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toolchain: select sensible floating point mode by default

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Introduce BR2_PREFER_SOFT_FLOAT and enable it for arm, avr32 and mips,
and use it to enable soft float support by default for those archs.

This way people automatically get the correct floating point mode when
running make menuconfig for the first time (E.G. without a .config) and
changing the arch from i386 to arm/avr32/mips.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
This commit is contained in:
Peter Korsgaard 2009-11-09 14:53:04 +01:00
parent 5e5f3209f0
commit 13e753b414
1 changed files with 5 additions and 2 deletions
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7
toolchain/Config.in.2
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@ -74,17 +74,20 @@ config BR2_USE_WCHAR
If you have an external binary toolchain that has been built
with WCHAR support then enable this option.
config BR2_PREFER_SOFT_FLOAT
bool
default y if BR2_arm || BR2_armeb || BR2_avr32 || BR2_mips || BR2_mipsel || BR2_nios2
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 || BR2_nios2
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).
Most people will answer N.
config BR2_USE_SSP
bool "Enable stack protection support"
help