From f418b9530c9a1d3723d599147d6e12c630cebb51 Mon Sep 17 00:00:00 2001
From: Julian Ospald <hasufell@posteo.de>
Date: Fri, 2 Feb 2018 14:13:24 +0100
Upstream: submitted, https://github.com/ja2-stracciatella/ja2-stracciatella/pull/703
Subject: [PATCH] BUILD: fix install paths by utilizing GNUInstallDirs

---
 CMakeLists.txt | 35 ++++++++++++++++++++++-------------
 1 file changed, 22 insertions(+), 13 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index f354370..9ad99f7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -19,6 +19,11 @@ set(JA2_BINARY "ja2")
 set(LAUNCHER_BINARY "ja2-launcher")
 set(CMAKE_CXX_STANDARD 98)
 
+## includes
+if (UNIX AND NOT MINGW AND NOT APPLE)
+	include(GNUInstallDirs)
+endif()
+
 ## Versioning
 
 set(ja2-stracciatella_VERSION_MAJOR "0")
@@ -36,8 +41,16 @@ if (NOT CMAKE_BUILD_TYPE)
     set(CMAKE_BUILD_TYPE "RelWithDebInfo" CACHE STRING "Choose the type of build, options are: Debug RelWithDebInfo." FORCE)
 endif()
 set(VERSION_TAG "" CACHE STRING "Build date for nightly versioning")
-set(EXTRA_DATA_DIR "" CACHE STRING "Directory for externalized data")
-set(INSTALL_LIB_DIR lib CACHE PATH "Installation directory for libraries")
+if (UNIX AND NOT MINGW AND NOT APPLE)
+	set(EXTRA_DATA_DIR "${CMAKE_INSTALL_FULL_DATADIR}/ja2" CACHE STRING "Directory for externalized data (usually just set CMAKE_INSTALL_DATADIR instead)")
+else()
+	set(EXTRA_DATA_DIR "" CACHE STRING "Directory for externalized data")
+endif()
+if (UNIX AND NOT MINGW AND NOT APPLE)
+	set(INSTALL_LIB_DIR ${CMAKE_INSTALL_FULL_LIBDIR})
+else()
+	set(INSTALL_LIB_DIR lib CACHE PATH "Installation directory for libraries")
+endif()
 set(LOCAL_SDL_LIB "" CACHE STRING "Use local SDL library from this directory")
 set(LIBSTRACCIATELLA_TARGET "" CACHE STRING "Rust target architecture for libstracciatella")
 option(LOCAL_FLTK_LIB "Build with fltk lib" OFF)
@@ -316,22 +329,18 @@ set(CPACK_PACKAGE_FILE_NAME "${PROJECT_NAME}_${CPACK_PACKAGE_VERSION}_${PACKAGE_
 include(CPack)
 
 if (UNIX AND NOT MINGW AND NOT APPLE)
-    install(TARGETS ${JA2_BINARY} RUNTIME DESTINATION bin)
+	install(TARGETS ${JA2_BINARY} RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
     if(BUILD_LAUNCHER)
-        install(TARGETS ${LAUNCHER_BINARY} RUNTIME DESTINATION bin)
+        install(TARGETS ${LAUNCHER_BINARY} RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
     endif()
-    install(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/assets/externalized assets/mods assets/unittests DESTINATION share/ja2)
-    install(FILES ${STRACCIATELLA_SHARED_LIB} DESTINATION ${INSTALL_LIB_DIR})
-    install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/assets/distr-files-linux/ja2-stracciatella.desktop DESTINATION share/applications)
+	install(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/assets/externalized assets/mods assets/unittests DESTINATION ${CMAKE_INSTALL_DATADIR}/ja2)
+    install(FILES ${STRACCIATELLA_SHARED_LIB} DESTINATION ${CMAKE_INSTALL_LIBDIR})
+    install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/assets/distr-files-linux/ja2-stracciatella.desktop DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/applications)
     install(
         FILES ${CMAKE_CURRENT_SOURCE_DIR}/assets/icons/logo.svg
         RENAME ja2-stracciatella.svg
-        DESTINATION share/icons/hicolor/scalable/apps)
-    if(${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD|DragonFly|OpenBSD")
-        install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/assets/distr-files-linux/ja2_manpage DESTINATION man/man6 RENAME ja2.6)
-    else()
-        install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/assets/distr-files-linux/ja2_manpage DESTINATION share/man/man6 RENAME ja2.6)
-    endif()
+        DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/icons/hicolor/scalable/apps)
+	install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/assets/distr-files-linux/ja2_manpage DESTINATION ${CMAKE_INSTALL_MANDIR}/man6 RENAME ja2.6)
 else()
     install(TARGETS ${JA2_BINARY} RUNTIME DESTINATION .)
     if(BUILD_LAUNCHER)
-- 
2.16.1