https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65780
--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
Please provide the output of "readelf -sW a.o" to verify
if optopt is COMMON:
[hjl@gnu-6 gcc]$ ./xgcc -B./ -O2 -c /tmp/a.c
[hjl@gnu-6 gcc]$ readelf -sW a.o
Symbol table '.symtab' contains 12 entries:
Num: Value Size Type Bind Vis Ndx Name
0: 0000000000000000 0 NOTYPE LOCAL DEFAULT UND
1: 0000000000000000 0 FILE LOCAL DEFAULT ABS a.c
2: 0000000000000000 0 SECTION LOCAL DEFAULT 1
3: 0000000000000000 0 SECTION LOCAL DEFAULT 2
4: 0000000000000000 0 SECTION LOCAL DEFAULT 3
5: 0000000000000000 0 SECTION LOCAL DEFAULT 4
6: 0000000000000000 0 SECTION LOCAL DEFAULT 5
7: 0000000000000000 0 SECTION LOCAL DEFAULT 8
8: 0000000000000000 0 SECTION LOCAL DEFAULT 9
9: 0000000000000000 0 SECTION LOCAL DEFAULT 7
10: 0000000000000000 13 FUNC GLOBAL DEFAULT 5 main
11: 0000000000000004 4 OBJECT GLOBAL DEFAULT COM optopt
[hjl@gnu-6 gcc]$
