Use proper targets for CMake.

Also fix the bug where near lossless was not used
and allow examples to be built by default.

Change-Id: Ieb5ef77fafe83f3776ff4fd27a6d26534c7a51f3
(cherry picked from commit e155dda0cc)

CMakeLists.txt

@@ -1,16 +1,16 @@
-cmake_minimum_required(VERSION 2.8.7)
+cmake_minimum_required(VERSION 3.5)
 
-project(libwebp C)
+project(WebP C)
 
 # Options for coder / decoder executables.
 option(WEBP_ENABLE_SIMD "Enable any SIMD optimization." ON)
-option(WEBP_BUILD_CWEBP "Build the cwebp command line tool." OFF)
+option(WEBP_BUILD_CWEBP "Build the cwebp command line tool." ON)
-option(WEBP_BUILD_DWEBP "Build the dwebp command line tool." OFF)
+option(WEBP_BUILD_DWEBP "Build the dwebp command line tool." ON)
-option(WEBP_BUILD_GIF2WEBP "Build the gif2webp conversion tool." OFF)
+option(WEBP_BUILD_GIF2WEBP "Build the gif2webp conversion tool." ON)
-option(WEBP_BUILD_IMG2WEBP "Build the img2webp animation tool." OFF)
+option(WEBP_BUILD_IMG2WEBP "Build the img2webp animation tool." ON)
-option(WEBP_BUILD_WEBPINFO "Build the webpinfo command line tool." OFF)
+option(WEBP_BUILD_WEBPINFO "Build the webpinfo command line tool." ON)
 option(WEBP_BUILD_WEBP_JS "Emscripten build of webp.js." OFF)
-option(WEBP_ENABLE_NEAR_LOSSLESS "Enable near-lossless encoding" ON)
+option(WEBP_NEAR_LOSSLESS "Enable near-lossless encoding" ON)
 option(WEBP_ENABLE_SWAP_16BIT_CSP "Enable byte swap for 16 bit colorspaces." OFF)
 
 if(WEBP_BUILD_WEBP_JS)
@@ -22,12 +22,13 @@ set(WEBP_DEP_INCLUDE_DIRS)
 
 if(NOT CMAKE_BUILD_TYPE)
   set(CMAKE_BUILD_TYPE "Release" CACHE
-    "Build type: Release, Debug or RelWithDebInfo" STRING FORCE
+    "Build type: Release, Debug, MinSizeRel or RelWithDebInfo" STRING FORCE
   )
 endif()
 
 # Include dependencies.
 include(cmake/deps.cmake)
+include(GNUInstallDirs)
 
 ################################################################################
 # Options.
@@ -100,6 +101,11 @@ foreach(FILE ${WEBP_SIMD_FILES_NOT_TO_INCLUDE})
   list(REMOVE_ITEM WEBP_DSP_DEC_SRCS ${FILE})
 endforeach()
 
+# Generate the config.h file.
+configure_file(${CMAKE_CURRENT_LIST_DIR}/cmake/config.h.in
+  ${CMAKE_CURRENT_BINARY_DIR}/src/webp/config.h)
+add_definitions(-DHAVE_CONFIG_H)
+
 ### Define the mandatory libraries.
 # Build the webpdecoder library.
 if(MSVC)
@@ -108,24 +114,62 @@ if(MSVC)
 else()
   add_definitions(-Wall)
 endif()
-include_directories(${CMAKE_CURRENT_SOURCE_DIR} ${WEBP_DEP_INCLUDE_DIRS})
+include_directories(${WEBP_DEP_INCLUDE_DIRS})
 add_library(webpdecode OBJECT ${WEBP_DEC_SRCS})
+target_include_directories(webpdecode PRIVATE ${CMAKE_CURRENT_BINARY_DIR}
+                                              ${CMAKE_CURRENT_SOURCE_DIR}
+)
 add_library(webpdspdecode OBJECT ${WEBP_DSP_COMMON_SRCS} ${WEBP_DSP_DEC_SRCS})
+target_include_directories(webpdspdecode PRIVATE ${CMAKE_CURRENT_BINARY_DIR}
+                                                 ${CMAKE_CURRENT_SOURCE_DIR}
+)
 add_library(webputilsdecode OBJECT ${WEBP_UTILS_COMMON_SRCS}
-  ${WEBP_UTILS_DEC_SRCS})
+                                   ${WEBP_UTILS_DEC_SRCS}
+)
+target_include_directories(webputilsdecode PRIVATE ${CMAKE_CURRENT_BINARY_DIR}
+                                                   ${CMAKE_CURRENT_SOURCE_DIR}
+)
 add_library(webpdecoder $<TARGET_OBJECTS:webpdecode>
   $<TARGET_OBJECTS:webpdspdecode> $<TARGET_OBJECTS:webputilsdecode>)
 target_link_libraries(webpdecoder ${WEBP_DEP_LIBRARIES})
+target_include_directories(webpdecoder
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}
+          ${CMAKE_CURRENT_SOURCE_DIR}
+  INTERFACE $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+)
+set_target_properties(webpdecoder PROPERTIES PUBLIC_HEADER
+"${CMAKE_CURRENT_SOURCE_DIR}/src/webp/decode.h;\
+${CMAKE_CURRENT_SOURCE_DIR}/src/webp/types.h"
+)
 
