Refactor Skia's GYP to separate Chrome additions from the core lib.

skia/skia_library_opts.gyp

+# Copyright 2013 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+
+# This gyp file contains the platform-specific optimizations for Skia
+{
+  'targets': [
+    # Due to an unfortunate intersection of lameness between gcc and gyp,
+    # we have to build the *_SSE2.cpp files in a separate target.  The
+    # gcc lameness is that, in order to compile SSE2 intrinsics code, it
+    # must be passed the -msse2 flag.  However, with this flag, it may
+    # emit SSE2 instructions even for scalar code, such as the CPUID
+    # test used to test for the presence of SSE2.  So that, and all other
+    # code must be compiled *without* -msse2.  The gyp lameness is that it
+    # does not allow file-specific CFLAGS, so we must create this extra
+    # target for those files to be compiled with -msse2.
+    #
+    # This is actually only a problem on 32-bit Linux (all Intel Macs have
+    # SSE2, Linux x86_64 has SSE2 by definition, and MSC will happily emit
+    # SSE2 from instrinsics, which generating plain ol' 386 for everything
+    # else).  However, to keep the .gyp file simple and avoid platform-specific
+    # build breakage, we do this on all platforms.
+
+    # For about the same reason, we need to compile the ARM opts files
+    # separately as well.
+    {
+      'target_name': 'skia_opts',
+      'type': 'static_library',
+      'include_dirs': [
+        'config',
+        '../third_party/skia/include/config',
+        '../third_party/skia/include/core',
+        '../third_party/skia/src/core',
+        '../third_party/skia/src/opts',
+      ],
+      'conditions': [
+        [ 'os_posix == 1 and OS != "mac" and OS != "android" and \
+           target_arch != "arm" and target_arch != "mipsel"', {
+          'cflags': [
+            '-msse2',
+          ],
+        }],
+        [ 'target_arch != "arm" and target_arch != "mipsel"', {
+          'sources': [
+            '../third_party/skia/src/opts/SkBitmapProcState_opts_SSE2.cpp',
+            '../third_party/skia/src/opts/SkBlitRect_opts_SSE2.cpp',
+            '../third_party/skia/src/opts/SkBlitRow_opts_SSE2.cpp',
+            '../third_party/skia/src/opts/SkUtils_opts_SSE2.cpp',
+            '../third_party/skia/src/opts/SkBitmapFilter_opts_SSE2.cpp',
+          ],
+          'conditions': [
+            # x86 Android doesn't support SSSE3 instructions.
+            [ 'OS != "android"', {
+              'dependencies': [
+                'skia_opts_ssse3',
+              ],
+            }],
+          ],
+        }],
+        [ 'target_arch == "arm"', {
+          'conditions': [
+            [ 'arm_version >= 7 and arm_neon == 1', {
+              'defines': [
+                '__ARM_HAVE_NEON',
+              ],
+            }],
+            [ 'arm_version >= 7 and arm_neon_optional == 1', {
+              'defines': [
+                '__ARM_HAVE_OPTIONAL_NEON_SUPPORT',
+              ],
+            }],
+            [ 'arm_version >= 7 and (arm_neon == 1 or arm_neon_optional == 1)', {
+              'cflags': [
+                # The neon assembly contains conditional instructions which
+                # aren't enclosed in an IT block. The assembler complains
+                # without this option.
+                # See #86592.
+                '-Wa,-mimplicit-it=always',
+              ],
+              'dependencies': [
+                'skia_opts_neon',
+              ]
+           }],
+          ],
+          # The assembly uses the frame pointer register (r7 in Thumb/r11 in
+          # ARM), the compiler doesn't like that. Explicitly remove the
+          # -fno-omit-frame-pointer flag for Android, as that gets added to all
+          # targets via common.gypi.
+          'cflags!': [
+            '-fno-omit-frame-pointer',
+            '-marm',
+            '-mapcs-frame',
+          ],
+          'cflags': [
+            '-fomit-frame-pointer',
+          ],
+          'sources': [
+            '../third_party/skia/src/opts/SkBitmapProcState_opts_arm.cpp',
+          ],
+        }],
+        [ 'target_arch == "arm" and (arm_version < 7 or (arm_neon == 0 and arm_neon_optional == 1))', {
+          'sources': [
+            '../third_party/skia/src/opts/memset.arm.S',
+          ],
+        }],
+        [ 'target_arch == "arm" and arm_version < 6', {
+          'sources': [
+            '../third_party/skia/src/opts/SkBlitRow_opts_none.cpp',
+            '../third_party/skia/src/opts/SkUtils_opts_none.cpp',
+          ],
+        }],
+        [ 'target_arch == "arm" and arm_version >= 6', {
+          'sources': [
+            '../third_party/skia/src/opts/SkBlitRow_opts_arm.cpp',
+            '../third_party/skia/src/opts/SkBlitRow_opts_arm.h',
+            '../third_party/skia/src/opts/opts_check_arm.cpp',
+          ],
+        }],
+        [ 'target_arch == "mipsel"',{
+          'cflags': [
+            '-fomit-frame-pointer',
+          ],
+          'sources': [
+            '../third_party/skia/src/opts/SkBitmapProcState_opts_none.cpp',
+            '../third_party/skia/src/opts/SkBlitRow_opts_none.cpp',
+            '../third_party/skia/src/opts/SkUtils_opts_none.cpp',
+          ],
+        }],
+      ],
+    },
+    # For the same lame reasons as what is done for skia_opts, we have to
+    # create another target specifically for SSSE3 code as we would not want
+    # to compile the SSE2 code with -mssse3 which would potentially allow
+    # gcc to generate SSSE3 code.
