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|
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file LICENSE.rst or https://cmake.org/licensing for details.
#[=======================================================================[.rst:
FindGLEW
--------
Finds the OpenGL Extension Wrangler Library (GLEW).
GLEW is a cross-platform C/C++ library that helps manage OpenGL extensions by
providing efficient run-time mechanisms to query and load OpenGL functionality
beyond the core specification.
.. versionadded:: 3.7
Debug and Release library variants are found separately.
.. versionadded:: 3.15
If GLEW is built using its CMake-based build system, it provides a CMake
package configuration file (``GLEWConfig.cmake``). This module now takes that
into account and first attempts to find GLEW in *config mode*. If the
configuration file is not available, it falls back to *module mode* and
searches standard locations.
Imported Targets
^^^^^^^^^^^^^^^^
This module provides the following :ref:`Imported Targets`:
``GLEW::GLEW``
.. versionadded:: 3.1
The main imported target encapsulating the GLEW usage requirements, available
if GLEW is found. It maps usage requirements of either ``GLEW::glew`` or
``GLEW::glew_s`` target depending on their availability.
``GLEW::glew``
.. versionadded:: 3.15
Target encapsulating the usage requirements for a shared GLEW library. This
target is available if GLEW is found and static libraries aren't requested via
the ``GLEW_USE_STATIC_LIBS`` hint variable (see below).
``GLEW::glew_s``
.. versionadded:: 3.15
Target encapsulating the usage requirements for a static GLEW library. This
target is available if GLEW is found and the ``GLEW_USE_STATIC_LIBS`` hint
variable is set to boolean true.
Result Variables
^^^^^^^^^^^^^^^^
This module defines the following variables:
``GLEW_FOUND``
Boolean indicating whether GLEW is found.
``GLEW_VERSION``
.. versionadded:: 3.15
The version of GLEW found.
``GLEW_VERSION_MAJOR``
.. versionadded:: 3.15
The major version of GLEW found.
``GLEW_VERSION_MINOR``
.. versionadded:: 3.15
The minor version of GLEW found.
``GLEW_VERSION_MICRO``
.. versionadded:: 3.15
The micro version of GLEW found.
``GLEW_INCLUDE_DIRS``
Include directories needed to use GLEW library.
``GLEW_LIBRARIES``
Libraries needed to link against to use GLEW library (shared or static
depending on configuration).
``GLEW_SHARED_LIBRARIES``
.. versionadded:: 3.15
Libraries needed to link against to use shared GLEW library.
``GLEW_STATIC_LIBRARIES``
.. versionadded:: 3.15
Libraries needed to link against to use static GLEW library.
Hints
^^^^^
This module accepts the following variables before calling
``find_package(GLEW)`` to influence this module's behavior:
``GLEW_USE_STATIC_LIBS``
.. versionadded:: 3.15
Set to boolean true to find static GLEW library and create the
``GLEW::glew_s`` imported target for static linkage.
``GLEW_VERBOSE``
.. versionadded:: 3.15
Set to boolean true to output a detailed log of this module. Can be used, for
example, for debugging.
