[cfe-dev] Clang compiling needs help

[Michelle Gu (micgu) via cfe-dev]

Hi Simon,

Thank you for your feedback!

First, I delete '-fno-pic -mabicalls' options and rerun the compiling, the error result is same as before. I doubt if these options work or not.
Second, when I tried to link my lib with other projects, I can see compile option ' WITHOUT_WERROR=1' during compiling. I think that means it's not the problem of warnings became errors.

Do you have any other suggestion?

BR,
Michelle

-----Original Message-----
From: Simon Dardis [mailto:Simon.Dardis at imgtec.com] 
Sent: 2017年2月7日 22:04
To: Michelle Gu (micgu) <mgu at nds.com>; cfe-dev at lists.llvm.org
Cc: Alon Shaltiel (ashaltie) <ashaltie at cisco.com>
Subject: RE: Clang compiling needs help

The "warning: linking abicalls files with non-abicalls files" warning is almost certainly arising from a long standing LLVM bug where all files produced from the integrated assembler for MIPS were marked as being abicalls files. It's fixed on ToT.

In theory the produced binary should be fine, as the error is occurring from incorrect ELF header flags. The error from 'make' may be due to treating warnings as errors.

The CFLAGS you've specified appear to be inconsistent with your mips-elf target. "-fno-pic -mabicalls"
produces position dependant code that can call position independent code. This would be for environments such as Linux/BSDs/etc. mips-elf I expect is a bare-metal environment, so -mabicalls would not be used for that target.

Thanks,
Simon