package/gcc: Introduce BR2_GCC_TARGET_SIMD option

Introduce BR2_GCC_TARGET_SIMD for gcc to handle --with-simd/-msimd
present at loongarch's gcc options.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Reviewed-by: Romain Naour <romain.naour@smile.fr>
Signed-off-by: Julien Olivain <ju.o@free.fr>

arch/Config.in

@@ -353,6 +353,12 @@ config BR2_GCC_TARGET_FPU
 config BR2_GCC_TARGET_FLOAT_ABI
 	string
 
+# The value of this option will be passed as --with-simd=<value> when
+# building gcc (internal backend) or -simd=<value> in the toolchain
+# wrapper (external toolchain)
+config BR2_GCC_TARGET_SIMD
+	string
+
 # The value of this option will be passed as --with-mode=<value> when
 # building gcc (internal backend) or -m<value> in the toolchain
 # wrapper (external toolchain)

arch/arch.mk

@@ -16,6 +16,7 @@ GCC_TARGET_FP32_MODE := $(call qstrip,$(BR2_GCC_TARGET_FP32_MODE))
 GCC_TARGET_CPU := $(call qstrip,$(BR2_GCC_TARGET_CPU))
 GCC_TARGET_FPU := $(call qstrip,$(BR2_GCC_TARGET_FPU))
 GCC_TARGET_FLOAT_ABI := $(call qstrip,$(BR2_GCC_TARGET_FLOAT_ABI))
+GCC_TARGET_SIMD := $(call qstrip,$(BR2_GCC_TARGET_SIMD))
 GCC_TARGET_MODE := $(call qstrip,$(BR2_GCC_TARGET_MODE))
 
 # Explicitly set LD's "max-page-size" instead of relying on some defaults

package/gcc/gcc.mk

@@ -251,6 +251,10 @@ ifneq ($(GCC_TARGET_FLOAT_ABI),)
 HOST_GCC_COMMON_CONF_OPTS += --with-float=$(GCC_TARGET_FLOAT_ABI)
 endif
 
+ifneq ($(GCC_TARGET_SIMD),)
+HOST_GCC_COMMON_CONF_OPTS += --with-simd=$(GCC_TARGET_SIMD)
+endif
+
 ifneq ($(GCC_TARGET_MODE),)
 HOST_GCC_COMMON_CONF_OPTS += --with-mode=$(GCC_TARGET_MODE)
 endif

toolchain/toolchain-external/pkg-toolchain-external.mk

@@ -217,6 +217,10 @@ ifneq ($(GCC_TARGET_FLOAT_ABI),)
 TOOLCHAIN_EXTERNAL_CFLAGS += -mfloat-abi=$(GCC_TARGET_FLOAT_ABI)
 TOOLCHAIN_EXTERNAL_TOOLCHAIN_WRAPPER_ARGS += -DBR_FLOAT_ABI='"$(GCC_TARGET_FLOAT_ABI)"'
 endif
+ifneq ($(GCC_TARGET_SIMD),)
+TOOLCHAIN_EXTERNAL_CFLAGS += -msimd=$(GCC_TARGET_SIMD)
+TOOLCHAIN_EXTERNAL_TOOLCHAIN_WRAPPER_ARGS += -DBR_SIMD='"$(GCC_TARGET_SIMD)"'
+endif
 ifneq ($(GCC_TARGET_MODE),)
 TOOLCHAIN_EXTERNAL_CFLAGS += -m$(GCC_TARGET_MODE)
 TOOLCHAIN_EXTERNAL_TOOLCHAIN_WRAPPER_ARGS += -DBR_MODE='"$(GCC_TARGET_MODE)"'

toolchain/toolchain-wrapper.c

@@ -77,6 +77,9 @@ static char *predef_args[] = {
 #ifdef BR_SOFTFLOAT
 	"-msoft-float",
 #endif /* BR_SOFTFLOAT */
+#ifdef BR_SIMD
+	"-msimd=" BR_SIMD,
+#endif
 #ifdef BR_MODE
 	"-m" BR_MODE,
 #endif