Examples
^^^^^^^^
Finding GLEW and linking it to a project target:
.. code-block:: cmake
find_package(GLEW)
target_link_libraries(project_target PRIVATE GLEW::GLEW)
Using the static GLEW library, if found:
.. code-block:: cmake
set(GLEW_USE_STATIC_LIBS TRUE)
find_package(GLEW)
target_link_libraries(project_target PRIVATE GLEW::GLEW)
#]=======================================================================]
include(FindPackageHandleStandardArgs)
include(${CMAKE_CURRENT_LIST_DIR}/SelectLibraryConfigurations.cmake)
find_package(GLEW CONFIG QUIET)
if(GLEW_FOUND)
find_package_handle_standard_args(GLEW DEFAULT_MSG GLEW_CONFIG)
get_target_property(GLEW_INCLUDE_DIRS GLEW::GLEW INTERFACE_INCLUDE_DIRECTORIES)
set(GLEW_INCLUDE_DIR ${GLEW_INCLUDE_DIRS})
get_target_property(_GLEW_DEFS GLEW::GLEW INTERFACE_COMPILE_DEFINITIONS)
if("${_GLEW_DEFS}" MATCHES "GLEW_STATIC")
get_target_property(GLEW_LIBRARY_DEBUG GLEW::GLEW IMPORTED_LOCATION_DEBUG)
get_target_property(GLEW_LIBRARY_RELEASE GLEW::GLEW IMPORTED_LOCATION_RELEASE)
else()
get_target_property(GLEW_LIBRARY_DEBUG GLEW::GLEW IMPORTED_IMPLIB_DEBUG)
get_target_property(GLEW_LIBRARY_RELEASE GLEW::GLEW IMPORTED_IMPLIB_RELEASE)
endif()
get_target_property(_GLEW_LINK_INTERFACE GLEW::GLEW IMPORTED_LINK_INTERFACE_LIBRARIES_RELEASE) # same for debug and release
list(APPEND GLEW_LIBRARIES ${_GLEW_LINK_INTERFACE})
list(APPEND GLEW_LIBRARY ${_GLEW_LINK_INTERFACE})
select_library_configurations(GLEW)
if("${_GLEW_DEFS}" MATCHES "GLEW_STATIC")
set(GLEW_STATIC_LIBRARIES ${GLEW_LIBRARIES})
else()
set(GLEW_SHARED_LIBRARIES ${GLEW_LIBRARIES})
endif()
unset(_GLEW_DEFS)
unset(_GLEW_LINK_INTERFACE)
unset(GLEW_LIBRARY)
unset(GLEW_LIBRARY_DEBUG)
unset(GLEW_LIBRARY_RELEASE)
return()
endif()
if(GLEW_VERBOSE)
message(STATUS "FindGLEW: did not find GLEW CMake config file. Searching for libraries.")
endif()
if(APPLE)
find_package(OpenGL QUIET)
if(OpenGL_FOUND)
if(GLEW_VERBOSE)
message(STATUS "FindGLEW: Found OpenGL Framework.")
message(STATUS "FindGLEW: OPENGL_LIBRARIES: ${OPENGL_LIBRARIES}")
endif()
else()
if(GLEW_VERBOSE)
message(STATUS "FindGLEW: could not find GLEW library.")
endif()
return()
endif()
endif()
function(__glew_set_find_library_suffix shared_or_static)
if((UNIX AND NOT APPLE) AND "${shared_or_static}" MATCHES "SHARED")
set(CMAKE_FIND_LIBRARY_SUFFIXES ".so" PARENT_SCOPE)
elseif((UNIX AND NOT APPLE) AND "${shared_or_static}" MATCHES "STATIC")
set(CMAKE_FIND_LIBRARY_SUFFIXES ".a" PARENT_SCOPE)
elseif(APPLE AND "${shared_or_static}" MATCHES "SHARED")
set(CMAKE_FIND_LIBRARY_SUFFIXES ".dylib;.so" PARENT_SCOPE)
elseif(APPLE AND "${shared_or_static}" MATCHES "STATIC")
set(CMAKE_FIND_LIBRARY_SUFFIXES ".a" PARENT_SCOPE)
elseif(WIN32 AND MINGW AND "${shared_or_static}" MATCHES "SHARED")
set(CMAKE_FIND_LIBRARY_SUFFIXES ".dll.a" PARENT_SCOPE)
elseif(WIN32 AND MINGW AND "${shared_or_static}" MATCHES "STATIC")
set(CMAKE_FIND_LIBRARY_SUFFIXES ".a" PARENT_SCOPE)
elseif(WIN32 AND "${shared_or_static}" MATCHES "SHARED")
set(CMAKE_FIND_LIBRARY_SUFFIXES ".lib" PARENT_SCOPE)
elseif(WIN32 AND "${shared_or_static}" MATCHES "STATIC")
set(CMAKE_FIND_LIBRARY_SUFFIXES ".lib;.dll.a" PARENT_SCOPE)
endif()
if(GLEW_VERBOSE)
message(STATUS "FindGLEW: CMAKE_FIND_LIBRARY_SUFFIXES for ${shared_or_static}: ${CMAKE_FIND_LIBRARY_SUFFIXES}")
endif()
endfunction()
if(GLEW_VERBOSE)
if(DEFINED GLEW_USE_STATIC_LIBS)
message(STATUS "FindGLEW: GLEW_USE_STATIC_LIBS: ${GLEW_USE_STATIC_LIBS}.")
