From c1f514f3dbc22e56b2d6821f461aa058bd3104c3 Mon Sep 17 00:00:00 2001
From: Eddy Jansson <eddy@klopper.net>
Date: Sat, 24 Jul 2021 13:43:35 +0200
Subject: Expand use of pkg-config variables.

Change pkg-config generation such that the path variables,
not their values, are used in the definitions of Libs and Cflags,
and that $prefix is substituted into libdir and includedir iff
they start with its value.

This makes it easier to modify the already installed file if necessary.
---
 lib/Makefile     | 1 +
 lib/liblz4.pc.in | 4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/Makefile b/lib/Makefile
index 344120a..45f33e4 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -175,6 +175,7 @@ liblz4.pc: liblz4.pc.in Makefile
          -e 's|@LIBDIR@|$(libdir)|' \
          -e 's|@INCLUDEDIR@|$(includedir)|' \
          -e 's|@VERSION@|$(LIBVER)|' \
+         -e 's|=${prefix}/|=$${prefix}/|' \
           $< >$@
 
 install: lib liblz4.pc
diff --git a/lib/liblz4.pc.in b/lib/liblz4.pc.in
index 211477f..ed52214 100644
--- a/lib/liblz4.pc.in
+++ b/lib/liblz4.pc.in
@@ -10,5 +10,5 @@ Name: lz4
 Description: extremely fast lossless compression algorithm library
 URL: http://www.lz4.org/
 Version: @VERSION@
-Libs: -L@LIBDIR@ -llz4
-Cflags: -I@INCLUDEDIR@
+Libs: -L${libdir} -llz4
+Cflags: -I${includedir}
-- 
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