https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66784
Bug ID: 66784
Summary: no symbol emitted for builtin with lto
Product: gcc
Version: lto
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: guido.hatzsis at yandex dot com
Target Milestone: ---
No symbols are emitted when compiling a built-in with -flto.
eg:
# cat << __EOF > bar.i
_Complex float __mulsc3(float x, float y, float z, float a) { return -1.0; }
__EOF
# rm bar.o ; gcc -c bar.i ; gcc-nm bar.o
0000000000000000 T __mulsc3
# rm bar.o ; gcc -flto -c bar.i ; gcc-nm bar.o
/usr/lib/gcc/x86_64-pc-linux-gnu/5.1.0/../../../../x86_64-pc-linux-gnu/bin/nm:
bar.o: no symbols
# cat << __EOF > bar.i
void __mulsc3(float x, float y, float z, float a) { }
__EOF
# rm bar.o ; gcc -flto -c bar.i ; gcc-nm bar.o
bar.i:1:6: warning: conflicting types for built-in function ‘__mulsc3’
void __mulsc3(float x, float y, float z, float a) { }
^
00000000 T __mulsc3
