Re: Forcing -fno-strict-aliasing to all compiles breaks compiles with xlc/xlc_r

[Bojan Smojver <bo...@rexursive.com>]

On Fri, 2008-02-29 at 12:54 -0500, Chris Dukes wrote:

> xlc_r -qcpluscmt

Yeah, we should only use -fno-strict-aliasing with GCC.

-- 
Bojan

Re: Forcing -fno-strict-aliasing to all compiles breaks compiles with xlc/xlc_r

[Bojan Smojver <bo...@rexursive.com>]

On Fri, 2008-03-07 at 12:22 -0700, Chris Dukes wrote:

> Your test is including the '-c', allowing it to pass. 

OK. After I sent the patch, I realised that you toolchain only had a
problem with the whole thing during the link phase. Sorry :-(

Can you try replacing AC_COMPILE_IFELSE in my patch with AC_LINK_IFELSE?
I just want to see if the test will produce the correct result. If it
does, I think the whole thing should be reworked to use both tests and
only if both pass use -fno-strict-aliasing.

-- 
Bojan

Re: Forcing -fno-strict-aliasing to all compiles breaks compiles with xlc/xlc_r

[Chris Dukes <cd...@us.ibm.com>]

No joy.

xlc -fno-strict-aliasing -c -o conftest.o confest.c
will work
Follow that with
xlc -fno-strict-aliasing -c -o conftest conftest.o
and it'll error with 
ld: 0706-005 Cannot find or open file: no-strict-aliasing
        ld:fopen(): A file or directory in the path name does not exist.
This is because '-f' supposed to be passed to 'ld' by xlc on AIX.

Your test is including the '-c', allowing it to pass.

I think the root problem is being introduced with placing $CFLAGS in the 
link invocation of libtool.
Unfortunately, this solution would lead to other problems if someone is 
also making use of '-qipa' in optimization (Not that it makes much sense 
for this package).

Thanks,
Chris Dukes




Bojan Smojver <bo...@rexursive.com> 
03/02/2008 05:32 PM

To
Chris Dukes/Durham/Contr/IBM@IBMUS
cc
apreq-dev@httpd.apache.org
Subject
Re: Forcing -fno-strict-aliasing to all compiles breaks compiles with 
xlc/xlc_r






On Mon, 2008-03-03 at 09:03 +1100, Bojan Smojver wrote:

> Yeah, we should only use -fno-strict-aliasing with GCC.

Can you let me know if this helps? You'll need to run buildconf, of
course...

-- 
Bojan

Re: Forcing -fno-strict-aliasing to all compiles breaks compiles with xlc/xlc_r

[Bojan Smojver <bo...@rexursive.com>]

On Mon, 2008-03-03 at 09:03 +1100, Bojan Smojver wrote:

> Yeah, we should only use -fno-strict-aliasing with GCC.

Can you let me know if this helps? You'll need to run buildconf, of
course...

-- 
Bojan