+    {
+      'target_name': 'skia_opts_ssse3',
+      'type': 'static_library',
+      'include_dirs': [
+        '..',
+        'config',
+        '../third_party/skia/include/config',
+        '../third_party/skia/include/core',
+        '../third_party/skia/src/core',
+      ],
+      'conditions': [
+        [ 'OS in ["linux", "freebsd", "openbsd", "solaris"]', {
+          'cflags': [
+            '-mssse3',
+          ],
+        }],
+        [ 'OS == "mac"', {
+          'xcode_settings': {
+            'GCC_ENABLE_SUPPLEMENTAL_SSE3_INSTRUCTIONS': 'YES',
+          },
+        }],
+        [ 'OS == "win"', {
+          'include_dirs': [
+            'config/win',
+          ],
+          'direct_dependent_settings': {
+            'include_dirs': [
+              'config/win',
+            ],
+          },
+        }],
+        [ 'target_arch != "arm" and target_arch != "mipsel"', {
+          'sources': [
+            '../third_party/skia/src/opts/SkBitmapProcState_opts_SSSE3.cpp',
+          ],
+        }],
+      ],
+    },
+    {
+      'target_name': 'skia_opts_none',
+      'type': 'static_library',
+      'include_dirs': [
+        '..',
+        'config',
+        '../third_party/skia/include/config',
+        '../third_party/skia/include/core',
+        '../third_party/skia/src/core',
+      ],
+      'sources': [
+        '../third_party/skia/src/opts/SkBitmapProcState_opts_none.cpp',
+        '../third_party/skia/src/opts/SkBlitRow_opts_none.cpp',
+        '../third_party/skia/src/opts/SkUtils_opts_none.cpp',
+      ],
+    },
+  ],
+  'conditions': [
+    # NEON code must be compiled with -mfpu=neon which also affects scalar
+    # code. To support dynamic NEON code paths, we need to build all
+    # NEON-specific sources in a separate static library. The situation
+    # is very similar to the SSSE3 one.
+    ['target_arch == "arm" and (arm_neon == 1 or arm_neon_optional == 1)', {
+      'targets': [
+        {
+          'target_name': 'skia_opts_neon',
+          'type': 'static_library',
+          'include_dirs': [
+            '..',
+            'config',
+            '../third_party/skia/include/core',
+            '../third_party/skia/src/core',
+            '../third_party/skia/src/opts',
+          ],
+          'cflags!': [
+            '-fno-omit-frame-pointer',
+            '-mfpu=vfp',  # remove them all, just in case.
+            '-mfpu=vfpv3',
+            '-mfpu=vfpv3-d16',
+          ],
+          'cflags': [
+            '-mfpu=neon',
+            '-fomit-frame-pointer',
+          ],
+          'ldflags': [
+            '-march=armv7-a',
+            '-Wl,--fix-cortex-a8',
+          ],
+          'sources': [
+            '../third_party/skia/src/opts/memset16_neon.S',
+            '../third_party/skia/src/opts/memset32_neon.S',
+            '../third_party/skia/src/opts/SkBitmapProcState_arm_neon.cpp',
+            '../third_party/skia/src/opts/SkBitmapProcState_matrixProcs_neon.cpp',
+            '../third_party/skia/src/opts/SkBitmapProcState_matrix_clamp_neon.h',
+            '../third_party/skia/src/opts/SkBitmapProcState_matrix_repeat_neon.h',
+            '../third_party/skia/src/opts/SkBlitRow_opts_arm_neon.cpp',
+          ],
+          'conditions': [
+            ['arm_neon == 1', {
+              'defines': [
+                '__ARM_HAVE_NEON',
+              ],
+            }],
+            ['arm_neon_optional == 1', {
+              'defines': [
+                '__ARM_HAVE_OPTIONAL_NEON_SUPPORT',
+              ],
+            }],
+          ],
+        },
+      ],
+    }],
+  ],
+}