else()
message(STATUS "FindGLEW: GLEW_USE_STATIC_LIBS is undefined. Treated as FALSE.")
endif()
endif()
find_path(GLEW_INCLUDE_DIR GL/glew.h)
mark_as_advanced(GLEW_INCLUDE_DIR)
set(GLEW_INCLUDE_DIRS ${GLEW_INCLUDE_DIR})
if(GLEW_VERBOSE)
message(STATUS "FindGLEW: GLEW_INCLUDE_DIR: ${GLEW_INCLUDE_DIR}")
message(STATUS "FindGLEW: GLEW_INCLUDE_DIRS: ${GLEW_INCLUDE_DIRS}")
endif()
if(CMAKE_SIZEOF_VOID_P EQUAL 8)
set(_arch "x64")
else()
set(_arch "Win32")
endif()
set(__GLEW_CURRENT_FIND_LIBRARY_SUFFIXES ${CMAKE_FIND_LIBRARY_SUFFIXES})
__glew_set_find_library_suffix(SHARED)
find_library(GLEW_SHARED_LIBRARY_RELEASE
NAMES GLEW glew glew32
NAMES_PER_DIR
PATH_SUFFIXES lib lib64 libx32 lib/Release/${_arch}
PATHS ENV GLEW_ROOT)
find_library(GLEW_SHARED_LIBRARY_DEBUG
NAMES GLEWd glewd glew32d
NAMES_PER_DIR
PATH_SUFFIXES lib lib64
PATHS ENV GLEW_ROOT)
__glew_set_find_library_suffix(STATIC)
find_library(GLEW_STATIC_LIBRARY_RELEASE
NAMES GLEW glew glew32s
NAMES_PER_DIR
PATH_SUFFIXES lib lib64 libx32 lib/Release/${_arch}
PATHS ENV GLEW_ROOT)
find_library(GLEW_STATIC_LIBRARY_DEBUG
NAMES GLEWds glewds glew32ds
NAMES_PER_DIR
PATH_SUFFIXES lib lib64
PATHS ENV GLEW_ROOT)
set(CMAKE_FIND_LIBRARY_SUFFIXES ${__GLEW_CURRENT_FIND_LIBRARY_SUFFIXES})
unset(__GLEW_CURRENT_FIND_LIBRARY_SUFFIXES)
select_library_configurations(GLEW_SHARED)
select_library_configurations(GLEW_STATIC)
if(NOT GLEW_USE_STATIC_LIBS)
set(GLEW_LIBRARIES ${GLEW_SHARED_LIBRARY})
else()
set(GLEW_LIBRARIES ${GLEW_STATIC_LIBRARY})
endif()
if(GLEW_VERBOSE)
message(STATUS "FindGLEW: GLEW_SHARED_LIBRARY_RELEASE: ${GLEW_SHARED_LIBRARY_RELEASE}")
message(STATUS "FindGLEW: GLEW_STATIC_LIBRARY_RELEASE: ${GLEW_STATIC_LIBRARY_RELEASE}")
message(STATUS "FindGLEW: GLEW_SHARED_LIBRARY_DEBUG: ${GLEW_SHARED_LIBRARY_DEBUG}")
message(STATUS "FindGLEW: GLEW_STATIC_LIBRARY_DEBUG: ${GLEW_STATIC_LIBRARY_DEBUG}")
message(STATUS "FindGLEW: GLEW_SHARED_LIBRARY: ${GLEW_SHARED_LIBRARY}")
message(STATUS "FindGLEW: GLEW_STATIC_LIBRARY: ${GLEW_STATIC_LIBRARY}")
message(STATUS "FindGLEW: GLEW_LIBRARIES: ${GLEW_LIBRARIES}")
endif()
# Read version from GL/glew.h file
if(EXISTS "${GLEW_INCLUDE_DIR}/GL/glew.h")
