From: Harmen Stoppels <me@harmenstoppels.nl>
Date: Mon, 24 Jul 2023 09:37:31 +0000 (+0200)
Subject: relocatable pc files by default, while allowing discouraged absolute paths for CMAKE_... 
X-Git-Tag: 2.1.4~49
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e13bc3af6892a1decb0260ce475d5b2aa9da94f4;p=thirdparty%2Fzlib-ng.git

relocatable pc files by default, while allowing discouraged absolute paths for CMAKE_INSTALL_[LIB|INCLUDE]DIR
---

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5dacc286a..47562a343 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -938,8 +938,19 @@ if(NOT CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_CURRENT_BINARY_DIR)
     endif()
 endif()
 
-set(PC_INC_INSTALL_DIR "${CMAKE_INSTALL_FULL_INCLUDEDIR}")
-set(PC_LIB_INSTALL_DIR "${CMAKE_INSTALL_FULL_LIBDIR}")
+# The user is allowed (but discouraged) to set absolute CMAKE_INSTALL_*DIR paths.
+# If they do, we copy these non-relocatable paths into the pkg-config file.
+if(IS_ABSOLUTE "${CMAKE_INSTALL_INCLUDEDIR}")
+    set(PC_INC_INSTALL_DIR "${CMAKE_INSTALL_INCLUDEDIR}")
+else()
+    set(PC_INC_INSTALL_DIR "\${prefix}/${CMAKE_INSTALL_INCLUDEDIR}")
+endif()
+
+if(IS_ABSOLUTE "${CMAKE_INSTALL_LIBDIR}")
+    set(PC_LIB_INSTALL_DIR "${CMAKE_INSTALL_LIBDIR}")
+else()
+    set(PC_LIB_INSTALL_DIR "\${exec_prefix}/${CMAKE_INSTALL_LIBDIR}")
+endif()
 
 #============================================================================
 # zlib