On 02/26/2012 01:29 PM, ольга крыжановская wrote:
Glenn, I use a newer gcc version: gcc (SUSE Linux) 4.5.0 20100604
[gcc-4_5-branch revision 160292].
Can any one in the list confirm the warning with gcc>= 4.5?
We use -fno-strict-aliasing for ksh compilation. I've turned it off and
got this:
src/lib/libast/vmalloc/vmbest.c:202:5: warning: dereferencing
type-punned pointer will break strict-aliasing rules
src/lib/libast/vmalloc/vmbest.c:440:4: warning: dereferencing
type-punned pointer will break strict-aliasing rules
src/lib/libast/vmalloc/vmbest.c:571:3: warning: dereferencing
type-punned pointer will break strict-aliasing rules
src/lib/libast/vmalloc/vmbest.c:682:3: warning: dereferencing
type-punned pointer will break strict-aliasing rules
src/lib/libast/vmalloc/vmbest.c:693:5: warning: dereferencing
type-punned pointer will break strict-aliasing rules
src/lib/libast/vmalloc/vmbest.c:694:5: warning: dereferencing
type-punned pointer will break strict-aliasing rules
src/lib/libast/vmalloc/vmopen.c:145:2: warning: dereferencing
type-punned pointer will break strict-aliasing rules
src/lib/libast/vmalloc/vmopen.c:150:2: warning: dereferencing
type-punned pointer will break strict-aliasing rules
src/lib/libast/vmalloc/vmopen.c:151:2: warning: dereferencing
type-punned pointer will break strict-aliasing rules
src/lib/libast/vmalloc/vmprivate.c:169:2: warning: dereferencing
type-punned pointer will break strict-aliasing rules
src/lib/libast/vmalloc/vmstat.c:100:7: warning: dereferencing
type-punned pointer will break strict-aliasing rules
src/lib/libast/vmalloc/vmstat.c:102:7: warning: dereferencing
type-punned pointer will break strict-aliasing rules
src/lib/libsum/sum-sha2.c:743:2: warning: dereferencing type-punned
pointer will break strict-aliasing rules
src/lib/libsum/sum-sha2.c:1104:2: warning: dereferencing type-punned
pointer will break strict-aliasing rules
src/lib/libsum/sum-sha2.c:1105:2: warning: dereferencing type-punned
pointer will break strict-aliasing rules
src/cmd/ksh93/edit/emacs.c:1077:7: warning: dereferencing type-punned
pointer will break strict-aliasing rules
src/cmd/ksh93/edit/emacs.c:1079:7: warning: dereferencing type-punned
pointer will break strict-aliasing rules
Olga
On Sun, Feb 26, 2012 at 7:02 AM, Glenn Fowler<[email protected]> wrote:
I don;t see this with
gcc version 4.3.4 [gcc-4_3-branch revision 152973] (SUSE Linux)
On Wed, 15 Feb 2012 23:32:38 +0100 =?KOI8-R?B?z8zYx8Egy9LZ1sHOz9fTy8HR?= wrote:
Glenn, in libast's vmalloc I get this warning if I compile libast on
Suse Linux with gcc4 and CCFLAGS='-O3 -flto -fstrict-aliasing
-Wstrict-aliasing': src/lib/libast/vmalloc/vmstat.c:100:7: warning:
dereferencing type-punned pointer will break strict-aliasing rules
This appears to be the only aliasing related warning.
Olga
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