Initial attempt to add support for using gyp to build V8 itself...

build/common.gypi

+# Copyright 2010 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+{
+  'variables': {
+    'library%': 'static_library',
+    'component%': 'static_library',
+    'visibility%': 'hidden',
+    'variables': {
+      'conditions': [
+        [ 'OS=="linux" or OS=="freebsd" or OS=="openbsd"', {
+          # This handles the Linux platforms we generally deal with. Anything
+          # else gets passed through, which probably won't work very well; such
+          # hosts should pass an explicit target_arch to gyp.
+          'host_arch%':
+            '<!(uname -m | sed -e "s/i.86/ia32/;s/x86_64/x64/;s/amd64/x64/;s/arm.*/arm/")',
+        }, {  # OS!="linux" and OS!="freebsd" and OS!="openbsd"
+          'host_arch%': 'ia32',
+        }],
+      ],
+    },
+    'host_arch%': '<(host_arch)',
+    'target_arch%': '<(host_arch)',
+    'v8_target_arch%': '<(target_arch)',
+  },
+  'target_defaults': {
+    'default_configuration': 'Debug',
+    'configurations': {
+      'Debug': {
+        'cflags': [ '-g', '-O0' ],
+        'defines': [ 'ENABLE_DISASSEMBLER', 'DEBUG' ],
+      },
+      'Release': {
+        'cflags': [ '-O3', '-fomit-frame-pointer', '-fdata-sections', '-ffunction-sections' ],
+      },
+    },
+  },
+  'conditions': [
+    [ 'OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="solaris"', {
+      'target_defaults': {
+        'cflags': [ '-Wall', '-pthread', '-fno-rtti', '-fno-exceptions'],
+        'ldflags': [ '-pthread', ],
+        'conditions': [
+          [ 'target_arch=="ia32"', {
+            'cflags': [ '-m32' ],
+            'ldflags': [ '-m32' ],
+          }],
+          [ 'OS=="linux"', {
+            'cflags': [ '-ansi' ],
+          }],
+          [ 'visibility=="hidden"', {
+            'cflags': [ '-fvisibility=hidden' ],
+          }],
+        ],
+      },
+    }],
+  ],
+}