toolchain: remove the old BR2_VFP_FLOAT option

Now that we have a much better way of selecting between the various
VFP versions and capabilities, the BR2_VFP_FLOAT version no longer
makes sense. This commit gets rid of it, and adds the appropriate
Config.in.legacy code.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

Config.in.legacy

@@ -76,6 +76,15 @@ config BR2_ELF2FLT
 	  BR2_PACKAGE_HOST_ELF2FLT due to the conversion of elf2flt to
 	  the package infrastructure.
 
+config BR2_VFP_FLOAT
+	bool "the ARM VFP floating point option has been renamed"
+	select BR2_LEGACY
+	help
+	  Due to a major refactoring of the floating-point handling of
+	  the ARM architecture support, the BR2_VFP_FLOAT option has
+	  been replaced with a choice of options that allows to select
+	  between various VFP versions/capabilities.
+
 ###############################################################################
 comment "Legacy options removed in 2013.05"
 

toolchain/toolchain-buildroot/Config.in.2

@@ -28,16 +28,4 @@ config BR2_TOOLCHAIN_BUILDROOT_USE_SSP
 
 source "package/elf2flt/Config.in.host"
 
-config BR2_VFP_FLOAT
-	bool "Use ARM Vector Floating Point unit"
-	depends on !BR2_SOFT_FLOAT
-	depends on BR2_arm || BR2_armeb
-	help
-	  Setting this option will enable the "-mfpu=vfp" option.
-	  If your ARM CPU has a Vector Floating Point Unit (VFP)
-	  and the toolchain supports the option, then the
-	  code can be optimized.
-
-	  Most people will answer N.
-
 endif

toolchain/toolchain-external/ext-tool.mk

@@ -196,11 +196,6 @@ TOOLCHAIN_EXTERNAL_CFLAGS += -msoft-float
 TOOLCHAIN_EXTERNAL_WRAPPER_ARGS += -DBR_SOFTFLOAT=1
 endif
 
-ifeq ($(BR2_VFP_FLOAT),y)
-TOOLCHAIN_EXTERNAL_CFLAGS += -mfpu=vfp
-TOOLCHAIN_EXTERNAL_WRAPPER_ARGS += -DBR_VFPFLOAT=1
-endif
-
 ifeq ($(BR2_TOOLCHAIN_EXTERNAL_DOWNLOAD),y)
 TOOLCHAIN_EXTERNAL_DEPENDENCIES = $(TOOLCHAIN_EXTERNAL_DIR)/.extracted
 endif

toolchain/toolchain-external/ext-toolchain-wrapper.c

@@ -47,9 +47,6 @@ static char *predef_args[] = {
 #ifdef BR_SOFTFLOAT
 	"-msoft-float",
 #endif /* BR_SOFTFLOAT */
-#ifdef BR_VFPFLOAT
-	"-mfpu=vfp",
-#endif /* BR_VFPFLOAT */
 #ifdef BR_64
 	"-m64",
 #endif