 # Build the webp library.
 add_library(webpencode OBJECT ${WEBP_ENC_SRCS})
+target_include_directories(webpencode PRIVATE ${CMAKE_CURRENT_BINARY_DIR}
+                                              ${CMAKE_CURRENT_SOURCE_DIR}
+)
 add_library(webpdsp OBJECT ${WEBP_DSP_COMMON_SRCS} ${WEBP_DSP_DEC_SRCS}
   ${WEBP_DSP_ENC_SRCS})
+target_include_directories(webpdsp PRIVATE ${CMAKE_CURRENT_BINARY_DIR}
+                                           ${CMAKE_CURRENT_SOURCE_DIR}
+)
 add_library(webputils OBJECT ${WEBP_UTILS_COMMON_SRCS} ${WEBP_UTILS_DEC_SRCS}
   ${WEBP_UTILS_ENC_SRCS})
+target_include_directories(webputils PRIVATE ${CMAKE_CURRENT_BINARY_DIR}
+                                             ${CMAKE_CURRENT_SOURCE_DIR}
+)
 add_library(webp $<TARGET_OBJECTS:webpdecode> $<TARGET_OBJECTS:webpdsp>
   $<TARGET_OBJECTS:webpencode> $<TARGET_OBJECTS:webputils>)
 target_link_libraries(webp ${WEBP_DEP_LIBRARIES})
+target_include_directories(webp
+                           PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
+                                   ${CMAKE_CURRENT_BINARY_DIR}
+                           PUBLIC $<INSTALL_INTERFACE:include>
+)
+set_target_properties(webp PROPERTIES PUBLIC_HEADER
+"${CMAKE_CURRENT_SOURCE_DIR}/src/webp/decode.h;\
+${CMAKE_CURRENT_SOURCE_DIR}/src/webp/encode.h;\
+${CMAKE_CURRENT_SOURCE_DIR}/src/webp/types.h"
+)
 
 # Make sure the OBJECT libraries are built with position independent code
 # (it is not ON by default).
@@ -135,6 +179,17 @@ set_target_properties(webpdecode webpdspdecode webputilsdecode
 # Build the webp demux library.
 add_library(webpdemux ${WEBP_DEMUX_SRCS})
 target_link_libraries(webpdemux webp)
+target_include_directories(webpdemux
+                           PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
+                                   ${CMAKE_CURRENT_BINARY_DIR}
+                           PUBLIC $<INSTALL_INTERFACE:include>
+)
+set_target_properties(webpdemux PROPERTIES PUBLIC_HEADER
+"${CMAKE_CURRENT_SOURCE_DIR}/src/webp/decode.h;\
+${CMAKE_CURRENT_SOURCE_DIR}/src/webp/demux.h;\
+${CMAKE_CURRENT_SOURCE_DIR}/src/webp/mux_types.h;\
+${CMAKE_CURRENT_SOURCE_DIR}/src/webp/types.h"
+)
 
