From 1ef52275d5f87bceab09b917797084937384a97f Mon Sep 17 00:00:00 2001
From: "jochen@chromium.org"
 <jochen@chromium.org@ce2b1a6d-e550-0410-aec6-3dcde31c8c00>
Date: Mon, 23 Jun 2014 08:19:54 +0000
Subject: [PATCH] Set host_arch to ia32 on machines with a 32bit userland but a
 64bit kernel.

I don't know if there are any v8 bots with that configuration, but it seems
like a good idea to have v8 be consistent with chromium and nacl here, so that
this works fine if such a bot is ever set up.

This is similar to https://codereview.chromium.org/342493002/ , but with a
detect_v8_host_arch.py script that handles the additional machine types that
standalone.gypi used to handle.

BUG=368384 possibly?
LOG=Y
R=jochen@chromium.org

Review URL: https://codereview.chromium.org/346643002

Patch from Nico Weber <thakis@chromium.org>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21909 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
---
 build/detect_v8_host_arch.py | 67 ++++++++++++++++++++++++++++++++++++++++++++
 build/standalone.gypi        |  8 +-----
 2 files changed, 68 insertions(+), 7 deletions(-)
 create mode 100644 build/detect_v8_host_arch.py

diff --git a/build/detect_v8_host_arch.py b/build/detect_v8_host_arch.py
new file mode 100644
index 0000000..f66383b
--- /dev/null
+++ b/build/detect_v8_host_arch.py
@@ -0,0 +1,67 @@
+#!/usr/bin/env python
+# Copyright 2014 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.
+
+"""Outputs host CPU architecture in format recognized by gyp."""
+
+import platform
+import re
+import sys
+
+
+def main():
+  print DoMain([])
+  return 0
+
+def DoMain(_):
+  """Hook to be called from gyp without starting a separate python
+  interpreter."""
+  host_arch = platform.machine()
+
+  # Convert machine type to format recognized by gyp.
+  if re.match(r'i.86', host_arch) or host_arch == 'i86pc':
+    host_arch = 'ia32'
+  elif host_arch in ['x86_64', 'amd64']:
+    host_arch = 'x64'
+  elif host_arch.startswith('arm'):
+    host_arch = 'arm'
+  elif host_arch == 'aarch64':
+    host_arch = 'arm64'
+  elif host_arch.startswith('mips'):
+    host_arch = 'mipsel'
+
+  # platform.machine is based on running kernel. It's possible to use 64-bit
+  # kernel with 32-bit userland, e.g. to give linker slightly more memory.
+  # Distinguish between different userland bitness by querying
+  # the python binary.
+  if host_arch == 'x64' and platform.architecture()[0] == '32bit':
+    host_arch = 'ia32'
+
+  return host_arch
+
+if __name__ == '__main__':
+  sys.exit(main())
diff --git a/build/standalone.gypi b/build/standalone.gypi
index 7670e5b..7952bdc 100644
--- a/build/standalone.gypi
+++ b/build/standalone.gypi
@@ -51,13 +51,7 @@
               # 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/;\
-                                       s/aarch64/arm64/;\
-                                       s/mips.*/mipsel/")',
+              'host_arch%': '<!pymod_do_main(detect_v8_host_arch)',
             }, {
               # OS!="linux" and OS!="freebsd" and OS!="openbsd" and
               # OS!="netbsd" and OS!="mac"
-- 
2.7.4