Build Skia for a bare-bones embedded Linux system.

gyp/libpng.gyp

Index: gyp/libpng.gyp
diff --git a/gyp/libpng.gyp b/gyp/libpng.gyp
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+++ b/gyp/libpng.gyp
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+# Copyright 2014 Google Inc.
+#
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+{
+  'variables': {
+    'skia_warnings_as_errors': 0,
+  },
+  'targets': [
+    {
+      'target_name': 'libpng',
+      'conditions': [
+        ['skia_libpng_static', {
+          'type': 'static_library',
+          'include_dirs': [
+            '../third_party/externals/libpng',
+          ],
+          'dependencies': [
+            'libzlib.gyp:libzlib',
+          ],
+          'export_dependent_settings': [
+            'libzlib.gyp:libzlib',
+          ],
+          'direct_dependent_settings': {
+            'include_dirs': [
+              '../third_party/externals/libpng',
+            ],
+          },
+          'cflags': [
+            '-w',
+            '-fvisibility=hidden',
+          ],
+          'sources': [
+            '../third_party/externals/libpng/png.c',
+            '../third_party/externals/libpng/pngerror.c',
+            '../third_party/externals/libpng/pnggccrd.c',
+            '../third_party/externals/libpng/pngget.c',
+            '../third_party/externals/libpng/pngmem.c',
+            '../third_party/externals/libpng/pngpread.c',
+            '../third_party/externals/libpng/pngread.c',
+            '../third_party/externals/libpng/pngrio.c',
+            '../third_party/externals/libpng/pngrtran.c',
+            '../third_party/externals/libpng/pngrutil.c',
+            '../third_party/externals/libpng/pngset.c',
+            '../third_party/externals/libpng/pngtrans.c',
+            '../third_party/externals/libpng/pngvcrd.c',
+            '../third_party/externals/libpng/pngwio.c',
+            '../third_party/externals/libpng/pngwrite.c',
+            '../third_party/externals/libpng/pngwtran.c',
+            '../third_party/externals/libpng/pngwutil.c',
+          ],
+        }, {
+          'type': 'none',
+          'dependencies': [
+            'libzlib.gyp:libzlib',
+          ],
+          'export_dependent_settings': [
+            'libzlib.gyp:libzlib',
+          ],
+          'direct_dependent_settings': {
+            'link_settings': {
+              'libraries': [
+                '-lpng',
+              ],
+            },
+          },
+        }]
+      ],
+    }
+  ]
+}