http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51088
Bug #: 51088
Summary: undefined symbol [local label] (optimization of
indirect goto)
Classification: Unclassified
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: etienne.berge...@octasic.com
This test case fail to compile with a error 'missing label'.
A label seem to be optimized and is missing at the end.
int test()
{
return ({ for ( void* L[] = {
(1?&&A:({goto *(*L?&&A:&&end); (void*)0;})),
((1||({B: goto *1[L]; 1;})),&&C),
({if (0) C: goto *&&end; &&B;}),
}; ({A: goto *L[2]; 1;}); ({end: return 42; 0;}))
goto *(0[L]); -1; });
}
* gcc (Debian 4.4.5-8) 4.4.5 (x86_64)
gcc -std=c99 -o blah blah.c
/tmp/ccWabCoL.o: In function `test':
blah.c:(.text+0x5): undefined reference to `.L2'
collect2: ld returned 1 exit status
* gcc (Debian 4.6.1-4) 4.6.1 (x86_64)
gcc -o blah blah.c -std=c99
/tmp/ccOX241S.o:blah.c:function test: error: undefined reference to '.L4'
collect2: ld returned 1 exit status
