(failed "stderr nonempty" "stderr:\nprog.o: In function `zxcfoo2_foo':\n(.text+0x520): undefined reference to `zxc4foo3_foo'\nprog.o: In function `zxc4foo5_foo':\n(.text+0xad0): undefined reference to `zxc4foo6_foo'\nprog.o: In function `go':\n(.text+0x18): undefined reference to `fakemain_foo'\ncollect2: ld returned 1 exit status\n\n\nstdout:\n\n\n")