 # Set the version numbers.
 function(parse_version FILE NAME VAR)
@@ -182,6 +237,8 @@ if(WEBP_BUILD_CWEBP OR WEBP_BUILD_DWEBP OR
   list(APPEND EXAMPLEUTIL_SRCS
     ${CMAKE_CURRENT_SOURCE_DIR}/examples/stopwatch.h)
   add_library(exampleutil ${EXAMPLEUTIL_SRCS})
+  target_include_directories(exampleutil
+    PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/src>)
 
   parse_Makefile_am(${CMAKE_CURRENT_SOURCE_DIR}/imageio "IMAGEIOUTILS_SRCS"
     "imageio_util_[^ ]*")
@@ -213,9 +270,9 @@ if(WEBP_BUILD_DWEBP)
     "dwebp")
   add_executable(dwebp ${DWEBP_SRCS})
   target_link_libraries(dwebp exampleutil imagedec imageenc webpdecoder)
-  install(TARGETS dwebp RUNTIME DESTINATION bin)
+  install(TARGETS dwebp RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
   set_property(TARGET dwebp PROPERTY INCLUDE_DIRECTORIES
-    ${CMAKE_CURRENT_SOURCE_DIR}/src ${CMAKE_CURRENT_BINARY_DIR}/src)
+    ${CMAKE_CURRENT_BINARY_DIR}/src)
 endif()
 
 if(WEBP_BUILD_CWEBP)
@@ -225,9 +282,9 @@ if(WEBP_BUILD_CWEBP)
     "cwebp")
   add_executable(cwebp ${CWEBP_SRCS})
   target_link_libraries(cwebp exampleutil imagedec webp)
-  install(TARGETS cwebp RUNTIME DESTINATION bin)
+  install(TARGETS cwebp RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
   set_property(TARGET cwebp PROPERTY INCLUDE_DIRECTORIES
-    ${CMAKE_CURRENT_SOURCE_DIR}/src ${CMAKE_CURRENT_BINARY_DIR}/src)
+    ${CMAKE_CURRENT_BINARY_DIR}/src)
 endif()
 
 if(WEBP_BUILD_GIF2WEBP AND NOT GIF_FOUND)
@@ -239,9 +296,17 @@ if(WEBP_BUILD_GIF2WEBP OR WEBP_BUILD_IMG2WEBP)
     "")
   add_library(webpmux ${WEBP_MUX_SRCS})
   target_link_libraries(webpmux webp)
+  target_include_directories(webpmux
+                             PRIVATE ${CMAKE_CURRENT_BINARY_DIR}
+                             ${CMAKE_CURRENT_SOURCE_DIR})
   parse_version(mux/Makefile.am webpmux WEBP_MUX_SOVERSION)
   set_target_properties(webpmux PROPERTIES VERSION ${PACKAGE_VERSION}
     SOVERSION ${WEBP_MUX_SOVERSION})
+  set_target_properties(webpmux PROPERTIES PUBLIC_HEADER
+"${CMAKE_CURRENT_SOURCE_DIR}/src/webp/mux.h;\
+${CMAKE_CURRENT_SOURCE_DIR}/src/webp/mux_types.h;\
+${CMAKE_CURRENT_SOURCE_DIR}/src/webp/types.h;"
+  )
   list(APPEND INSTALLED_LIBRARIES webpmux)
 endif()
 
@@ -253,9 +318,9 @@ if(WEBP_BUILD_GIF2WEBP)
   add_executable(gif2webp ${GIF2WEBP_SRCS})
   target_link_libraries(gif2webp exampleutil imageioutil webp webpmux
     ${WEBP_DEP_GIF_LIBRARIES})
-  install(TARGETS gif2webp RUNTIME DESTINATION bin)
+  install(TARGETS gif2webp RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
   set_property(TARGET gif2webp PROPERTY INCLUDE_DIRECTORIES
-    ${CMAKE_CURRENT_SOURCE_DIR}/src ${CMAKE_CURRENT_BINARY_DIR}/src)
+    ${CMAKE_CURRENT_BINARY_DIR}/src)
 endif()
 
