From b3db08ffccb78d680d8f7665ad9ed4cff6f92fcf Mon Sep 17 00:00:00 2001
From: Millian Poquet <millian.poquet@inria.fr>
Date: Mon, 10 Dec 2018 18:54:40 +0100
Subject: [PATCH] pkg-config: Use CMake GnuInstallDirs FULL vars

Fixes an installation problem in Nix packages, as non-FULL variables are
already absolute paths in this case.
---
 CMakeLists.txt        | 2 +-
 scripts/pugixml.pc.in | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index ddc5a5ad..e8c4f592 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -76,7 +76,7 @@ install(FILES ${HEADERS} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}${INSTALL_SUFFIX
 install(EXPORT pugixml-config DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/pugixml)
 
 configure_file(scripts/pugixml.pc.in ${PROJECT_BINARY_DIR}/pugixml.pc @ONLY)
-install(FILES ${PROJECT_BINARY_DIR}/pugixml.pc DESTINATION ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}/pkgconfig)
+install(FILES ${PROJECT_BINARY_DIR}/pugixml.pc DESTINATION ${CMAKE_INSTALL_FULL_LIBDIR}/pkgconfig)
 
 if(BUILD_TESTS)
 	file(GLOB TEST_SOURCES tests/*.cpp)
diff --git a/scripts/pugixml.pc.in b/scripts/pugixml.pc.in
index a1678272..f9c3fd45 100644
--- a/scripts/pugixml.pc.in
+++ b/scripts/pugixml.pc.in
@@ -1,7 +1,7 @@
 prefix=@CMAKE_INSTALL_PREFIX@
 exec_prefix=${prefix}
-includedir=${prefix}/include@INSTALL_SUFFIX@
-libdir=${exec_prefix}/@CMAKE_INSTALL_LIBDIR@@INSTALL_SUFFIX@
+includedir=@CMAKE_INSTALL_FULL_INCLUDEDIR@@INSTALL_SUFFIX@
+libdir=@CMAKE_INSTALL_FULL_LIBDIR@@INSTALL_SUFFIX@
 
 Name: pugixml
 Description: Light-weight, simple and fast XML parser for C++ with XPath support.