https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65262
Bug ID: 65262
Summary: Link time optimization breaks use
__attribute__((section("..."))) in templates
Product: gcc
Version: 4.8.3
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: lto
Assignee: unassigned at gcc dot gnu.org
Reporter: goswin-v-b at web dot de
CC: goswin-v-b at web dot de
Created attachment 34911
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34911&action=edit
Simple testcase
I'm trying to put a template member functions of a class into a different
section. Without -flto this works but with -flto the function reverts to the
.text section.
g++ -O2 -W -Wall -fvisibility=hidden -fno-inline -Tlink.ld -c -o main.o main.cc
g++ -O2 -W -Wall -fvisibility=hidden -fno-inline -Tlink.ld -o main main.o
g++ -O2 -W -Wall -fvisibility=hidden -fno-inline -Tlink.ld -flto -c -o
main.lto.o main.cc
g++ -O2 -W -Wall -fvisibility=hidden -fno-inline -Tlink.ld -flto -o main.lto
main.lto.o
Without link time optimization:
0000000000000200 l d .text.foo 0000000000000000 .text.foo
0000000000000210 g F .text.foo 0000000000000006 .hidden
foo()
0000000000000200 w F .text.foo 0000000000000006 .hidden
int foobar<int>()
With link time optimization:
0000000000000820 l d .text.foo 0000000000000000 .text.foo
0000000000000100 l F .text 0000000000000006 int foobar<int>()
0000000000000820 l F .text.foo 0000000000000006 foo()
