[PATCH v2 1/2] sh: guard SH4 no-FPU compiler fallback

[Artem Novak]

The SH4 compiler flag selection falls back to -m4-nofpu when
-mno-implicit-fp is unavailable without checking whether the compiler
supports -m4-nofpu itself.

This breaks SH4A-only toolchains which support -m4a and -m4a-nofpu
but do not provide the plain SH4 -m4-nofpu option.

Use a nested cc-option so the fallback is emitted only when supported.

Signed-off-by: Artem Novak <artem122novak@xxxxxxxxx>
---
 arch/sh/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/sh/Makefile b/arch/sh/Makefile
index 7b420424b6d7..238c701ab14b 100644
--- a/arch/sh/Makefile
+++ b/arch/sh/Makefile
@@ -36,7 +36,7 @@ cflags-$(CONFIG_CPU_SH2A)		+= $(call cc-option,-m2a,) \
 					   $(call cc-option,-m4-nofpu,)
 cflags-$(CONFIG_CPU_SH3)		:= $(call cc-option,-m3,)
 cflags-$(CONFIG_CPU_SH4)		:= $(call cc-option,-m4,) \
-	$(call cc-option,-mno-implicit-fp,-m4-nofpu)
+	$(call cc-option,-mno-implicit-fp,$(call cc-option,-m4-nofpu,))
 cflags-$(CONFIG_CPU_SH4A)		+= $(call cc-option,-m4a,) \
 					   $(call cc-option,-m4a-nofpu,)
 cflags-$(CONFIG_CPU_SH4AL_DSP)		+= $(call cc-option,-m4al,)
-- 
2.55.0