GYP: Generate makefiles for all architectures on Linux

On Linux running gyp_v8 will generate makefiles for all architectures. On other platforms generate for ia32 only as that is what is currently supported.

The output (out) directory is still shared.

R=jkummerow@chromium.org

BUG=none
TEST=none

Review URL: http://codereview.chromium.org//7104083

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8246 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

build/README.txt

@@ -13,39 +13,32 @@ Note for the command lines below that Debug is the default configuration,
 so specifying that on the command lines is not required.
 
 
-To generate Makefiles and build 32-bit version on Linux:
---------------------------------------------------------
+To generate Makefiles on Linux:
+-------------------------------
 
-$ build/gyp_v8 -D target_arch=ia32
-$ make BUILDTYPE=Debug
-$ out/Debug/shell
-$ make BUILDTYPE=Release
-$ out/Release/shell
+$ build/gyp_v8
 
-To generate Makefiles and build 64-bit version on Linux:
---------------------------------------------------------
-
-$ build/gyp_v8 -D target_arch=x64
-$ make BUILDTYPE=Debug
-$ out/Debug/shell
-$ make BUILDTYPE=Release
-$ out/Release/shell
+This will build makefiles for ia32, x64 and the ARM simulator with names
+Makefile-ia32, Makefile-x64 and Makefile-armu respectively.
 
-To generate Makefiles and build for the arm simulator on Linux:
----------------------------------------------------------------
+To build and run for ia32 in debug and release version do:
 
-$ build/gyp_v8 -I build/armu.gypi
-$ make BUILDTYPE=Debug
+$ make -f Makefile-ia32
 $ out/Debug/shell
-$ make BUILDTYPE=Release
+$ make -f Makefile-ia32 BUILDTYPE=Release
 $ out/Release/shell
 
+Change the makefile to build and run for the other architectures.
+
 
 To generate Xcode project files on Mac OS:
 ------------------------------------------
 
-$ build/gyp_v8 -D target_arch=ia32
-$ xcodebuild -project build/all.xcodeproj -configuration Debug
+$ build/gyp_v8
+
+This will make an Xcode project for the ia32 architecture. To build and run do:
+
+$ xcodebuild -project build/all.xcodeproj
 $ samples/build/Debug/shell
 $ xcodebuild -project build/all.xcodeproj -configuration Release
 $ samples/build/Release/shell
@@ -66,8 +59,8 @@ repository. From the root of the V8 project do the following:
 
 > svn co http://src.chromium.org/svn/trunk/tools/third_party/python_26@70627 third_party/python_26
 
-Now generate Visual Studio solution and project files:
+Now generate Visual Studio solution and project files for the ia32 architecture:
 
-> third_party\python_26\python build/gyp_v8 -D target_arch=ia32
+> third_party\python_26\python build/gyp_v8
 
 Now open build\All.sln in Visual Studio.

build/gyp_v8

@@ -38,9 +38,13 @@ import sys
 script_dir = os.path.dirname(__file__)
 v8_root = os.path.normpath(os.path.join(script_dir, os.pardir))
 
+sys.path.insert(0, os.path.join(v8_root, 'tools'))
+import utils
+
 sys.path.insert(0, os.path.join(v8_root, 'build', 'gyp', 'pylib'))
 import gyp
 
+
 def apply_gyp_environment(file_path=None):
   """
   Reads in a *.gyp_env file and applies the valid keys to os.environ.
@@ -68,6 +72,7 @@ def apply_gyp_environment(file_path=None):
       else:
         os.environ[var] = val
 
+
 def additional_include_files(args=[]):
   """
   Returns a list of additional (.gypi) files to include, without
@@ -97,6 +102,14 @@ def additional_include_files(args=[]):
 
   return result
 
+
+def run_gyp(args):
+  rc = gyp.main(args)
+  if rc != 0:
+    print 'Error running GYP'
+    sys.exit(rc)
+
+
 if __name__ == '__main__':
   args = sys.argv[1:]
 
@@ -141,5 +154,20 @@ if __name__ == '__main__':
   print 'Updating projects from gyp files...'
   sys.stdout.flush()
 
-  # Off we go...
-  sys.exit(gyp.main(args))
+  # Generate for the architectures supported on the given platform.
+  gyp_args = list(args)
+  gyp_args.append('-Dtarget_arch=ia32')
+  if utils.GuessOS() == 'linux':
+    gyp_args.append('-S-ia32')
+  run_gyp(gyp_args)
+
+  if utils.GuessOS() == 'linux':
+    gyp_args = list(args)
+    gyp_args.append('-Dtarget_arch=x64')
+    gyp_args.append('-S-x64')
+    run_gyp(gyp_args)
+
+    gyp_args = list(args)
+    gyp_args.append('-I' + v8_root + '/build/armu.gypi')
+    gyp_args.append('-S-armu')
+    run_gyp(gyp_args)