On 12/08/15 12:12, Martin Storsjö wrote:
> The current automatic detection might not always succeed.
>
> On Xcode 7 with -fembed-bitcode, the current detection fails.
> In this case, the detection is to try to compile and link a file
> containing '__asm__ (".eabi_attribute 28, 1");'
>
> With -fembed-bitcode, the assembler does print an error, but the
> compiler process still returns a successful error code:
>
> $ cat test.c
> __asm__ (".eabi_attribute 28, 1");
> int main(void) { return 0; }
> $ clang -arch armv7 -c test.c -fembed-bitcode -miphoneos-version-min=6.0
> <inline asm>:1:1: error: unknown directive
> .eabi_attribute 28, 1
> ^
> $ echo $?
> 0
>
> This issue was pointed out by James Howe <[email protected]>.
> ---
> James also suggested a patch that skips the float ABI detection
> when --disable-vfp has been set. This also would work, but that
> disables all the VFP instruction optimizations, which is
> a different thing than whether float arguments are passed in
> registers or not.
>
> Better ways of detecting the float ABI used by apple's clang
> are also welcomed.
checking that the command actually produced a file is an option?
I'm fine with the patch.
lu
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