Fix .pc file paths

Signed-off-by: Vladislav Shchapov <vladislav@shchapov.ru>

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0dcd76be625bbb73c77f250313eca5708abdd5c0..8fba45535ee91945a71114078fd4a5a21a500bc0 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -927,17 +927,24 @@ endif()
 
 # Refer to prefix symbolically to ease relocation by end user,
 # as Makefile-generated .pc file does.
+string(FIND "${CMAKE_INSTALL_INCLUDEDIR}" "${CMAKE_INSTALL_PREFIX}/" INCLUDEDIR_POS)
+string(FIND "${CMAKE_INSTALL_LIBDIR}" "${CMAKE_INSTALL_PREFIX}/" LIBDIR_POS)
+string(LENGTH "${CMAKE_INSTALL_PREFIX}/" INSTALL_PREFIX_LEN)
+
 if(NOT IS_ABSOLUTE "${CMAKE_INSTALL_INCLUDEDIR}")
   set(PC_INC_INSTALL_DIR "\${prefix}/${CMAKE_INSTALL_INCLUDEDIR}")
-elseif(CMAKE_INSTALL_INCLUDEDIR STREQUAL "${CMAKE_INSTALL_PREFIX}/include")
-  set(PC_INC_INSTALL_DIR "\${prefix}/include")
+elseif(INCLUDEDIR_POS EQUAL 0)
+  string(SUBSTRING "${CMAKE_INSTALL_INCLUDEDIR}" "${INSTALL_PREFIX_LEN}" "-1" INCLUDEDIR_RELATIVE)
+  set(PC_INC_INSTALL_DIR "\${prefix}/${INCLUDEDIR_RELATIVE}")
 else()
   set(PC_INC_INSTALL_DIR "${CMAKE_INSTALL_INCLUDEDIR}")
 endif()
+
 if(NOT IS_ABSOLUTE "${CMAKE_INSTALL_LIBDIR}")
   set(PC_LIB_INSTALL_DIR "\${exec_prefix}/${CMAKE_INSTALL_LIBDIR}")
-elseif(CMAKE_INSTALL_LIBDIR STREQUAL "${CMAKE_INSTALL_PREFIX}/lib")
-  set(PC_LIB_INSTALL_DIR "\${exec_prefix}/lib")
+elseif(LIBDIR_POS EQUAL 0)
+  string(SUBSTRING "${CMAKE_INSTALL_LIBDIR}" "${INSTALL_PREFIX_LEN}" "-1" LIBDIR_RELATIVE)
+  set(PC_LIB_INSTALL_DIR "\${exec_prefix}/${LIBDIR_RELATIVE}")
 else()
   set(PC_LIB_INSTALL_DIR "${CMAKE_INSTALL_LIBDIR}")
 endif()