Android: allow host OS to be passed to envsetup.

Android: allow host OS to be passed to envsetup.

For the WebView build we need to support building on Mac, after
generating the makefiles on Linux. Add an option to envsetup.sh to
override the detected host OS.

The Android build system handles the actual logic of knowing how to
build host binaries on mac, so this is the only change that's needed (to
get V8 to use the right value of host_os in gyp).

BUG=


Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=184449

[Torne, 2013-02-25 16:12:13]

Hi Yaron, a simple one ;)

[Yaron, 2013-02-25 16:32:43]

lgtm

So are you generating different makefiles, one for linux and one for mac? The
downstream part doesn't use envsetup, or does it?

Note, I'd actually prefer simple cl's that remove code from envsetup ;)

https://codereview.chromium.org/12317098/diff/1/build/android/envsetup_functi...
File build/android/envsetup_functions.sh (right):

https://codereview.chromium.org/12317098/diff/1/build/android/envsetup_functi...
build/android/envsetup_functions.sh:167: # --target-arch=  Specifices target CPU
architecture. Currently supported
add option here.

[Torne, 2013-02-25 16:43:24]

On 2013/02/25 16:32:43, Yaron wrote:
> lgtm
> 
> So are you generating different makefiles, one for linux and one for mac? The
> downstream part doesn't use envsetup, or does it?

Yes, we use envsetup downstream because we need all the gyp variables that are
still in the common_env_vars bit. If we finish folding all that logic into the
actual gyp files.. ;)

> Note, I'd actually prefer simple cl's that remove code from envsetup ;)

Yes, so would I. I'm looking into having gyp itself handle host/target arch/OS
detection/overriding, which would remove some of the logic from envsetup, but
this CL is a temporary change to get mac builds working until then.

>
https://codereview.chromium.org/12317098/diff/1/build/android/envsetup_functi...
> File build/android/envsetup_functions.sh (right):
> 
>
https://codereview.chromium.org/12317098/diff/1/build/android/envsetup_functi...
> build/android/envsetup_functions.sh:167: # --target-arch=  Specifices target
CPU
> architecture. Currently supported
> add option here.

Oh, yes, I'll add it :)

[commit-bot: I haz the power, 2013-02-25 16:50:13]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/torne@chromium.org/12317098/5001

[commit-bot: I haz the power, 2013-02-25 18:43:44]

Change committed as 184449