1# PKG_PROG_PKG_CONFIG([MIN-VERSION])
2# ----------------------------------
3AC_DEFUN([PKG_PROG_PKG_CONFIG],
4[m4_pattern_forbid([^_?PKG_[A-Z_]+$])
5m4_pattern_allow([^PKG_CONFIG(_PATH)?$])
6AC_ARG_VAR([PKG_CONFIG], [path to pkg-config utility])
7AC_ARG_VAR([PKG_CONFIG_PATH], [directories to add to pkg-config's search path])
8AC_ARG_VAR([PKG_CONFIG_LIBDIR], [path overriding pkg-config's built-in search path])
9
10if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then
11	AC_PATH_TOOL([PKG_CONFIG], [pkg-config])
12fi
13if test -n "$PKG_CONFIG"; then
14	_pkg_min_version=m4_default([$1], [0.9.0])
15	AC_MSG_CHECKING([pkg-config is at least version $_pkg_min_version])
16	if $PKG_CONFIG --atleast-pkgconfig-version $_pkg_min_version; then
17		AC_MSG_RESULT([yes])
18	else
19		AC_MSG_RESULT([no])
20		PKG_CONFIG=""
21	fi
22fi[]dnl
23])# PKG_PROG_PKG_CONFIG
24
25# PKG_CHECK_EXISTS(MODULES, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
26#
27# Check to see whether a particular set of modules exists.  Similar
28# to PKG_CHECK_MODULES(), but does not set variables or print errors.
29#
30# Please remember that m4 expands AC_REQUIRE([PKG_PROG_PKG_CONFIG])
31# only at the first occurence in configure.ac, so if the first place
32# it's called might be skipped (such as if it is within an "if", you
33# have to call PKG_CHECK_EXISTS manually
34# --------------------------------------------------------------
35AC_DEFUN([PKG_CHECK_EXISTS],
36[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
37if test -n "$PKG_CONFIG" && \
38    AC_RUN_LOG([$PKG_CONFIG --exists --print-errors "$1"]); then
39  m4_default([$2], [:])
40m4_ifvaln([$3], [else
41  $3])dnl
42fi])
43
44# _PKG_CONFIG([VARIABLE], [COMMAND], [MODULES])
45# ---------------------------------------------
46m4_define([_PKG_CONFIG],
47[if test -n "$$1"; then
48    pkg_cv_[]$1="$$1"
49 elif test -n "$PKG_CONFIG"; then
50    PKG_CHECK_EXISTS([$3],
51                     [pkg_cv_[]$1=`$PKG_CONFIG --[]$2 "$3" 2>/dev/null`],
52		     [pkg_failed=yes])
53 else
54    pkg_failed=untried
55fi[]dnl
56])# _PKG_CONFIG
57
58# _PKG_SHORT_ERRORS_SUPPORTED
59# -----------------------------
60AC_DEFUN([_PKG_SHORT_ERRORS_SUPPORTED],
61[AC_REQUIRE([PKG_PROG_PKG_CONFIG])
62if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
63        _pkg_short_errors_supported=yes
64else
65        _pkg_short_errors_supported=no
66fi[]dnl
67])# _PKG_SHORT_ERRORS_SUPPORTED
68
69
70# PKG_CHECK_MODULES(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND],
71# [ACTION-IF-NOT-FOUND])
72#
73#
74# Note that if there is a possibility the first call to
75# PKG_CHECK_MODULES might not happen, you should be sure to include an
76# explicit call to PKG_PROG_PKG_CONFIG in your configure.ac
77#
78#
79# --------------------------------------------------------------
80AC_DEFUN([PKG_CHECK_MODULES],
81[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
82AC_ARG_VAR([$1][_CFLAGS], [C compiler flags for $1, overriding pkg-config])dnl
83AC_ARG_VAR([$1][_LIBS], [linker flags for $1, overriding pkg-config])dnl
84
85pkg_failed=no
86AC_MSG_CHECKING([for $1])
87
88_PKG_CONFIG([$1][_CFLAGS], [cflags], [$2])
89_PKG_CONFIG([$1][_LIBS], [libs], [$2])
90
91m4_define([_PKG_TEXT], [Alternatively, you may set the environment variables $1[]_CFLAGS
92and $1[]_LIBS to avoid the need to call pkg-config.
93See the pkg-config man page for more details.])
94
95if test $pkg_failed = yes; then
96   	AC_MSG_RESULT([no])
97        _PKG_SHORT_ERRORS_SUPPORTED
98        if test $_pkg_short_errors_supported = yes; then
99	        $1[]_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors "$2" 2>&1`
100        else
101	        $1[]_PKG_ERRORS=`$PKG_CONFIG --print-errors "$2" 2>&1`
102        fi
103	# Put the nasty error message in config.log where it belongs
104	echo "$$1[]_PKG_ERRORS" >&AS_MESSAGE_LOG_FD
105
106	m4_default([$4], [AC_MSG_ERROR(
107[Package requirements ($2) were not met:
108
109$$1_PKG_ERRORS
110
111Consider adjusting the PKG_CONFIG_PATH environment variable if you
112installed software in a non-standard prefix.
113
114_PKG_TEXT])dnl
115        ])
116elif test $pkg_failed = untried; then
117     	AC_MSG_RESULT([no])
118	m4_default([$4], [AC_MSG_FAILURE(
119[The pkg-config script could not be found or is too old.  Make sure it
120is in your PATH or set the PKG_CONFIG environment variable to the full
121path to pkg-config.
122
123_PKG_TEXT
124
125To get pkg-config, see <http://pkg-config.freedesktop.org/>.])dnl
126        ])
127else
128	$1[]_CFLAGS=$pkg_cv_[]$1[]_CFLAGS
129	$1[]_LIBS=$pkg_cv_[]$1[]_LIBS
130        AC_MSG_RESULT([yes])
131	$3
132fi[]dnl
133])# PKG_CHECK_MODULES
134