Hi again;
On 05/17/12 11:44, Dimitry Andric wrote:
On 2012-05-17 17:44, Pedro Giffuni wrote:> Hi;
I took a bunch of patches that were merged into the GCC 4.1 branch
(under GPLv2) and prepared a patch for merging them into our base
gcc. These are supposed to be bug fixes only.
You can get the patch here:
http://people.freebsd.org/~pfg/patches/patch-contrib-gcc
And, for those really interested, the log is here:
http://people.freebsd.org/~pfg/patches/gcc41-pr-log
It may be my imagination but the patch seems to be causing more
warnings than usual and it breaks the kernel here:
...
../../../cam/scsi/scsi_sa.c: In function 'samount':
../../../cam/scsi/scsi_sa.c:1887: warning: 'comp_supported' may be used
uninitialized in this function
../../../cam/scsi/scsi_sa.c:1888: warning: 'write_protect' may be used
uninitialized in this function
These warnings seem wrong, upon casual inspection of the code. In any
case, if you compile the same file with gcc 4.7, they don't appear. :)
Any idea which particular gcc fix is responsible for them?
As a workaround, we could set all those variable to some reasonable
value, but that feels like a cheap trick to me...
But I'd rather just not import the fix that causes those warnings.
Ugh...
It appears the patch was fine after all: the warnings were somehow
triggered by optimizations in my /etc/make.conf file.
I will test it further before committing.
Pedro.
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