 if(WEBP_BUILD_IMG2WEBP)
@@ -265,9 +330,9 @@ if(WEBP_BUILD_IMG2WEBP)
     "img2webp")
   add_executable(img2webp ${IMG2WEBP_SRCS})
   target_link_libraries(img2webp exampleutil imagedec imageioutil webp webpmux)
-  install(TARGETS img2webp RUNTIME DESTINATION bin)
+  install(TARGETS img2webp RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
   set_property(TARGET img2webp PROPERTY INCLUDE_DIRECTORIES
-    ${CMAKE_CURRENT_SOURCE_DIR}/src ${CMAKE_CURRENT_BINARY_DIR}/src)
+    ${CMAKE_CURRENT_BINARY_DIR}/src)
 endif()
 
 if (WEBP_BUILD_WEBPINFO)
@@ -277,7 +342,7 @@ if (WEBP_BUILD_WEBPINFO)
     "webpinfo")
   add_executable(webpinfo ${WEBPINFO_SRCS})
   target_link_libraries(webpinfo exampleutil imageioutil)
-  install(TARGETS webpinfo RUNTIME DESTINATION bin)
+  install(TARGETS webpinfo RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
   set_property(TARGET webpinfo PROPERTY INCLUDE_DIRECTORIES
     ${CMAKE_CURRENT_SOURCE_DIR}/src ${CMAKE_CURRENT_BINARY_DIR}/src)
 endif()
@@ -307,25 +372,22 @@ if(WEBP_BUILD_WEBP_JS)
   target_compile_definitions(webpdecoder PUBLIC EMSCRIPTEN)
 endif()
 
-# Generate the config.h file.
-configure_file(${CMAKE_CURRENT_LIST_DIR}/cmake/config.h.in
-  ${CMAKE_CURRENT_BINARY_DIR}/src/webp/config.h)
-add_definitions(-DHAVE_CONFIG_H)
-# The webp folder is included as we reference config.h as
-# ../webp/config.h or webp/config.h
-include_directories(${CMAKE_CURRENT_BINARY_DIR})
-
 # Install the different headers and libraries.
-install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/src/webp/decode.h
+include(GNUInstallDirs)
-              ${CMAKE_CURRENT_SOURCE_DIR}/src/webp/demux.h
+install(
-              ${CMAKE_CURRENT_SOURCE_DIR}/src/webp/encode.h
+  TARGETS ${INSTALLED_LIBRARIES}
-              ${CMAKE_CURRENT_SOURCE_DIR}/src/webp/mux.h
+  EXPORT ${PROJECT_NAME}Targets
-              ${CMAKE_CURRENT_SOURCE_DIR}/src/webp/mux_types.h
+  PUBLIC_HEADER DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/webp
-              ${CMAKE_CURRENT_SOURCE_DIR}/src/webp/types.h
+  INCLUDES DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
-        DESTINATION include/webp)
+  ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
-install(TARGETS ${INSTALLED_LIBRARIES}
+  LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
-        LIBRARY DESTINATION lib
+  RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
-        ARCHIVE DESTINATION lib)
+)
+set(ConfigPackageLocation ${CMAKE_INSTALL_DATADIR}/${PROJECT_NAME}/cmake/)
+install(EXPORT ${PROJECT_NAME}Targets
+        NAMESPACE ${PROJECT_NAME}::
+        DESTINATION ${ConfigPackageLocation}
+)
 
 # Create the CMake version file.
 include(CMakePackageConfigHelpers)
@@ -337,7 +399,6 @@ write_basic_package_version_file(
 
 # Create the Config file.
 include(CMakePackageConfigHelpers)
-set(ConfigPackageLocation share/WebP/cmake/)
 configure_package_config_file(
   ${CMAKE_CURRENT_SOURCE_DIR}/cmake/WebPConfig.cmake.in
   ${CMAKE_CURRENT_BINARY_DIR}/WebPConfig.cmake
@@ -364,7 +425,7 @@ foreach(I_MAN RANGE ${MAN_PAGES_RANGE})
   if(WEBP_BUILD_${EXEC_BUILD})
     list(GET MAN_PAGES ${I_MAN} MAN_PAGE)
     install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/man/${MAN_PAGE}
-      DESTINATION ${CMAKE_INSTALL_PREFIX}/share/man/man1
+      DESTINATION ${CMAKE_INSTALL_MANDIR}/man1
       COMPONENT doc
     )
   endif()