1# backwards compat with older pkg-config
2# source: https://github.com/varnish/libvmod-example/pull/18
3# - pull in AC_DEFUN from pkg.m4
4#
5# PKG_CHECK_VAR(VARIABLE, MODULE, CONFIG-VARIABLE,
6# [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
7# -------------------------------------------
8# Retrieves the value of the pkg-config variable for the given module.
9#
10m4_ifndef([PKG_CHECK_VAR], [
11AC_DEFUN([PKG_CHECK_VAR],
12[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
13AC_ARG_VAR([$1], [value of $3 for $2, overriding pkg-config])dnl
14
15_PKG_CONFIG([$1], [variable="][$3]["], [$2])
16AS_VAR_COPY([$1], [pkg_cv_][$1])
17
18AS_VAR_IF([$1], [""], [$5], [$4])dnl
19])
20])
21