toolchain/gcc: use --disable-decimal-float for 4.3.x

toolchain/gcc/gcc-uclibc-4.x.mk

@@ -141,6 +141,10 @@ ifeq ($(BR2_KERNEL_HURD),y)
 EXTRA_GCC1_CONFIG_OPTIONS+=--without-headers
 endif
 
+ifeq ($(BR2_GCC_SUPPORTS_FINEGRAINEDMTUNE),y)
+GCC_DECIMAL_FLOAT:=--disable-decimal-float
+endif
+
 HOST_SOURCE+=gcc-source
 
 $(DL_DIR)/$(GCC_SOURCE):
@@ -211,6 +215,7 @@ $(GCC_BUILD_DIR1)/.configured: $(GCC_DIR)/.patched
 		$(DISABLE_NLS) \
 		$(THREADS) \
 		$(MULTILIB) \
+		$(GCC_DECIMAL_FLOAT) \
 		$(SOFT_FLOAT_CONFIG_OPTION) \
 		$(GCC_WITH_ABI) $(GCC_WITH_ARCH) $(GCC_WITH_TUNE) \
 		$(EXTRA_GCC_CONFIG_OPTIONS) \
@@ -284,6 +289,7 @@ $(GCC_BUILD_DIR2)/.configured: $(GCC_SRC_DIR)/.patched $(GCC_STAGING_PREREQ)
 		$(DISABLE_NLS) \
 		$(THREADS) \
 		$(MULTILIB) \
+		$(GCC_DECIMAL_FLOAT) \
 		$(SOFT_FLOAT_CONFIG_OPTION) \
 		$(GCC_WITH_ABI) $(GCC_WITH_ARCH) $(GCC_WITH_TUNE) \
 		$(GCC_USE_SJLJ_EXCEPTIONS) \
@@ -429,6 +435,7 @@ $(GCC_BUILD_DIR3)/.configured: $(GCC_BUILD_DIR3)/.prepared
 		$(DISABLE_NLS) \
 		$(THREADS) \
 		$(MULTILIB) \
+		$(GCC_DECIMAL_FLOAT) \
 		$(SOFT_FLOAT_CONFIG_OPTION) \
 		$(GCC_WITH_ABI) $(GCC_WITH_ARCH) $(GCC_WITH_TUNE) \
 		$(GCC_USE_SJLJ_EXCEPTIONS) \