# - Find GLM # Find the GLM header-only library # # GLM::GLM - Interface target created if GLM was found. # # GLM_FOUND - True if GLM was found. # # Original Author: # 2019, 2021 Ryan Pavlik # # Copyright 2019, 2021, Collabora, Ltd. # # SPDX-License-Identifier: BSL-1.0 set(GLM_ROOT_DIR "${GLM_ROOT_DIR}" CACHE PATH "Directory to search for GLM") option(GLM_ATTEMPT_CMAKE_MODULE "Should we attempt to use GLM's own CMake module for configuration?" ON) mark_as_advanced(GLM_ATTEMPT_CMAKE_MODULE) if(GLM_ATTEMPT_CMAKE_MODULE AND NOT glm_FOUND) # Look for a CMake config file find_package(glm QUIET NO_MODULE) endif() # Ask pkg-config for hints find_package(PkgConfig QUIET) if(PKG_CONFIG_FOUND) set(_old_prefix_path "${CMAKE_PREFIX_PATH}") # So pkg-config uses GLM_ROOT_DIR too. if(GLM_ROOT_DIR) list(APPEND CMAKE_PREFIX_PATH ${GLM_ROOT_DIR}) endif() if(GLM_FIND_VERSION) set(_GLM_FIND_VERSION_EXT ">=${GLM_FIND_VERSION}") else() unset(_GLM_FIND_VERSION_EXT) endif() pkg_check_modules(PC_GLM QUIET glm${_GLM_FIND_VERSION_EXT}) # Restore set(CMAKE_PREFIX_PATH "${_old_prefix_path}") # Use pkg-config's version if we have it. if(PC_GLM_FOUND AND PC_GLM_VERSION AND GLM_FIND_VERSION AND NOT GLM_VERSION) set(GLM_VERSION ${PC_GLM_VERSION}) endif() endif() find_path( GLM_INCLUDE_DIR NAMES glm/glm.hpp PATHS "${GLM_ROOT_DIR}" PATH_SUFFIXES include HINTS ${PC_GLM_INCLUDE_DIRS} ${GLM_INCLUDE_DIRS}) if(GLM_INCLUDE_DIR AND NOT GLM_VERSION) # Parse the header to get the version, if we can file(STRINGS "${GLM_INCLUDE_DIR}/glm/detail/setup.hpp" _glm_header_contents REGEX "GLM_VERSION_(MAJOR|MINOR|PATCH|REVISION)") foreach(_line IN LISTS _glm_header_contents) if("${_line}" MATCHES "GLM_VERSION_(MAJOR|MINOR|PATCH|REVISION)[^0-9]+([0-9]+)") set(VERSION_COMPONENT "${CMAKE_MATCH_1}") set(GLM_VERSION_${VERSION_COMPONENT} "${CMAKE_MATCH_2}") endif() endforeach() if(DEFINED GLM_VERSION_MAJOR) set(GLM_VERSION "${GLM_VERSION_MAJOR}") if(DEFINED GLM_VERSION_MINOR) string(APPEND GLM_VERSION . ${GLM_VERSION_MINOR}) if(DEFINED GLM_VERSION_PATCH) string(APPEND GLM_VERSION . ${GLM_VERSION_PATCH}) if(DEFINED GLM_VERSION_REVISION) string(APPEND GLM_VERSION . ${GLM_VERSION_REVISION}) endif() endif() endif() endif() endif() if(GLM_VERSION) set(_version_arg VERSION_VAR GLM_VERSION) else() unset(_version_arg) endif() include(FindPackageHandleStandardArgs) find_package_handle_standard_args(GLM REQUIRED_VARS GLM_INCLUDE_DIR ${_version_arg}) if(GLM_FOUND AND NOT TARGET GLM::GLM) if(TARGET glm::glm) add_library(GLM::GLM ALIAS glm::glm) else() add_library(GLM::GLM INTERFACE) set_target_properties(GLM::GLM PROPERTIES INTERFACE_INCLUDE_DIRECTORIES "${GLM_INCLUDE_DIR}") endif() endif() if(GLM_FOUND) mark_as_advanced(GLM_ROOT_DIR) endif() mark_as_advanced(GLM_INCLUDE_DIR) include(FeatureSummary) set_package_properties( GLM PROPERTIES URL "https://github.com/g-truc/glm" DESCRIPTION "A header-only C++ mathematics library for graphics software based on the OpenGL Shading Language (GLSL) specifications." )