1AC_DEFUN([AX_SUBMODULE],
2[
3
4m4_if(m4_bregexp($2,|,choice),choice,
5	[AC_ARG_WITH($1,
6		[AS_HELP_STRING([--with-$1=$2],
7				[Which $1 to use [default=$3]])])])
8case "system" in
9$2)
10	AC_ARG_WITH($1_prefix,
11		    [AS_HELP_STRING([--with-$1-prefix=DIR],
12				    [Prefix of $1 installation])])
13	AC_ARG_WITH($1_exec_prefix,
14		    [AS_HELP_STRING([--with-$1-exec-prefix=DIR],
15				    [Exec prefix of $1 installation])])
16esac
17m4_if(m4_bregexp($2,build,build),build,
18	[AC_ARG_WITH($1_builddir,
19		[AS_HELP_STRING([--with-$1-builddir=DIR],
20				[Location of $1 builddir])])])
21if test "x$with_$1_prefix" != "x" -a "x$with_$1_exec_prefix" = "x"; then
22	with_$1_exec_prefix=$with_$1_prefix
23fi
24if test "x$with_$1_prefix" != "x" -o "x$with_$1_exec_prefix" != "x"; then
25	if test "x$with_$1" != "x" -a "x$with_$1" != "xyes" -a "x$with_$1" != "xsystem"; then
26		AC_MSG_ERROR([Setting $with_$1_prefix implies use of system $1])
27	fi
28	with_$1="system"
29fi
30if test "x$with_$1_builddir" != "x"; then
31	if test "x$with_$1" != "x" -a "x$with_$1" != "xyes" -a "x$with_$1" != "xbuild"; then
32		AC_MSG_ERROR([Setting $with_$1_builddir implies use of build $1])
33	fi
34	with_$1="build"
35	$1_srcdir=`echo @abs_srcdir@ | $with_$1_builddir/config.status --file=-`
36	AC_MSG_NOTICE($1 sources in $$1_srcdir)
37fi
38if test "x$with_$1_exec_prefix" != "x"; then
39	export PKG_CONFIG_PATH="$with_$1_exec_prefix/lib/pkgconfig${PKG_CONFIG_PATH+:$PKG_CONFIG_PATH}"
40fi
41case "$with_$1" in
42$2)
43	;;
44*)
45	case "$3" in
46	bundled)
47		if test -d $srcdir/.git -a \
48			-d $srcdir/$1 -a \
49			! -d $srcdir/$1/.git; then
50			AC_MSG_WARN([git repo detected, but submodule $1 not initialized])
51			AC_MSG_WARN([You may want to run])
52			AC_MSG_WARN([	git submodule init])
53			AC_MSG_WARN([	git submodule update])
54			AC_MSG_WARN([	sh autogen.sh])
55		fi
56		if test -f $srcdir/$1/configure; then
57			with_$1="bundled"
58		else
59			with_$1="no"
60		fi
61		;;
62	*)
63		with_$1="$3"
64		;;
65	esac
66	;;
67esac
68AC_MSG_CHECKING([which $1 to use])
69AC_MSG_RESULT($with_$1)
70
71])
72