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authorThomas Petazzoni <thomas.petazzoni@free-electrons.com>2013-07-16 08:03:13 (GMT)
committer Peter Korsgaard <jacmet@sunsite.dk>2013-07-16 12:35:07 (GMT)
commit9b3e72b4fd51b63227adad5dbcae8f68333903df (patch)
tree4f70f781064e84369e454d93b374783e805dd7a1
parentd774551787fc737823fe645bb3efd758619690a2 (diff)
downloadbuildroot-9b3e72b4fd51b63227adad5dbcae8f68333903df.tar.gz
buildroot-9b3e72b4fd51b63227adad5dbcae8f68333903df.tar.bz2
arch: Refactor BR2_SOFT_FLOAT into per-architecture options
As we are going to introduced a more advanced support of floating point options for the ARM architecture, we need to adjust how the soft-float option is handled. We replace the current hidden option BR2_PREFER_SOFT_FLOAT option and the visible BR2_SOFT_FLOAT option by: * A global hidden BR2_SOFT_FLOAT option, defined in arch/Config.in, that tells whether the architecture-specific code is using software emulated floating point. This hidden option can be used throughout Buildroot to determine whether soft float is used or not. * Per-architecture visible BR2_<arch>_SOFT_FLOAT options, for the architecture for which it makes sense, which allows users to select soft float emulation when needed. This change will allow each architecture to have a different way of presenting its floating point capabilities. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
-rw-r--r--arch/Config.in3
-rw-r--r--arch/Config.in.arm10
-rw-r--r--arch/Config.in.mips10
-rw-r--r--arch/Config.in.powerpc9
-rw-r--r--toolchain/toolchain-common.in21
5 files changed, 32 insertions, 21 deletions
diff --git a/arch/Config.in b/arch/Config.in
index 5bb96c5..c2dc9e8 100644
--- a/arch/Config.in
+++ b/arch/Config.in
@@ -1,6 +1,9 @@
config BR2_ARCH_IS_64
bool
+config BR2_SOFT_FLOAT
+ bool
+
choice
prompt "Target Architecture"
default BR2_i386
diff --git a/arch/Config.in.arm b/arch/Config.in.arm
index 027dac2..29b2b45 100644
--- a/arch/Config.in.arm
+++ b/arch/Config.in.arm
@@ -79,6 +79,16 @@ endchoice
config BR2_ARM_EABI
def_bool y
+config BR2_ARM_SOFT_FLOAT
+ bool "Use soft-float"
+ default y
+ select BR2_SOFT_FLOAT
+ help
+ If your target CPU does not have a Floating Point Unit (FPU)
+ or a kernel FPU emulator, but you still wish to support
+ floating point functions, then everything will need to be
+ compiled with soft floating point support (-msoft-float).
+
config BR2_ARM_ENABLE_NEON
bool "Enable NEON SIMD extension support"
depends on BR2_ARM_CPU_MAYBE_HAS_NEON
diff --git a/arch/Config.in.mips b/arch/Config.in.mips
index 1454fb4..6242bcc 100644
--- a/arch/Config.in.mips
+++ b/arch/Config.in.mips
@@ -52,6 +52,16 @@ config BR2_MIPS_NABI64
depends on BR2_ARCH_IS_64
endchoice
+config BR2_MIPS_SOFT_FLOAT
+ bool "Use soft-float"
+ default y
+ select BR2_SOFT_FLOAT
+ help
+ If your target CPU does not have a Floating Point Unit (FPU)
+ or a kernel FPU emulator, but you still wish to support
+ floating point functions, then everything will need to be
+ compiled with soft floating point support (-msoft-float).
+
config BR2_ARCH
default "mips" if BR2_mips
default "mipsel" if BR2_mipsel
diff --git a/arch/Config.in.powerpc b/arch/Config.in.powerpc
index 8643efc..ae70a8a 100644
--- a/arch/Config.in.powerpc
+++ b/arch/Config.in.powerpc
@@ -88,6 +88,15 @@ config BR2_powerpc_SPE
depends on BR2_powerpc_8540 || BR2_powerpc_8548
endchoice
+config BR2_POWERPC_SOFT_FLOAT
+ bool "Use soft-float"
+ select BR2_SOFT_FLOAT
+ help
+ If your target CPU does not have a Floating Point Unit (FPU)
+ or a kernel FPU emulator, but you still wish to support
+ floating point functions, then everything will need to be
+ compiled with soft floating point support (-msoft-float).
+
config BR2_ARCH
default "powerpc" if BR2_powerpc
diff --git a/toolchain/toolchain-common.in b/toolchain/toolchain-common.in
index 7c9b842..dc3bd2a 100644
--- a/toolchain/toolchain-common.in
+++ b/toolchain/toolchain-common.in
@@ -90,27 +90,6 @@ config BR2_USE_MMU
If your target has a MMU, you should say Y here. If you
are unsure, just say Y.
-config BR2_PREFER_SOFT_FLOAT
- bool
- default y if BR2_arm
- default y if BR2_armeb
- default y if BR2_avr32
- default y if BR2_mips
- default y if BR2_mipsel
-
-config BR2_SOFT_FLOAT
- bool "Use software floating point by default"
- depends on BR2_arm || BR2_armeb || BR2_avr32 || BR2_mips || BR2_mipsel || BR2_powerpc
- # External toolchains will automatically do soft float or hard
- # float depending on their configuration
- depends on BR2_TOOLCHAIN_BUILDROOT || BR2_TOOLCHAIN_CTNG
- default $(BR2_PREFER_SOFT_FLOAT)
- help
- If your target CPU does not have a Floating Point Unit (FPU) or a
- kernel FPU emulator, but you still wish to support floating point
- functions, then everything will need to be compiled with soft
- floating point support (-msoft-float).
-
config BR2_TARGET_OPTIMIZATION
string "Target Optimizations"
default "-pipe"