cmake_policy(PUSH)
cmake_policy(SET CMP0159 NEW) # file(STRINGS) with REGEX updates CMAKE_MATCH_<n>
file(STRINGS "${GLEW_INCLUDE_DIR}/GL/glew.h" _contents REGEX "^VERSION_.+ [0-9]+")
cmake_policy(POP)
if(_contents)
string(REGEX REPLACE ".*VERSION_MAJOR[ \t]+([0-9]+).*" "\\1" GLEW_VERSION_MAJOR "${_contents}")
string(REGEX REPLACE ".*VERSION_MINOR[ \t]+([0-9]+).*" "\\1" GLEW_VERSION_MINOR "${_contents}")
string(REGEX REPLACE ".*VERSION_MICRO[ \t]+([0-9]+).*" "\\1" GLEW_VERSION_MICRO "${_contents}")
set(GLEW_VERSION "${GLEW_VERSION_MAJOR}.${GLEW_VERSION_MINOR}.${GLEW_VERSION_MICRO}")
endif()
endif()
if(GLEW_VERBOSE)
message(STATUS "FindGLEW: GLEW_VERSION_MAJOR: ${GLEW_VERSION_MAJOR}")
message(STATUS "FindGLEW: GLEW_VERSION_MINOR: ${GLEW_VERSION_MINOR}")
message(STATUS "FindGLEW: GLEW_VERSION_MICRO: ${GLEW_VERSION_MICRO}")
message(STATUS "FindGLEW: GLEW_VERSION: ${GLEW_VERSION}")
endif()
find_package_handle_standard_args(GLEW
REQUIRED_VARS GLEW_INCLUDE_DIRS GLEW_LIBRARIES
VERSION_VAR GLEW_VERSION)
if(NOT GLEW_FOUND)
if(GLEW_VERBOSE)
message(STATUS "FindGLEW: could not find GLEW library.")
endif()
return()
endif()
if(NOT TARGET GLEW::glew AND NOT GLEW_USE_STATIC_LIBS)
if(GLEW_VERBOSE)
message(STATUS "FindGLEW: Creating GLEW::glew imported target.")
endif()
add_library(GLEW::glew UNKNOWN IMPORTED)
set_target_properties(GLEW::glew
PROPERTIES INTERFACE_INCLUDE_DIRECTORIES "${GLEW_INCLUDE_DIRS}")
if(APPLE)
set_target_properties(GLEW::glew
PROPERTIES INTERFACE_LINK_LIBRARIES OpenGL::GL)
endif()
if(GLEW_SHARED_LIBRARY_RELEASE)
set_property(TARGET GLEW::glew
APPEND
PROPERTY IMPORTED_CONFIGURATIONS RELEASE)
set_target_properties(GLEW::glew
PROPERTIES IMPORTED_LOCATION_RELEASE "${GLEW_SHARED_LIBRARY_RELEASE}")
endif()
if(GLEW_SHARED_LIBRARY_DEBUG)
set_property(TARGET GLEW::glew
APPEND
PROPERTY IMPORTED_CONFIGURATIONS DEBUG)
set_target_properties(GLEW::glew
PROPERTIES IMPORTED_LOCATION_DEBUG "${GLEW_SHARED_LIBRARY_DEBUG}")
endif()
elseif(NOT TARGET GLEW::glew_s AND GLEW_USE_STATIC_LIBS)
if(GLEW_VERBOSE)
message(STATUS "FindGLEW: Creating GLEW::glew_s imported target.")
