#!/bin/sh

if [ "$1" = "-p" ]; then
	shift; exec 3>&2
else
	exec 3> /dev/null
fi

if [ "$1" = "-v" ]; then
	shift
else
	exec 2> /dev/null
fi

cc_lang="c"
cc_main=""
retcode="0"
result=""

test_prog() {
	if echo "$1" | $CC $CFLAGS $LDFLAGS $2 \
		-x $cc_lang - -o $tmpfile >&2
	then result=1; else result=0; fi
}

test_header() {
	local includes=""
	for hdr in $1; do
		includes="$includes
			#include <$hdr>"
	done; shift
	test_prog "$includes
		int main() { $cc_main return 0; }" "$@"
}

{
	echo "SYSTEM  = $1"
	echo "CC      = $CC"
	echo "CXX     = $CXX"
	echo "CFLAGS  = $CFLAGS"
	echo "LDFLAGS = $LDFLAGS"
} >&2

if [ -f config.cache ]; then
	. ./config.cache
	eval "cached_result=\$cached_syscheck_result_$1"
	if [ -n "$cached_result" ]; then
		echo $cached_result
		exit $retcode
	fi
fi

tmpfile=`mktemp /tmp/spl_syscheck.XXXXXX`

echo -n "Checking for $1:" >&3

case "$1" in
	pcre)
		test_header "pcre.h" "$(pcre-config --cflags)"
		;;
	expat)
		test_header "expat.h"
		;;
	sqlite)
		test_header "sqlite3.h"
		;;
	mysql)
		test_header "mysql/mysql.h"
		;;
	postgres)
		test_header "libpq-fe.h" "-I$(pg_config --includedir)/."
		;;
	libxml2)
		test_header "libxml/parser.h" "$(xml2-config --cflags)"
		;;
	libxslt)
		test_header "libexslt/exslt.h" "$(xslt-config --cflags)"
		;;
	libsdl)
		test_header "SDL/SDL_image.h" "$(sdl-config --cflags)"
		;;
	libcurl)
		cc_main="if (CURLOPT_FTP_ACCOUNT != 0) {}";
		test_header "curl/curl.h" "$(curl-config --cflags)"
		;;
	libuuid)
		test_header "uuid/uuid.h" "-luuid"
		;;
	libfann)
		if pkg-config --silence-errors --modversion fann | grep -qx '2.0.0'
		then result=1; else result=0; fi
		;;
	wscons)
		result=0
		[ -f /usr/include/dev/wscons/wsconsio.h ] && result=1
		;;
	epfb)
		result=0
		[ -c /dev/epfb ] && result=1
		[ -c /dev/epfb0 ] && result=1
		;;
	opengl|opengl_file)
		set -vx
		result=0
		for file in /usr/include/GL/gl.h /usr/X11/include/GL/gl.h /usr/X11R6/include/GL/gl.h; do
			[ -f "$file" ] && { result="$file"; break; }
		done
		
		if [ "$1" = "opengl" ]; then
			[ "$result" = "0" ] || result=1
		else
			[ "$result" = "0" ] && result=""
		fi
		;;
	libsmoke)
		cc_lang="c++"; CC="$CXX"
		CFLAGS="`echo $CFLAGS | sed 's,-std=gnu99,,'`"
		test_header "smoke.h"
		## remove the following line to build SPL with Qt 3.x support ##
		result="0"
		;;
	libsmoke_config)
		echo "#include <smoke.h>" | $CC $CFLAGS -E - > $tmpfile
		grep -q mf_ctor $tmpfile || echo "-DSMOKE_WITHOUT_MF_CTOR"
		;;
	readline)
		test_header "stdio.h readline/readline.h"
		;;
	gettext_libc)
		if $CC -o $tmpfile -x c - >&2 <<- EOT
			#include <locale.h>
			#include <libintl.h>
			int main() {
			  textdomain(0);
			  return 0;
			}
		EOT
		then result=1; else result=0; fi
		;;
	gettext_intl)
		if $CC -o $tmpfile -x c - -lintl >&2 <<- EOT
			#include <locale.h>
			#include <libintl.h>
			int main() {
			  textdomain(0);
			  return 0;
			}
		EOT
		then result=1; else result=0; fi
		;;
	pthread)
		if $CC -pthread -o $tmpfile -x c - >&2 <<- EOT
			#include <pthread.h>
			int main() {
			  pthread_t foobar;
			  pthread_create(&foobar, 0, 0, 0);
			  return 0;
			}
		EOT
		then result=1; else result=0; fi
		;;
	extra_cflags)
		for dir in \
			/usr/include/kde				\
			/usr/include/qt3				\
			/opt/kde*/include				\
			/opt/qt3*/include				\
			/opt/mysql*/include				\
			/usr/lib/qt*/include				\
			/usr/lib32/qt*/include				\
			/usr/lib64/qt*/include				\
			/usr/local/include				\
			/opt/local/include				\
			/usr/nekoware/include				\
			/usr/nekoware/mysql/include			\
			/usr/nekoware/pgsql/include			\
			/usr/pkg/include
		do
			[ -d $dir ] && echo "-I$dir"
		done
		;;
	extra_ldflags)
		for dir in \
			/opt/kde*/lib					\
			/opt/kde*/lib32					\
			/opt/kde*/lib64					\
			/opt/qt*/lib					\
			/opt/qt*/lib32					\
			/opt/qt*/lib64					\
			/opt/mysql*/lib					\
			/opt/mysql*/lib32				\
			/opt/mysql*/lib64				\
			/usr/lib/qt*/lib				\
			/usr/lib32/qt*/lib				\
			/usr/lib64/qt*/lib				\
			/usr/lib/mysql					\
			/usr/lib32/mysql				\
			/usr/lib64/mysql				\
			/usr/local/lib					\
			/opt/local/lib					\
			/usr/local/lib32				\
			/opt/local/lib32				\
			/usr/local/lib64				\
			/opt/local/lib64				\
			/usr/nekoware/lib				\
			/usr/nekoware/mysql/lib				\
			/usr/nekoware/pgsql/lib				\
			/usr/pkg/lib
		do
			[ -d $dir ] && echo "-L$dir"
		done
		;;
	*)
		echo "Usage: $0 {mode}"
		retcode=1
esac

if [ -n "$result" ]; then
	echo "cached_syscheck_result_$1=$result" >> config.cache
	[ "$result" = "0" ] && echo " not found." >&3
	[ "$result" = "0" ] || echo " found." >&3
else
	echo " done." >&3
fi

if [ -n "$result" ]; then
	echo $result
fi

rm -f $tmpfile
exit $retcode