https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62108
Bug ID: 62108
Summary: Resolution of mismatched __attribute__ ((__section__
(""))) changes between 4.9 and 4.10.
Product: gcc
Version: 4.10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ipa
Assignee: unassigned at gcc dot gnu.org
Reporter: jgreenhalgh at gcc dot gnu.org
In this testcase:
void func(void);
void __attribute__((__section__("bar")))
func (void)
{
}
There is a mismatch between the section attribute given to the prototype (none,
so ".text") and the definition ("bar") of func.
Compiling this testcase with a 4.9 and a 4.10 compiler using
gcc test.c -c
and dumping with
objdump -x
Gives different results between 4.9.1 (4.9.1 release) and 4.10.0 (20140803
(experimental)):
$ objdump -x 4.9.o | grep func
0000000000000000 g F bar 0000000000000006 func
$ objdump -x 4.10.o | grep func
0000000000000000 g F .text 0000000000000007 func
This trips up an ARM kernel build.
We should either error on the mismatch, provide a consistent behaviour, or
document the change if this is expected.
