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Workaround for too old GL header on older SDL versions

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Problem: Since the removal of !_IRR_OPENGL_USE_EXTPOINTER_ we require some quite recent
symbols to compile the legacy GL driver. (*) Since the previous commit we prefer including
them via SDL but those are sometimes too old.

(*) This was in fact always a problem since USE_EXTPOINTER is the default.
    I guess people just had recent enough headers usually.
This commit is contained in:
sfan5 2024-02-17 00:51:36 +01:00
parent 3e8d8440e3
commit 54de743641
2 changed files with 20 additions and 2 deletions
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20
source/Irrlicht/CMakeLists.txt
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@ -185,7 +185,7 @@ endif()
if(ENABLE_OPENGL)
add_definitions(-D_IRR_COMPILE_WITH_OPENGL_)
set(OPENGL_DIRECT_LINK TRUE) # not yet possible to remove this
set(OPENGL_DIRECT_LINK TRUE) # driver relies on this
if(DEVICE STREQUAL "WINDOWS")
add_definitions(-D_IRR_COMPILE_WITH_WGL_MANAGER_)
elseif(DEVICE STREQUAL "X11")
@ -269,6 +269,24 @@ if(USE_SDL2)
message(STATUS "Found SDL2: ${SDL2_LIBRARIES}")
endif()
# More special config
if(ENABLE_OPENGL AND DEVICE STREQUAL "SDL")
# The legacy GL driver requires some symbols from GL 4.5 to compile,
# which SDL only provides since 2.26.0 (Nov 2022).
# We have a fallback in case this isn't satisfied so test for it.
set(CMAKE_REQUIRED_INCLUDES ${SDL2_INCLUDE_DIRS})
unset(CHECK_GL_VERSION_4_5 CACHE)
check_cxx_source_compiles("#include <SDL_opengl.h>\n\
#ifndef GL_VERSION_4_5\n\
#error\n\
#endif\n\
int main() {}" CHECK_GL_VERSION_4_5)
if(CHECK_GL_VERSION_4_5)
add_definitions(-DIRR_PREFER_SDL_GL_HEADER)
endif()
endif()
# Platform-specific libs
if(ANDROID)

2
source/Irrlicht/COpenGLCommon.h
View File

@ -6,7 +6,7 @@
#ifdef _IRR_COMPILE_WITH_OPENGL_
#if defined(_IRR_COMPILE_WITH_SDL_DEVICE_)
#if defined(_IRR_COMPILE_WITH_SDL_DEVICE_) && defined(IRR_PREFER_SDL_GL_HEADER)
#include <SDL_video.h>
#include <SDL_opengl.h>
#else