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arch: improve definition of gcc mtune, mcpu, etc.

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As suggested by Yann E. Morin, there is a better way than our current
big Config.in.common to define the gcc mtune, mcpu, march,
etc. values. We can split the setting of those values in each
architecture file, which makes a lot more sense.

Therefore, the Config.in file now creates empty kconfig variables
BR2_ARCH, BR2_ENDIAN, BR2_GCC_TARGET_TUNE, BR2_GCC_TARGET_ARCH,
BR2_GCC_TARGET_ABI and BR2_GCC_TARGET_CPU. The values of those
variables are set by the individual Config.in.<arch> files. This is
possible because such files are now only conditionally included
depending on the top-level architecture that has been selected.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
This commit is contained in:
Thomas Petazzoni
2012-11-15 03:53:48 +00:00
committed by Peter Korsgaard
parent 53adfc5f49
commit 44c04a2b4a
13 changed files with 361 additions and 249 deletions
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17
arch/Config.in.sh
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@@ -22,3 +22,20 @@ config BR2_sh4a
config BR2_sh4aeb
bool "sh4aeb (SH4A big endian)"
endchoice
config BR2_ARCH
default "sh2" if BR2_sh2
default "sh2a" if BR2_sh2a
default "sh3" if BR2_sh3
default "sh3eb" if BR2_sh3eb
default "sh4" if BR2_sh4
default "sh4eb" if BR2_sh4eb
default "sh4a" if BR2_sh4a
default "sh4aeb" if BR2_sh4aeb
default "sh64" if BR2_sh64
config BR2_ENDIAN
default "LITTLE" if BR2_sh3 || BR2_sh4 || BR2_sh4a || \
BR2_x86_64 || BR2_sh64
default "BIG" if BR2_sh2 || BR2_sh2a || BR2_sh3eb || \
BR2_sh4eb || BR2_sh4aeb