[Minios-devel] [UNIKRAFT PATCH] build: Move -mgeneral-regs-only to optional flag

[Sharan Santhanam <sharan.santhanam@xxxxxxxxx>]

-mgeneral-regs flag was introduced since gcc 7.1 on x86_64. Using
it as a mandatory flag cause compilation error on version less than
7. Hence moving this flag as a optional flag.

Signed-off-by: Sharan Santhanam <sharan.santhanam@xxxxxxxxx>
---
 arch/x86/x86_64/Makefile.uk | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/x86/x86_64/Makefile.uk b/arch/x86/x86_64/Makefile.uk
index 3d0b34d..24919fb 100644
--- a/arch/x86/x86_64/Makefile.uk
+++ b/arch/x86/x86_64/Makefile.uk
@@ -9,7 +9,8 @@ CXXINCLUDES += -I$(CONFIG_UK_BASE)/arch/x86/x86_64/include
 
 # compiler flags to prevent use of extended (FP, SSE, AVX) registers.
 # This is for files that contain trap/exception/interrupt handlers
-ISR_ARCHFLAGS += -mno-80387 -mno-fp-ret-in-387 -mno-mmx -mno-sse -mno-avx 
-mgeneral-regs-only
+ISR_ARCHFLAGS += -mno-80387 -mno-fp-ret-in-387 -mno-mmx -mno-sse -mno-avx
+ISR_ARCHFLAGS-$(call gcc_version_ge,7,1) += -mgeneral-regs-only
 
 ARCHFLAGS-$(CONFIG_MARCH_X86_64_GENERIC)        += -mtune=generic
 ISR_ARCHFLAGS-$(CONFIG_MARCH_X86_64_GENERIC)    += -mtune=generic
-- 
2.7.4


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