Support CMake find_package (pytorch#69)

luncliff · web-flow · commit ba0f4a216de3 · 2022-03-25T18:12:46.000-07:00
* Support CMake 'find_package'

* export 2 target 'cpuinfo', 'clog'
* create cpuinfo-config.cmake template

* fix script include
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -214,7 +214,7 @@ IF(CMAKE_SYSTEM_NAME MATCHES "^(Windows|CYGWIN|MSYS)$")
   TARGET_COMPILE_DEFINITIONS(cpuinfo_internals PRIVATE _WIN32_WINNT=0x0601)
 ENDIF()
 SET_TARGET_PROPERTIES(cpuinfo PROPERTIES PUBLIC_HEADER include/cpuinfo.h)
-TARGET_INCLUDE_DIRECTORIES(cpuinfo BEFORE PUBLIC include)
+TARGET_INCLUDE_DIRECTORIES(cpuinfo BEFORE PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include> $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>)
 TARGET_INCLUDE_DIRECTORIES(cpuinfo BEFORE PRIVATE src)
 TARGET_INCLUDE_DIRECTORIES(cpuinfo_internals BEFORE PUBLIC include src)
 IF(CPUINFO_LOG_LEVEL STREQUAL "default")
@@ -264,11 +264,25 @@ ENDIF()
 TARGET_LINK_LIBRARIES(cpuinfo PRIVATE clog)
 TARGET_LINK_LIBRARIES(cpuinfo_internals PRIVATE clog)
 
+# support find_package(cpuinfo CONFIG)
+INCLUDE(CMakePackageConfigHelpers)
+GET_FILENAME_COMPONENT(CONFIG_FILE_PATH ${CMAKE_CURRENT_BINARY_DIR}/cpuinfo-config.cmake ABSOLUTE)
+CONFIGURE_PACKAGE_CONFIG_FILE(
+  cmake/cpuinfo-config.cmake.in ${CONFIG_FILE_PATH}
+  INSTALL_DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/${PROJECT_NAME})
+INSTALL(FILES ${CONFIG_FILE_PATH}
+  DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/${PROJECT_NAME}) # cpuinfo_DIR ${prefix}/share/cpuinfo
+
 INSTALL(TARGETS cpuinfo
+  EXPORT cpuinfo-targets
   LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
   ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
   PUBLIC_HEADER DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
 
+INSTALL(EXPORT cpuinfo-targets
+  NAMESPACE ${PROJECT_NAME}:: # IMPORTED cpuinfo::cpuinfo, cpuinfo::clog
+  DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/${PROJECT_NAME})
+
 # ---[ cpuinfo micro-benchmarks
 IF(CPUINFO_SUPPORTED_PLATFORM AND CPUINFO_BUILD_BENCHMARKS)
   # ---[ Build google benchmark
diff --git a/cmake/cpuinfo-config.cmake.in b/cmake/cpuinfo-config.cmake.in
@@ -0,0 +1,12 @@
+@PACKAGE_INIT@
+
+get_filename_component(_DIR "${CMAKE_CURRENT_LIST_FILE}" PATH)
+file(GLOB CONFIG_FILES "${_DIR}/cpuinfo-config-*.cmake")
+foreach(f ${CONFIG_FILES})
+  include(${f})
+endforeach()
+
+# ${_DIR}/cpuinfo-targets-*.cmake will be included here
+include("${_DIR}/cpuinfo-targets.cmake")
+
+check_required_components(@PROJECT_NAME@)
diff --git a/deps/clog/CMakeLists.txt b/deps/clog/CMakeLists.txt
@@ -57,7 +57,7 @@ SET_TARGET_PROPERTIES(clog PROPERTIES
   C_EXTENSIONS NO)
 CLOG_TARGET_RUNTIME_LIBRARY(clog)
 SET_TARGET_PROPERTIES(clog PROPERTIES PUBLIC_HEADER include/clog.h)
-TARGET_INCLUDE_DIRECTORIES(clog BEFORE PUBLIC include)
+TARGET_INCLUDE_DIRECTORIES(clog PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include> $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>)
 IF(CLOG_LOG_TO_STDIO)
   TARGET_COMPILE_DEFINITIONS(clog PRIVATE CLOG_LOG_TO_STDIO=1)
 ELSE()
@@ -68,6 +68,7 @@ IF(ANDROID AND NOT CLOG_LOG_TO_STDIO)
 ENDIF()
 
 INSTALL(TARGETS clog
+  EXPORT cpuinfo-targets
   LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}"
   ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}"
   PUBLIC_HEADER DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}")
