Merge pull request #191 from matthieucoquet/cmake_export

Export of CMake config-file package during install

Author: rpavlik

changes/sdk/pr.191.gh.OpenXR-SDK-Source.md

@@ -0,0 +1,4 @@
+---
+- issue.185.gh.OpenXR-SDK-Source
+---
+cmake: export OpenXRConfig.cmake during install. Two targets can be imported by another CMake application: OpenXR::openxr_loader and OpenXR::headers. 

src/CMakeLists.txt

@@ -156,6 +156,8 @@ endif()
 if(BUILD_WITH_WAYLAND_HEADERS)
     target_compile_definitions(openxr-all-supported INTERFACE XR_USE_PLATFORM_WAYLAND)
 endif()
+# openxr-all-supported is a dependency of openxr_loader so it should be added to the export set
+install(TARGETS openxr-all-supported EXPORT openxr_loader_export)
 
 # Find glslc shader compiler.
 # On Android, the NDK includes the binary, so no external dependency.

src/loader/CMakeLists.txt

@@ -239,8 +239,46 @@ if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_C_COMPILER_ID MATCHES "Clang")
 endif()
 
 install(
-    TARGETS openxr_loader
+    TARGETS openxr_loader EXPORT openxr_loader_export
     LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
     ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
     RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
 )
+
+export(
+    EXPORT openxr_loader_export
+    FILE ${CMAKE_CURRENT_BINARY_DIR}/OpenXRTargets.cmake
+    NAMESPACE OpenXR::
+)
+
+if((CMAKE_SYSTEM_NAME STREQUAL "Windows") OR (CMAKE_SYSTEM_NAME STREQUAL "WindowsStore"))
+    set(TARGET_DESTINATION cmake)
+elseif(CMAKE_SYSTEM_NAME STREQUAL "Linux")
+    set(TARGET_DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/openxr/)
+endif()
+
+install(
+    EXPORT openxr_loader_export
+    FILE OpenXRTargets.cmake
+    NAMESPACE OpenXR::
+    DESTINATION ${TARGET_DESTINATION}
+)
+
+include(CMakePackageConfigHelpers)
+set(INCLUDE_INSTALL_DIR include/)
+configure_package_config_file(
+    OpenXRConfig.cmake.in
+    ${CMAKE_CURRENT_BINARY_DIR}/OpenXRConfig.cmake
+    INSTALL_DESTINATION ${TARGET_DESTINATION}
+    PATH_VARS INCLUDE_INSTALL_DIR
+)
+write_basic_package_version_file(
+    ${CMAKE_CURRENT_BINARY_DIR}/OpenXRConfigVersion.cmake
+    VERSION "${MAJOR}.${MINOR}.${PATCH}"
+    COMPATIBILITY SameMajorVersion
+)
+install(
+    FILES ${CMAKE_CURRENT_BINARY_DIR}/OpenXRConfig.cmake
+          ${CMAKE_CURRENT_BINARY_DIR}/OpenXRConfigVersion.cmake
+    DESTINATION ${TARGET_DESTINATION}
+)

src/loader/OpenXRConfig.cmake.in

@@ -0,0 +1,12 @@
+
+@PACKAGE_INIT@
+
+# The header openxr.h is not added to the export target so we add the include directory here
+include("${CMAKE_CURRENT_LIST_DIR}/OpenXRTargets.cmake")
+set_and_check(OpenXR_INCLUDE_DIR "@PACKAGE_INCLUDE_INSTALL_DIR@")
+target_include_directories(OpenXR::openxr_loader INTERFACE ${OpenXR_INCLUDE_DIR})
+
+add_library(OpenXR::headers INTERFACE IMPORTED)
+target_include_directories(OpenXR::headers SYSTEM INTERFACE ${OpenXR_INCLUDE_DIR})
+
+check_required_components(OpenXR)