From d3acd7fa1309b73959a34290cc27c8c91c8180d7 Mon Sep 17 00:00:00 2001
From: =?utf8?q?R=C3=A9mi=20Verschelde?= <rverschelde@gmail.com>
Date: Fri, 18 Nov 2016 23:43:34 +0100
Subject: [PATCH] Win32: Allow linking against system OpenGL (mingw)

Also "fix" detection of system OpenAL on Windows.
---
 .gitlab-ci.yml |  4 ++--
 CMakeLists.txt | 21 ++++++++++-----------
 2 files changed, 12 insertions(+), 13 deletions(-)

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index b4f9c00..b6e0c4f 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -45,7 +45,7 @@ build_mingw32:
     - export PKG_CONFIG_LIBDIR="/usr/i686-w64-mingw32/sys-root/mingw/lib/pkgconfig:/usr/i686-w64-mingw32/sys-root/mingw/share/pkgconfig"
     - export PATH=/usr/i686-w64-mingw32/bin:$PATH
     - mkdir -p i686-w64-mingw32 mingw32-build; cd i686-w64-mingw32
-    - cmake .. -DCMAKE_TOOLCHAIN_FILE=/usr/share/mingw/toolchain-mingw32.cmake -DLUGARU_INSTALL_PREFIX=/builds/osslugaru/lugaru/mingw32-build -DLUGARU_FORCE_INTERNAL_GLU=True -DLUGARU_FORCE_INTERNAL_OPENAL=True -DLUGARU_FORCE_INTERNAL_OPENGL=True
+    - cmake .. -DCMAKE_TOOLCHAIN_FILE=/usr/share/mingw/toolchain-mingw32.cmake -DLUGARU_INSTALL_PREFIX=/builds/osslugaru/lugaru/mingw32-build
     - make -j4; make install
   artifacts:
     expire_in: 7d
@@ -61,7 +61,7 @@ build_mingw64:
     - export PKG_CONFIG_LIBDIR="/usr/x86_64-w64-mingw32/sys-root/mingw/lib/pkgconfig:/usr/x86_64-w64-mingw32/sys-root/mingw/share/pkgconfig"
     - export PATH=/usr/x86_64-w64-mingw32/bin:$PATH
     - mkdir -p x86_64-w64-mingw32 mingw64-build; cd x86_64-w64-mingw32
-    - cmake .. -DCMAKE_TOOLCHAIN_FILE=/usr/share/mingw/toolchain-mingw64.cmake -DLUGARU_INSTALL_PREFIX=/builds/osslugaru/lugaru/mingw64-build -DLUGARU_FORCE_INTERNAL_GLU=True- -DLUGARU_FORCE_INTERNAL_OPENAL=True -DLUGARU_FORCE_INTERNAL_OPENGL=True
+    - cmake .. -DCMAKE_TOOLCHAIN_FILE=/usr/share/mingw/toolchain-mingw64.cmake -DLUGARU_INSTALL_PREFIX=/builds/osslugaru/lugaru/mingw64-build
     - make -j4; make install
   artifacts:
     expire_in: 7d
diff --git a/CMakeLists.txt b/CMakeLists.txt
index e715fff..44ea757 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -186,16 +186,10 @@ endif (APPLE)
 # Deal with dependencies...
 find_package(OpenGL REQUIRED)
 # force this include dir no matter what on Windows, so we get sane headers.
-if(NOT WIN32)
-    option (LUGARU_FORCE_INTERNAL_OPENGL "Force internal OpenGL headers, even if there's a system version" True)
-    if (LUGARU_FORCE_INTERNAL_OPENGL)
-        include_directories("${DEPDIR}/OpenGL")
-    endif (LUGARU_FORCE_INTERNAL_OPENGL)
-endif(NOT WIN32)
-
-if(WIN32)
+option (LUGARU_FORCE_INTERNAL_OPENGL "Force internal OpenGL headers, even if there's a system version" True)
+if (LUGARU_FORCE_INTERNAL_OPENGL)
     include_directories("${DEPDIR}/OpenGL")
-endif(WIN32)
+endif (LUGARU_FORCE_INTERNAL_OPENGL)
 
 if(MSVC) # More Visual Studio annoyances
     include_directories("${DEPDIR}/msinttypes")
@@ -203,7 +197,12 @@ endif(MSVC)
 
 option (LUGARU_FORCE_INTERNAL_OPENAL "Force internal libOpenAL, even if there's a system version" False)
 if (NOT LUGARU_FORCE_INTERNAL_OPENAL)
-    find_package(OpenAL REQUIRED)
+    # FIXME: We should remove bundled libs and allow building OpenAL from source, for all platforms
+    if (WIN32)
+        find_package(OpenAL)
+    else (WIN32)
+        find_package(OpenAL REQUIRED)
+    endif()
 else(NOT LUGARU_FORCE_INTERNAL_OPENAL)
     set(OPENAL_FOUND False)
 endif (NOT LUGARU_FORCE_INTERNAL_OPENAL)
@@ -445,7 +444,7 @@ include_directories(
     ${CMAKE_SOURCE_DIR}/Source
 )
 
-set(LUGARU_LIBS ${OPENAL_LIBRARY} ${PNG_LIBRARY} ${JPEG_LIBRARY} ${ZLIB_LIBRARIES} ${SDL2_LIBRARIES} ${OPENGL_glu_LIBRARY} ${VORBISFILE_LIBRARY} ${OGG_LIBRARY} ${PLATFORM_LIBS})
+set(LUGARU_LIBS ${OPENAL_LIBRARY} ${PNG_LIBRARY} ${JPEG_LIBRARY} ${ZLIB_LIBRARIES} ${SDL2_LIBRARIES} ${OPENGL_gl_LIBRARY} ${OPENGL_glu_LIBRARY} ${VORBISFILE_LIBRARY} ${OGG_LIBRARY} ${PLATFORM_LIBS})
 
 
 if(WIN32)
-- 
2.39.5