On Wed, 12 Aug 2015, Luca Barbato wrote:
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?
It actually produces a file though, I guess it only contains the bitcode
but not any actual code (which failed to assemble).
// Martin
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