From 523288fa71bba2bb223e7ffbc68f5ebe55118ebd Mon Sep 17 00:00:00 2001
From: Harald Sitter <sitter@kde.org>
Date: Wed, 28 May 2014 16:22:58 +0200
Subject: [PATCH] import relative dir resolution workaround from
 CMakePackageConfigHelpers

this prevents the install path resolution from going wrong when symlinks
are involved in /usr/lib* (e.g. the case on Fedora).

the result of not having this workaround is that the install dir will be
resolved as '/' resulting in bogus paths for cmake config users (e.g.
include dir would be set to //include/$soname)

note: this was not actually tested on an affected system, weeh
---
 CMakeLists.txt        | 19 +++++++++++++++++++
 PhononConfig.cmake.in |  1 +
 2 files changed, 20 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8d7f0d9..6130885 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -225,6 +225,25 @@ set(CMAKECONFIG_INSTALL_DIR ${LIB_INSTALL_DIR}/cmake/${PHONON_LIB_SONAME} )
 # runtime different from the chosen CMAKE_INSTALL_PREFIX if under Windows the package was installed anywhere)
 # This relative path will be configured into the PhononConfig.cmake
 file(RELATIVE_PATH relInstallDir ${CMAKE_INSTALL_PREFIX}/${CMAKECONFIG_INSTALL_DIR} ${CMAKE_INSTALL_PREFIX} )
+make_abs_install_path(absInstallDir ${CMAKECONFIG_INSTALL_DIR})
+
+# Exciting code copy from CMakePackageConfigHelpers to avoid the pain from porting
+# to it for the 4.x series.
+# The set variable is used by the PhononConfig.cmake.in to use a refined rootDir
+# resolution when installed to /usr/lib
+if("${absInstallDir}" MATCHES "^(/usr)?/lib(64)?/.+")
+    # Handle "/usr move" symlinks created by some Linux distros.
+    set(USR_SYMLINK_RESOLVER "
+        # Use original install prefix when loaded through a \"/usr move\"
+        # cross-prefix symbolic link such as /lib -> /usr/lib.
+        get_filename_component(_realCurr \"\${CMAKE_CURRENT_LIST_DIR}\" REALPATH)
+        get_filename_component(_realOrig \"${absInstallDir}\" REALPATH)
+        if(_realCurr STREQUAL _realOrig)
+            set(rootDir \"${CMAKE_INSTALL_PREFIX}\")
+        endif()
+        unset(_realOrig)
+        unset(_realCurr)")
+endif()
 
 configure_file(${CMAKE_CURRENT_SOURCE_DIR}/PhononConfig.cmake.in ${CMAKE_CURRENT_BINARY_DIR}/${PHONON_LIB_SONAME_CAMEL}Config.cmake @ONLY)
 configure_file(${CMAKE_CURRENT_SOURCE_DIR}/PhononConfigVersion.cmake.in ${CMAKE_CURRENT_BINARY_DIR}/${PHONON_LIB_SONAME_CAMEL}ConfigVersion.cmake @ONLY)
diff --git a/PhononConfig.cmake.in b/PhononConfig.cmake.in
index f3962cb..f1f3e7c 100644
--- a/PhononConfig.cmake.in
+++ b/PhononConfig.cmake.in
@@ -5,6 +5,7 @@ set(PHONON_VERSION "@PHONON_LIB_MAJOR_VERSION@.@PHONON_LIB_MINOR_VERSION@.@PHONO
 
 get_filename_component(currentDir ${CMAKE_CURRENT_LIST_FILE} PATH) # get the directory where I myself am
 get_filename_component(rootDir ${currentDir}/@relInstallDir@ ABSOLUTE) # get the chosen install prefix
+@USR_SYMLINK_RESOLVER@
 
 set(PHONON_NO_GRAPHICSVIEW @PHONON_NO_GRAPHICSVIEW@)
 set(PHONON_PULSESUPPORT @PHONON_PULSESUPPORT@)
-- 
1.9.3