llvm dev - Apr 2012 - [LLVMdev] Trouble with tweaking test-release.sh script

Hi Bill,

  The preliminary result of regression test on ARM shows quit a lot failures,
which makes me nervous. After discussion on IRC, echristo and chandlerc
sugguested
the following possibilities,

  1) some flag weirdness
  2) miscompile via cross toolchain
  3) architecture-specific fundamental bug

chandlerc told me compile LLVM/Clang without "-fno-strict-aliasing"
first, see
if those failures gone. If not, turn off all optimizations when building
LLVM/Clang. But I have trouble with tweaking test-release.sh so that it can
compile with "-fno-strict-aliasing" option. You can see the script I
modified
at [2]. Although I set CFLAGS and CXXFLAGS to "-fno-strict-aliasing",
I see
no "-fno-strict-aliasing" in llvm.make-Phase1-Release.log, seems
CFLAGS and
CXXFLAGS don't work. Do you know the correct way to enable/disable compiler
options?

  Thanks! :)

Regards,
chenwj

[1] http://people.cs.nctu.edu.tw/~chenwj/tmp/regression-test.txt
[2] http://people.cs.nctu.edu.tw/~chenwj/tmp/test-release.txt

-- 
Wei-Ren Chen (陳韋任)
Computer Systems Lab, Institute of Information Science,
Academia Sinica, Taiwan (R.O.C.)
Tel:886-2-2788-3799 #1667
Homepage: http://people.cs.nctu.edu.tw/~chenwj

I have a native compile and the result seems better... You can compare
the result of cross compile [1] and the native compile [2].

  Any though?

Regards,
chenwj

[1] http://people.cs.nctu.edu.tw/~chenwj/tmp/regression-test.txt
[2] http://people.cs.nctu.edu.tw/~chenwj/tmp/llvm.check-Phase1-Release.txt

-- 
Wei-Ren Chen (陳韋任)
Computer Systems Lab, Institute of Information Science,
Academia Sinica, Taiwan (R.O.C.)
Tel:886-2-2788-3799 #1667
Homepage: http://people.cs.nctu.edu.tw/~chenwj

Hi 陳韋任,

Sorry for the late response.

On Apr 21, 2012, at 8:03 PM, 陳韋任 wrote:
>  I have a native compile and the result seems better... You can compare
> the result of cross compile [1] and the native compile [2].
> 
>  Any though?
> 
I'm not particularly happy about the failures here. We need to get to the
bottom of them. In the previous email, you tried setting CFLAGS and CXXFLAGS to
-fno-strict-aliasing during configuration. Try setting them during the
'make' command:

	$ make ... CFLAGS=-fno-strict-aliasing CXXFLAGS=-fno-strict-aliasing

etc.

If you get failures with that, then try one of the test cases and see how
it's failing. If it's a crash, then see if you can figure out why
it's crashing. :-) You may have to compile and run things by hand to really
dig into this...

-bw