Build Skia for a bare-bones embedded Linux system.

gyp/images.gyp

 # GYP file for images project.
 {
   'targets': [
     {
       'target_name': 'images',
       'product_name': 'skia_images',
       'type': 'static_library',
       'standalone_static_library': 1,
       'dependencies': [
         'core.gyp:*',
         'libjpeg.gyp:*',
         'libwebp.gyp:libwebp',
         'utils.gyp:utils',
+        'libpng.gyp:libpng',
       ],
       'conditions': [
         [ 'skia_android_framework == 0', {
           'export_dependent_settings': [
             'libjpeg.gyp:*',
+           'libpng.gyp:libpng',

[scroggo, 2014/02/06 16:22:13]

nit: should line up with libjpeg.

[djsollen, 2014/02/06 16:24:34]

spacing

[hal.canary, 2014/02/06 18:01:57]

Done.

[hal.canary, 2014/02/06 18:01:57]

Done.

           ],
         }],
       ],
       'include_dirs': [
         '../include/images',
         '../src/lazy',
         # for access to SkErrorInternals.h
         '../src/core/',
         # for access to SkImagePriv.h
         '../src/image/',
@@ skipping 83 matching lines @@
             '../src/images/SkImageDecoder_libpng.cpp',
             '../src/images/SkImageDecoder_libgif.cpp',
             '../src/images/SkMovie_gif.cpp',
           ],
         },{ #else if skia_os != mac
           'sources!': [
             '../src/ports/SkImageDecoder_CG.cpp',
           ],
         }],
         [ 'skia_os in ["linux", "freebsd", "openbsd", "solaris"]', {
           # Any targets that depend on this target should link in libpng, libgif, and

[scroggo, 2014/02/06 16:22:13]

This comment is out of date.

[djsollen, 2014/02/06 16:24:34]

this comment is out of date and should be removed.

[hal.canary, 2014/02/06 18:01:57]

Done.

[hal.canary, 2014/02/06 18:01:57]

Done.

           # our code that calls it.
           # See http://code.google.com/p/gyp/wiki/InputFormatReference#Dependent_Settings
-          'link_settings': {
-            'libraries': [
-              '-lgif',
-              '-lpng',
-              '-lz',
-            ],
-          },
+          'dependencies': [
+            'giflib.gyp:giflib'

[scroggo, 2014/02/06 16:22:13]

It appears that without this change, the images project will have these
libraries as link_settings, but with it, giflib will have -lgif as a
link_setting, and images will depend on giflib. Does that accomplish the same
thing?

[hal.canary, 2014/02/06 18:01:57]

Exactly.  giflib.gyp uses direct_dependent_settings.

+          ]
           # end libpng/libgif stuff
         }],
         # FIXME: NaCl should be just like linux, etc, above, but it currently is separated out
         # to remove gif. Once gif is supported by naclports, this can be merged into the above
         # condition.
         [ 'skia_os == "nacl"', {
           'sources!': [
             '../src/images/SkImageDecoder_libgif.cpp',
             '../src/images/SkMovie_gif.cpp',
           ],
-          'link_settings': {
-            'libraries': [
-              '-lpng',
-              '-lz',
-            ],
-          },
         }],
         [ 'skia_os == "android"', {
           'include_dirs': [
              '../src/utils',
           ],
           'dependencies': [
              'android_deps.gyp:gif',
              'android_deps.gyp:png',
           ],
           'conditions': [
             [ 'skia_android_framework == 0', {
               'export_dependent_settings': [
                 'android_deps.gyp:png'
               ],
             }],
           ],
         },{ #else if skia_os != android
           'sources!': [
             '../src/images/SkImageRef_ashmem.h',
             '../src/images/SkImageRef_ashmem.cpp',
           ],
         }],
         [ 'skia_os == "chromeos"', {
           'dependencies': [
              'chromeos_deps.gyp:gif',
           ],
-          'link_settings': {
-            'libraries': [
-              '-lpng',
-            ],
-          },
         }],
         [ 'skia_os == "ios"', {
            'include_dirs': [
              '../include/utils/mac',
            ],
         }],
       ],
       'direct_dependent_settings': {
         'include_dirs': [
           '../include/images',
         ],
       },
     },
   ],
 }