiler that supports the designated initializer GNU extension

plugincc=$($2 -c -x c++ -std=gnu++98 - -fsyntax-only -I"${srctree}"/gcc-plugins -I"${gccplugins_dir}"/include 2>&1 <<EOF

#include "gcc-common.h"

class test {

public:

	int test;

} test = {

	.test = 1

};

EOF

)

if [ $? -eq 0 ]

then

	echo "$2"

	exit 0

fi

if [ -n "$SHOW_ERROR" ] ; then

	echo "${plugincc}" >&2

fi

exit 1