[cfe-commits] [llvm-commits] (autoconf) Build ASan runtime for ARM/Android

Alex Rosenberg alexr at leftfield.org
Tue Oct 9 18:54:00 PDT 2012

What about the Android NDK requires special handling that isn't already done for a sysroot?

Sent from my iPad

On Oct 8, 2012, at 2:28 AM, Evgeniy Stepanov <eugeni.stepanov at gmail.com> wrote:

> I have re-read this discussion and no longer understand what we are
> disagreeing on. Are you opposed to the "--with-android-toolchain"
> option? What if we call it "--with-android-ndk" to avoid confusion
> with the similar-named option for the gcc toolchain?
> Also, in your last message about "make android" and a platform file,
> do you mean both in the compiler-rt build system (and not llvm build
> system)?
> On Wed, Oct 3, 2012 at 12:15 PM, Evgeniy Stepanov
> <eugeni.stepanov at gmail.com> wrote:
>> On Wed, Oct 3, 2012 at 4:57 AM, Eric Christopher <echristo at gmail.com> wrote:
>>> On Tue, Oct 2, 2012 at 4:00 AM, Evgeniy Stepanov
>>> <eugeni.stepanov at gmail.com> wrote:
>>>> Yes, my first statement was incorrect.
>>>> Still, these option don't help, because they (a) change the default
>>>> target triple and sysroot of the resulting compiler, which may be
>>>> undesirable, and (b) only let us build one flavour of compiler-rt
>>>> anyway (just a different one this time).
>>> Well, you can pass a sysroot by command line option, changing the
>>> target is a little
>>> different unless you've got something like the -arch support that
>>> darwin has. That said,
>>> how are you building it anyhow unless you've got a compiler that supports the
>>> target you're building for?
>>> I think I'd probably do this via a config and just have a platform
>>> file for how you want
>>> to do android builds. Then you can do something like "make android"
>>> and it'll figure out
>>> how to build it.
>> I think my patchset has got all those things.
>> We use clang from the build tree to build the runtime for android -
>> that's the compiler for the target system. But we also need binutils
>> (linker, at least) and a sysroot. That's what NDK is for.
>> Are you suggesting we manually call compiler-rt's make like 'make -C
>> projects/compiler-rt LLVM_ANDROID_TOOLCHAIN_DIR=/a/b/c/d' ? This is a
>> bad UX (the option is undiscoverable), and the user will need to copy
>> the resulting library into the appropriate clang directory by hand.
>> And we need to specify the path to the ndk anyway somewhere, at least
>> once.
>>> WDYT?
>>> -eric
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