Compile SkForceLinking on CMake

cmake/CMakeLists.txt

 # Boilerplate.
 cmake_minimum_required (VERSION 3.1)   # First version with CMAKE_CXX_STANDARD.
 project (skimake)
 set (CMAKE_CXX_STANDARD 11)
 
 # Default to Release mode.  We're mainly targeting Skia users, not Skia developers.
 if (NOT CMAKE_BUILD_TYPE)
     set (CMAKE_BUILD_TYPE Release)
 endif ()
 
@@ skipping 25 matching lines @@
 list (APPEND private_includes ../third_party/etc1          ../third_party/ktx)
 
 function (remove_srcs)
     file (GLOB_RECURSE to_remove ${ARGN})
     list (REMOVE_ITEM srcs ${to_remove})
     set (srcs ${srcs} PARENT_SCOPE)
 endfunction()
 
 # This file is empty and is only used to trick GYP.
 remove_srcs (../src/core/SkForceCPlusPlusLinking.cpp)
-# This file forces linking for all our supported image decoders.  We're more fine-grained.
-remove_srcs (../src/images/SkForceLinking.cpp)
 # Chrome only?
 remove_srcs (../src/ports/SkFontHost_fontconfig.cpp
              ../src/fonts/SkFontMgr_fontconfig.cpp
              ../src/ports/SkFontConfigInterface_direct.cpp
              ../src/ports/SkFontConfigInterface_direct_factory.cpp
              ../src/ports/SkFontConfigInterface_direct_google3.cpp
              ../src/ports/SkFontConfigInterface_direct_google3_factory.cpp)
 # Alternative font managers.
 remove_srcs (../src/ports/SkFontMgr_custom*.cpp)
 
@@ skipping 101 matching lines @@
 if (EXPAT_FOUND)
     list (APPEND private_includes ${EXPAT_INCLUDE_DIRS})
     list (APPEND libs             ${EXPAT_LIBRARIES})
 else()
     remove_srcs (../src/ports/SkFontMgr_android_parser.cpp)
 endif()
 
 if (GIF_FOUND)
     list (APPEND private_includes ${GIF_INCLUDE_DIRS})
     list (APPEND libs             ${GIF_LIBRARIES})
-    add_definitions(-DSK_CODEC_DECODES_GIF)
+    add_definitions(-DSK_HAS_GIF_LIBRARY)
 else()
     remove_srcs(../src/images/*GIF*)
     remove_srcs(../src/codec/*Gif*)
 endif()
 
 if (JPEG_FOUND)
     list (APPEND private_includes ${JPEG_INCLUDE_DIRS})
     list (APPEND libs             ${JPEG_LIBRARIES})
-    add_definitions(-DSK_CODEC_DECODES_JPEG)
+    add_definitions(-DSK_HAS_JPEG_LIBRARY)
 else()
     remove_srcs(../src/images/*JPEG*)
     remove_srcs(../src/codec/*Jpeg*)
 endif()
 
 if (LUA_FOUND)
     list (APPEND private_includes ${LUA_INCLUDE_DIR})
     list (APPEND libs             ${LUA_LIBRARIES})
 else()
     remove_srcs(../src/utils/*Lua*)
 endif()
 
 if (PNG_FOUND)
     list (APPEND private_includes ${PNG_INCLUDE_DIRS})
     list (APPEND libs             ${PNG_LIBRARIES})
     add_definitions(-DPNG_SKIP_SETJMP_CHECK)
     add_definitions(-DPNG_SKIP_SKIA_OPTS)
-    add_definitions(-DSK_CODEC_DECODES_PNG)
+    add_definitions(-DSK_HAS_PNG_LIBRARY)
 else()
     remove_srcs(../src/images/*PNG*)
     remove_srcs(../src/codec/*Png*)
     remove_srcs(../src/codec/*Ico*)
 endif()
 
 if (ZLIB_FOUND)
     list (APPEND private_includes ${ZLIB_INCLUDE_DIRS})
     list (APPEND libs             ${ZLIB_LIBRARIES})
     remove_srcs(../src/pdf/SkDocument_PDF_None.cpp)
 else()
     remove_srcs(../src/pdf/*.cpp)
     set (srcs ${srcs} ../src/pdf/SkDocument_PDF_None.cpp)
 endif()
 
 if (WEBP_INCLUDE_DIRS AND WEBP_LIBRARIES)
     list (APPEND private_includes ${WEBP_INCLUDE_DIRS})
     list (APPEND libs             ${WEBP_LIBRARIES})
-    add_definitions(-DSK_CODEC_DECODES_WEBP)
+    add_definitions(-DSK_HAS_WEBP_LIBRARY)
 else()
     remove_srcs(../src/images/*WEBP*)
     remove_srcs(../src/codec/*Webp*)
 endif()
 
 if (FREETYPE_FOUND)
     list (APPEND private_includes ${FREETYPE_INCLUDE_DIRS})
     list (APPEND libs             ${FREETYPE_LIBRARIES})
 endif()
 
@@ skipping 105 matching lines @@
         file (APPEND ${skia_h_path} "#include \"${filename_component}\"\n")
       endif ()
     endforeach()
   endif()
 endforeach()
 file(APPEND ${skia_h_path} "\n#endif  // skia_DEFINED\n")
 
 # Now build a simple example app that uses Skia via libskia.so.
 add_executable(example example.cpp)
 target_link_libraries(example skia ${OPENGL_LIBRARIES})