Policycoreutils: Make pkg-config work for more types of builds

To support static builds, pkg-config is used to add the libraries
needed for libselinux and libsemanage during the build. Unforunately,
pkg-config will always use the installed pc files for libselinux and
libsemanage.

Instead set PKG_CONFIG_PATH when invoking pkg-config so that
it searches in order:
1) The directory specified by PKG_CONFIG_PATH, if already set.
2) The local src directories of libselinux and libsemaange.
3) The default directories specified by the system.

Signed-off-by: James Carter <[email protected]>

Author: jwcart2

policycoreutils/Makefile

@@ -2,8 +2,8 @@ SUBDIRS = setfiles load_policy newrole run_init secon sestatus semodule setseboo
 
 PKG_CONFIG ?= pkg-config
 
-LIBSELINUX_LDLIBS := $(shell $(PKG_CONFIG) --libs libselinux)
-LIBSEMANAGE_LDLIBS := $(shell $(PKG_CONFIG) --libs libsemanage)
+LIBSELINUX_LDLIBS := $(shell PKG_CONFIG_PATH="$(PKG_CONFIG_PATH):../libselinux/src" $(PKG_CONFIG) --libs libselinux)
+LIBSEMANAGE_LDLIBS := $(shell PKG_CONFIG_PATH="$(PKG_CONFIG_PATH):../libsemanage/src" $(PKG_CONFIG) --libs libsemanage)
 export LIBSELINUX_LDLIBS LIBSEMANAGE_LDLIBS
 
 all install relabel clean indent: