http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60607
--- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Variation of the problem without -march=native:
markus@x4 tmp % cat foo.ii
markus@x4 tmp % cat bar.ii
typedef int __m128i __attribute__ ((__vector_size__ (16)));
__m128i a, b, c;
void dequant_scaling () { c = __builtin_ia32_pmulld128 (a, b); }
markus@x4 tmp % cat main.ii
void dequant_scaling();
int main ()
{
dequant_scaling();
}
markus@x4 tmp % g++ -flto -fPIC -march=amdfam10 -O2 -c foo.ii
markus@x4 tmp % g++ -flto -fPIC -march=amdfam10 -O2 -msse4.1 -c bar.ii
markus@x4 tmp % g++ -flto -march=native -O2 -shared foo.o bar.o
markus@x4 tmp % ar cr test.a foo.o bar.o
markus@x4 tmp % g++ -march=amdfam10 -O2 main.ii test.a
bar.ii: In function ‘dequant_scaling’:
bar.ii:3:61: error: ‘__builtin_ia32_pmulld128’ needs isa option -m32 -msse4.1
void dequant_scaling () { c = __builtin_ia32_pmulld128 (a, b); }
^
lto-wrapper: /usr/x86_64-pc-linux-gnu/gcc-bin/4.9.0/g++ returned 1 exit status
/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.0/../../../../x86_64-pc-linux-gnu/bin/ld:
fatal error: lto-wrapper failed
collect2: error: ld returned 1 exit status