endif()
add_library(GLEW::glew_s UNKNOWN IMPORTED)
set_target_properties(GLEW::glew_s
PROPERTIES INTERFACE_INCLUDE_DIRECTORIES "${GLEW_INCLUDE_DIRS}")
if(APPLE)
set_target_properties(GLEW::glew_s
PROPERTIES INTERFACE_LINK_LIBRARIES OpenGL::GL)
endif()
if(GLEW_STATIC_LIBRARY_RELEASE)
set_property(TARGET GLEW::glew_s
APPEND
PROPERTY IMPORTED_CONFIGURATIONS RELEASE)
set_target_properties(GLEW::glew_s
PROPERTIES IMPORTED_LOCATION_RELEASE "${GLEW_STATIC_LIBRARY_RELEASE}")
endif()
if(GLEW_STATIC_LIBRARY_DEBUG)
set_property(TARGET GLEW::glew_s
APPEND
PROPERTY IMPORTED_CONFIGURATIONS DEBUG)
set_target_properties(GLEW::glew_s
PROPERTIES IMPORTED_LOCATION_DEBUG "${GLEW_STATIC_LIBRARY_DEBUG}")
endif()
endif()
if(NOT TARGET GLEW::GLEW)
if(GLEW_VERBOSE)
message(STATUS "FindGLEW: Creating GLEW::GLEW imported target.")
endif()
add_library(GLEW::GLEW UNKNOWN IMPORTED)
set_target_properties(GLEW::GLEW
PROPERTIES INTERFACE_INCLUDE_DIRECTORIES "${GLEW_INCLUDE_DIRS}")
if(APPLE)
set_target_properties(GLEW::GLEW
PROPERTIES INTERFACE_LINK_LIBRARIES OpenGL::GL)
endif()
if(TARGET GLEW::glew)
if(GLEW_SHARED_LIBRARY_RELEASE)
set_property(TARGET GLEW::GLEW
APPEND
PROPERTY IMPORTED_CONFIGURATIONS RELEASE)
set_target_properties(GLEW::GLEW
PROPERTIES IMPORTED_LOCATION_RELEASE "${GLEW_SHARED_LIBRARY_RELEASE}")
endif()
if(GLEW_SHARED_LIBRARY_DEBUG)
set_property(TARGET GLEW::GLEW
APPEND
PROPERTY IMPORTED_CONFIGURATIONS DEBUG)
set_target_properties(GLEW::GLEW
PROPERTIES IMPORTED_LOCATION_DEBUG "${GLEW_SHARED_LIBRARY_DEBUG}")
endif()
elseif(TARGET GLEW::glew_s)
if(GLEW_STATIC_LIBRARY_RELEASE)
set_property(TARGET GLEW::GLEW
APPEND
PROPERTY IMPORTED_CONFIGURATIONS RELEASE)
set_target_properties(GLEW::GLEW
PROPERTIES IMPORTED_LOCATION_RELEASE "${GLEW_STATIC_LIBRARY_RELEASE}")
endif()
if(GLEW_STATIC_LIBRARY_DEBUG AND GLEW_USE_STATIC_LIBS)
set_property(TARGET GLEW::GLEW
APPEND
PROPERTY IMPORTED_CONFIGURATIONS DEBUG)
set_target_properties(GLEW::GLEW
PROPERTIES IMPORTED_LOCATION_DEBUG "${GLEW_STATIC_LIBRARY_DEBUG}")
endif()
elseif(GLEW_VERBOSE)
message(WARNING "FindGLEW: no `GLEW::glew` or `GLEW::glew_s` target was created. Something went wrong in FindGLEW target creation.")
endif()
endif()
|
