kumquat-buildroot/arch
Yann E. MORIN e4b1fa69cd arch/arm: VFP and Thumb1 are not compatible
gcc will refuse to build with both --with-mode=thumb and --with-fpu=vfp,
with error messages during ./configure, like:

    checking for suffix of object files... configure: error: in `/home/ymor
    in/dev/buildroot/O/build/host-gcc-initial-4.9.3/build/arm-buildroot-lin
    ux-uclibcgnueabihf/libgcc':
    configure: error: cannot compute suffix of object files: cannot compile
    See `config.log' for more details.

And config.log informatively contains:

    sorry, unimplemented: Thumb-1 hard-float VFP ABI

This is an error message that comes deep from gcc source files.

If gcc says it does not support VFP with Thumb1, then let's disable that
combination in our menuconfig.

Prefer VFP over Thumb1, i.e. hide Thumb1 when we're not soft-float.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Gustavo Zacarias <gustavo@zacarias.com.ar>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2015-11-03 23:50:01 +01:00
..
Config.in
Config.in.aarch64
Config.in.arc
Config.in.arm arch/arm: VFP and Thumb1 are not compatible 2015-11-03 23:50:01 +01:00
Config.in.bfin
Config.in.m68k
Config.in.microblaze
Config.in.mips arch: add support for mips32r6 and mips64r6 variants 2015-10-12 21:33:56 +02:00
Config.in.nios2
Config.in.powerpc
Config.in.sh
Config.in.sparc
Config.in.x86 arch/Config.in.x86: drop trailing dot (.) from x1000 URL 2015-10-20 11:32:03 +02:00
Config.in.xtensa