[llvm] r258627 - [Bitcode] Insert the darwin wrapper at the beginning of a file when the

[Rafael Espíndola via llvm-commits]

On 26 January 2016 at 09:10, Akira Hatanaka <ahatanaka at apple.com> wrote:
>
>> On Jan 26, 2016, at 9:06 AM, Rafael Espíndola <rafael.espindola at gmail.com> wrote:
>>
>> On 23 January 2016 at 08:02, Akira Hatanaka via llvm-commits
>> <llvm-commits at lists.llvm.org> wrote:
>>> Author: ahatanak
>>> Date: Sat Jan 23 10:02:10 2016
>>> New Revision: 258627
>>>
>>> URL: http://llvm.org/viewvc/llvm-project?rev=258627&view=rev
>>> Log:
>>> [Bitcode] Insert the darwin wrapper at the beginning of a file when the
>>> target is macho.
>>>
>>> It looks like the check for macho was accidentally dropped in r132959.
>>>
>>> I don't have a test case, but I'll add one if anyone knows how this can
>>> be tested.
>>
>>
>> llvm-as should do it, no?
>>
>> In a .ll with just
>>
>> target triple = "x86_64-apple-macosx"
>>
>> I get a .bc that starts with "de c0 17 0b" (bitcode in LE) and with
>>
>> target triple = "x86_64-pc-linux"
>>
>> I get a .bc that starts with "42 43 c0 de" (BC code).
>>
>
> Can I use hexdump to print the header? Or are there other llvm tools to do that?

It might be an issue on windows. I am not sure. You might be able to
use python or "head -c" to get the first bytes.

Cheers,
Rafael