https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78034
Bug ID: 78034
Summary: undefined reference during LTO linking.
Product: gcc
Version: 6.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: lto
Assignee: unassigned at gcc dot gnu.org
Reporter: pawel_sikora at zoho dot com
Target Milestone: ---
Created attachment 39834
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=39834&action=edit
testcase
% make
rm -f *.o *.a
g++ -m32 -Og -flto -fuse-ld=gold -g0 -march=pentium4 integer.cpp -c
gcc-ar -rv libinteger.a integer.o
/usr/bin/ar: creating libinteger.a
a - integer.o
g++ -m32 -Og -flto -fuse-ld=gold -g0 -march=pentium4 test.cpp -o test -L.
-linteger
/tmp/ccAeSuk8.ltrans0.ltrans.o:<artificial>:function SSE2_Multiply4(unsigned
int*, unsigned int const*, unsigned int const*): error: undefined reference to
'LMul2'
collect2: error: ld returned 1 exit status
the 'LMul2' is an assembly label generated by macro-hell.
without -flto it links fine.
