https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64577
Bug ID: 64577
Summary: No -Wpadded warning on padding bitfields
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: chengniansun at gmail dot com
It seems that GCC does not emit -Wpadded warnings on the padding of bit-fields.
$: cat t.c
struct S1 {
unsigned f0 : 17;
unsigned f1 : 17;
};
int main(void) {
struct S1 s1;
return 0;
}
$:
$: gcc-trunk -Wpadded t.c
t.c:4:1: warning: padding struct size to alignment boundary [-Wpadded]
};
^
$:
$: clang-trunk -Wpadded t.c
t.c:3:14: warning: padding struct 'struct S1' with 15 bits to align 'f1'
[-Wpadded]
unsigned f1 : 17;
^
t.c:1:8: warning: padding size of 'struct S1' with 15 bits to alignment
boundary [-Wpadded]
struct S1 {
^
2 warnings generated.
$:
