cf33d64528
Avoids a linking error when the library is not found as find_library sets GLESv2_LIBRARY to GLESv2-NOTFOUND Change-Id: I7ddc15483276e0be0c78b67b760c4d9188758270 Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io> Reviewed-by: Cristian Adam <cristian.adam@qt.io>
82 lines
2.8 KiB
CMake
82 lines
2.8 KiB
CMake
include(CheckCXXSourceCompiles)
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# No library linkage is necessary to use GLESv2 with Emscripten. The headers are also
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# system headers, so we don't need to search for them.
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if(EMSCRIPTEN)
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set(HAVE_GLESv2 ON)
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else()
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find_library(GLESv2_LIBRARY NAMES GLESv2 OpenGLES)
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find_path(GLESv2_INCLUDE_DIR NAMES "GLES2/gl2.h" "OpenGLES/ES2/gl.h" DOC "The OpenGLES 2 include path")
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find_package(EGL)
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set(_libraries "${CMAKE_REQUIRED_LIBRARIES}")
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if(GLESv2_LIBRARY)
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list(APPEND CMAKE_REQUIRED_LIBRARIES "${GLESv2_LIBRARY}")
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endif ()
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if(EGL_LIBRARY)
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list(APPEND CMAKE_REQUIRED_LIBRARIES "${EGL_LIBRARY}")
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endif()
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set(_includes "${CMAKE_REQUIRED_INCLUDES}")
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list(APPEND CMAKE_REQUIRED_INCLUDES "${GLESv2_INCLUDE_DIR}")
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check_cxx_source_compiles("
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#ifdef __APPLE__
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# include <OpenGLES/ES2/gl.h>
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#else
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# define GL_GLEXT_PROTOTYPES
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# include <GLES2/gl2.h>
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#endif
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int main(int argc, char *argv[]) {
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glUniform1f(1, GLfloat(1.0));
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glClear(GL_COLOR_BUFFER_BIT);
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}" HAVE_GLESv2)
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set(CMAKE_REQUIRED_LIBRARY "${_libraries}")
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unset(_libraries)
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set(CMAKE_REQUIRED_INCLUDES "${_includes}")
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unset(_includes)
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set(package_args GLESv2_INCLUDE_DIR GLESv2_LIBRARY HAVE_GLESv2)
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endif()
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# Framework handling partially inspired by FindGLUT.cmake.
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if(GLESv2_LIBRARY MATCHES "/([^/]+)\\.framework$")
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# TODO: Might need to handle non .tbd suffixes, but didn't find an
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# example like that.
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# TODO: Might need to handle INTERFACE_INCLUDE_DIRECTORIES differently.
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set(_library_imported_location "${GLESv2_LIBRARY}/${CMAKE_MATCH_1}.tbd")
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if(NOT EXISTS "${_library_imported_location}")
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set(_library_imported_location "")
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endif()
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else()
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set(_library_imported_location "${GLESv2_LIBRARY}")
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endif()
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set(GLESv2_LIBRARY "${_library_imported_location}")
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list(APPEND package_args HAVE_GLESv2)
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include(FindPackageHandleStandardArgs)
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find_package_handle_standard_args(GLESv2 DEFAULT_MSG ${package_args})
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mark_as_advanced(${package_args})
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if(GLESv2_FOUND AND NOT TARGET GLESv2::GLESv2)
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if(EMSCRIPTEN OR UIKIT)
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add_library(GLESv2::GLESv2 INTERFACE IMPORTED)
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if(UIKIT)
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# For simulator_and_device builds we can't specify the full library path, because
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# it's specific to either the device or the simulator. Resort to passing a link
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# flag instead.
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target_link_libraries(GLESv2::GLESv2 INTERFACE "-framework OpenGLES")
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endif()
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else()
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add_library(GLESv2::GLESv2 UNKNOWN IMPORTED)
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set_target_properties(GLESv2::GLESv2 PROPERTIES
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IMPORTED_LOCATION "${GLESv2_LIBRARY}"
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INTERFACE_INCLUDE_DIRECTORIES "${GLESv2_INCLUDE_DIR}")
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if(EGL_LIBRARY)
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target_link_libraries(GLESv2::GLESv2 INTERFACE "${EGL_LIBRARY}")
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endif()
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endif()
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endif()
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