1berry/qtbase
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Fix GLESv2 linkage with Emscripten

Browse Source 
There's no library to link against and the headers are in the system, so
we can create a synthetic import library after verifying the
compilation.

Change-Id: I9baa32cfe06f2f48adf066d558aa69646143efd0
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
Reviewed-by: Qt CMake Build Bot
This commit is contained in:
Simon Hausmann 2019-08-29 17:00:56 +02:00
parent 4b592ba90c
commit 2fd3b44697
1 changed files with 29 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

47
cmake/FindGLESv2.cmake
View File

@ -1,14 +1,18 @@
include(CheckCXXSourceCompiles)
find_library(GLESv2_LIBRARY NAMES GLESv2)
find_path(GLESv2_INCLUDE_DIR NAMES "GLES2/gl2.h" DOC "The OpenGLES 2 include path")
# No library linkage is necessary to use GLESv2 with Emscripten. The headers are also
# system headers, so we don't need to search for them.
if(EMSCRIPTEN)
set(HAVE_GLESv2 ON)
else()
find_library(GLESv2_LIBRARY NAMES GLESv2)
find_path(GLESv2_INCLUDE_DIR NAMES "GLES2/gl2.h" DOC "The OpenGLES 2 include path")
set(_libraries "${CMAKE_REQUIRED_LIBRARIES}")
list(APPEND CMAKE_REQUIRED_LIBRARIES "${GLESv2_LIBRARY}")
set(_includes "${CMAKE_REQUIRED_INCLUDES}")
list(APPEND CMAKE_REQUIRED_INCLUDES "${GLESv2_INCLUDE_DIR}")
set(_libraries "${CMAKE_REQUIRED_LIBRARIES}")
list(APPEND CMAKE_REQUIRED_LIBRARIES "${GLESv2_LIBRARY}")
set(_includes "${CMAKE_REQUIRED_INCLUDES}")
list(APPEND CMAKE_REQUIRED_INCLUDES "${GLESv2_INCLUDE_DIR}")
check_cxx_source_compiles("
check_cxx_source_compiles("
#ifdef __APPLE__
# include <OpenGLES/ES2/gl.h>
#else
@ -21,20 +25,27 @@ int main(int argc, char *argv[]) {
glClear(GL_COLOR_BUFFER_BIT);
}" HAVE_GLESv2)
set(CMAKE_REQUIRED_LIBRARY "${_libraries}")
unset(_libraries)
set(CMAKE_REQUIRED_INCLUDES "${_includes}")
unset(_includes)
set(CMAKE_REQUIRED_LIBRARY "${_libraries}")
unset(_libraries)
set(CMAKE_REQUIRED_INCLUDES "${_includes}")
unset(_includes)
set(package_args GLESv2_INCLUDE_DIR GLESv2_LIBRARY HAVE_GLESv2)
endif()
list(APPEND package_args HAVE_GLESv2)
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(GLESv2 DEFAULT_MSG GLESv2_INCLUDE_DIR GLESv2_LIBRARY HAVE_GLESv2)
find_package_handle_standard_args(GLESv2 DEFAULT_MSG ${package_args})
mark_as_advanced(GLESv2_INCLUDE_DIR GLESv2_LIBRARY HAVE_GLESv2)
mark_as_advanced(${package_args})
if(GLESv2_FOUND AND NOT TARGET GLESv2::GLESv2)
add_library(GLESv2::GLESv2 UNKNOWN IMPORTED)
set_target_properties(GLESv2::GLESv2 PROPERTIES
IMPORTED_LOCATION "${GLESv2_LIBRARY}"
INTERFACE_INCLUDE_DIRECTORIES "${GLESv2_INCLUDE_DIR}")
if(EMSCRIPTEN)
add_library(GLESv2::GLESv2 INTERFACE IMPORTED)
else()
add_library(GLESv2::GLESv2 UNKNOWN IMPORTED)
set_target_properties(GLESv2::GLESv2 PROPERTIES
IMPORTED_LOCATION "${GLESv2_LIBRARY}"
INTERFACE_INCLUDE_DIRECTORIES "${GLESv2_INCLUDE_DIR}")
endif()
endif()