[hjl@gnu-6 pie-6]$ cat x.S .text .global _start _start: movl foo(%rip), %eax [hjl@gnu-6 pie-6]$ make gcc -B./ -c -o x.o x.S ./ld -o x -pie x.o x.o: In function `_start': (.text+0x2): undefined reference to `foo' ./ld: x.o: relocation R_X86_64_PC32 against undefined symbol `foo' can not be used when making a shared object; recompile with -fPIC ./ld: final link failed: Bad value make: *** [x] Error 1 [hjl@gnu-6 pie-6]$ Since foo is undefined, the second error message is confusing.
The master branch has been updated by H.J. Lu <hjl@sourceware.org>: https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=6333bc0dd6e92dd5a76ba0a6890e08db2a6f7a29 commit 6333bc0dd6e92dd5a76ba0a6890e08db2a6f7a29 Author: H.J. Lu <hjl.tools@gmail.com> Date: Thu Jan 15 11:06:33 2015 -0800 Don't complain about -fPIC for undefined symbol When building executable, undefined symbol is a fatal error. We don't complain about -fPIC if the symbol is undefined. bfd/ PR ld/17847 * elf64-x86-64.c (elf_x86_64_relocate_section): Don't complain about -fPIC if the symbol is undefined when building executable. ld/testsuite/ PR ld/17847 * ld-x86-64/pie1.d: New file. * ld-x86-64/pie1.s: Likwise. * ld-x86-64/x86-64.exp: Run pie1.
Fixed.