From 852319186a2519f7e1600d3c1b4ff9812b7ecba6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?R=C3=A9mi=20Verschelde?= <rverschelde@gmail.com>
Date: Tue, 3 Sep 2019 08:41:01 +0200
Subject: [PATCH 1/2] pkgconfig: Fix support for absolute lib and include dirs

Using GNUInstallDirs to always have an absolute path regardless of the
user input: https://cmake.org/cmake/help/latest/module/GNUInstallDirs.html
---
 CMakeLists.txt | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index a2bd5092a..94edb6dc6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -273,22 +273,22 @@ endif()
 # .so version
 set_property(TARGET lcf PROPERTY SOVERSION 0)
 
+# installation
+include(GNUInstallDirs)
+
 # pkg-config file generation
 set(PACKAGE_TARNAME ${PROJECT_NAME})
 set(PACKAGE_VERSION ${PROJECT_VERSION})
 set(prefix "${CMAKE_INSTALL_PREFIX}")
 set(exec_prefix "\${prefix}")
-set(libdir "\${exec_prefix}/${CMAKE_INSTALL_LIBDIR}")
-set(includedir "\${prefix}/${CMAKE_INSTALL_INCLUDEDIR}")
+set(libdir "${CMAKE_INSTALL_FULL_LIBDIR}")
+set(includedir "${CMAKE_INSTALL_FULL_INCLUDEDIR}")
 string(REPLACE ";" " " AX_PACKAGE_REQUIRES_PRIVATE "${LIBLCF_DEPS}")
 configure_file(builds/${PROJECT_NAME}.pc.in builds/${PROJECT_NAME}.pc @ONLY)
 
 # Cmake-config file generation
 configure_file(builds/${PROJECT_NAME}-config.cmake.in builds/${PROJECT_NAME}-config.cmake @ONLY)
 
-# installation
-include(GNUInstallDirs)
-
 install(
 	TARGETS lcf
 	ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}

From a1472c67aa4ac26f03e2fb6ebefadae501cb1cc8 Mon Sep 17 00:00:00 2001
From: Ghabry <gabriel+github@mastergk.de>
Date: Sun, 26 Apr 2020 21:44:24 +0200
Subject: [PATCH 2/2] CMake: pkgconfig: Preserve execprefix and support
 absolute lib/include dirs

---
 CMakeLists.txt | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 94edb6dc6..54dbaaafe 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -277,12 +277,21 @@ set_property(TARGET lcf PROPERTY SOVERSION 0)
 include(GNUInstallDirs)
 
 # pkg-config file generation
+set(LCF_LIBDIR ${CMAKE_INSTALL_LIBDIR})
+if(IS_ABSOLUTE ${LCF_LIBDIR})
+	file(RELATIVE_PATH LCF_LIBDIR ${CMAKE_INSTALL_PREFIX} ${LCF_LIBDIR})
+endif()
+set(LCF_INCLUDEDIR ${CMAKE_INSTALL_INCLUDEDIR})
+if(IS_ABSOLUTE ${LCF_INCLUDEDIR})
+	file(RELATIVE_PATH LCF_INCLUDEDIR ${CMAKE_INSTALL_PREFIX} ${LCF_INCLUDEDIR})
+endif()
+
 set(PACKAGE_TARNAME ${PROJECT_NAME})
 set(PACKAGE_VERSION ${PROJECT_VERSION})
 set(prefix "${CMAKE_INSTALL_PREFIX}")
 set(exec_prefix "\${prefix}")
-set(libdir "${CMAKE_INSTALL_FULL_LIBDIR}")
-set(includedir "${CMAKE_INSTALL_FULL_INCLUDEDIR}")
+set(libdir "\${exec_prefix}/${LCF_LIBDIR}")
+set(includedir "\${prefix}/${LCF_INCLUDEDIR}")
 string(REPLACE ";" " " AX_PACKAGE_REQUIRES_PRIVATE "${LIBLCF_DEPS}")
 configure_file(builds/${PROJECT_NAME}.pc.in builds/${PROJECT_NAME}.pc @ONLY)