Add pkg-config support, fixes #187.

pkgconfig/.gitignore

@@ -0,0 +1,2 @@
+einfo.pc
+openrc.pc

pkgconfig/Makefile

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+DIR=	${LIBDIR}/pkgconfig
+SRCS=	einfo.pc.in openrc.pc.in
+INC=	einfo.pc openrc.pc
+
+sed -n -e 's/^VERSION=[[:space:]]*\([^[:space:]]*\).*/#define VERSION "\1${GITVER}\"/p' ../../Makefile > version.h
+
+SED_EXTRA=	-e 's:@VERSION@:${VERSION}:g'
+
+MK=	../mk
+include ../Makefile.inc
+include ${MK}/scripts.mk

pkgconfig/einfo.pc.in

@@ -0,0 +1,9 @@
+prefix=@PREFIX@
+exec_prefix=${prefix}
+libdir=${prefix}/@LIB@
+includedir=/usr/include
+
+Name: einfo
+Description: Pretty console informational display
+Version: @VERSION@
+Libs: -L${libdir} -leinfo

pkgconfig/openrc.pc.in

@@ -0,0 +1,10 @@
+prefix=@PREFIX@
+exec_prefix=${prefix}
+libdir=${prefix}/@LIB@
+includedir=/usr/include
+
+Name: OpenRC
+Description: Universal init system
+Version: @VERSION@
+Cflags: -I${includedir}
+Libs: -L${libdir} -lrc