arch/csky: specify BR2_GCC_TARGET_FLOAT_ABI

The C-SKY architecture uses two different ABIs, depending on the core
being used:

 - "abiv1" is a mcore based ISA with ELF_NUM:39 and does not support
   FPU & VDSP. It is used only for the ck610 core.

 - "abiv2" is C-SKY's own ISA with ELF_NUM:252 and supports FPU &
   VDSP. It is used for the ck807, ck810, ck860 cores.

Since "abiv1" does not support FPU, BR2_GCC_TARGET_FLOAT_ABI will
always have the value "soft" for the ck610 core.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
[Thomas: rework commit log]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

diff --git a/arch/Config.in.csky b/arch/Config.in.csky
index 1aede81282eabbf9bc0a8e114e48ac42bcd4f4ff..ebde7fe476d06ba1a8df3b385f6750d75e2cefb6 100644 (file)
--- a/arch/Config.in.csky
+++ b/arch/Config.in.csky
@@ -27,6 +27,10 @@ config BR2_CSKY_VDSP
        bool "Enable VDSP enhanced instructions Co-processor"
        depends on BR2_CSKY_FPU
 
+config BR2_GCC_TARGET_FLOAT_ABI
+       default "soft"          if !BR2_CSKY_FPU
+       default "hard"          if BR2_CSKY_FPU
+
 config BR2_ARCH
        default "csky"