Disable gcc-4.8.x + binutils-2.25 + MIPS combination

This combination causes a compilation failure of the host-gcc-final
recipe like this one:

/br/output/host/usr/mips-buildroot-linux-gnu/bin/ld:
.libs/gload.o: relocation R_MIPS_HI16 against `__gnu_local_gp' can not
be used when making a shared object; recompile with -fPIC

The problem is the file 'libatomic/gload.c' is compiled without -fPIC
when using binutils-2.25. All gcc (with libatomic) versions below 4.9.3
are affected by this issue.

Here is a summary of affected/unaffected versions in Buildroot:

4.7.x: unaffected (doesn't have libatomic)
4.8.x: affected
4.9.x: unaffected (we have 4.9.3 which is fixed)
5.1.x: unaffected

The fix can be found here:

  https://github.com/gcc-mirror/gcc/commit/57f5c0954f95cb37f995d60167ddde06c7d6e697

However, given the following reasons...

- Upstream gcc 4.8 branch is closed.
- The fix is very hard to backport from 4.9 to 4.8.
- This stuff is insanely sensitive and not working at all could be
  better than looking like it works but not quite.

...I think the best choice is to disable that combination in Buildroot.

Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

diff --git a/package/gcc/Config.in.host b/package/gcc/Config.in.host
index 1fc0b8373df9d62f8dd1d3ed73082317005103be..4501b322e2db590fa4d5dc9df66d2db31ff5d653 100644 (file)
--- a/package/gcc/Config.in.host
+++ b/package/gcc/Config.in.host
@@ -60,6 +60,8 @@ choice
                depends on !BR2_cortex_a12
                # Broken or unsupported PPC cores
                depends on !BR2_powerpc_power8
+               # gcc-4.8.x + binutils-2.25 is broken for MIPS
+               depends on !((BR2_mips || BR2_mipsel || BR2_mips64 || BR2_mips64el) && BR2_BINUTILS_VERSION_2_25)
                select BR2_GCC_NEEDS_MPC
                select BR2_GCC_SUPPORTS_GRAPHITE