arch: improve definition of gcc mtune, mcpu, etc.
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>
2012-11-15 04:53:48 +01:00
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config BR2_ARCH
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default "m68k" if BR2_m68k
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config BR2_ENDIAN
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default "BIG"
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2016-04-29 19:51:23 +02:00
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# symbols used to distinguish between m68k and coldfire
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# for gcc multilib
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config BR2_m68k_m68k
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bool
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config BR2_m68k_cf
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bool
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2016-03-19 20:04:10 +01:00
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# coldfire variants will be added later
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choice
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prompt "Target CPU"
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depends on BR2_m68k
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default BR2_m68k_68040
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help
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Specific CPU variant to use
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config BR2_m68k_68040
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bool "68040"
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2016-04-29 19:51:23 +02:00
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select BR2_m68k_m68k
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select BR2_ARCH_HAS_MMU_MANDATORY
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config BR2_m68k_cf5208
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bool "5208"
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select BR2_m68k_cf
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select BR2_SOFT_FLOAT
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2016-03-19 20:04:10 +01:00
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endchoice
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config BR2_GCC_TARGET_CPU
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2012-11-15 04:53:53 +01:00
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default "68040" if BR2_m68k_68040
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2016-04-29 19:51:23 +02:00
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default "5208" if BR2_m68k_cf5208
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