[Buildroot] [PATCH v2 26/30] arch/powerpc: get rid of BR2_GCC_TARGET_TUNE
Thomas Petazzoni
thomas.petazzoni at free-electrons.com
Tue Oct 21 20:27:13 UTC 2014
According to the gcc documentation for PowerPC options:
'-mtune=CPU_TYPE'
Set the instruction scheduling parameters for machine type
CPU_TYPE, but do not set the architecture type, register usage, or
choice of mnemonics, as '-mcpu=CPU_TYPE' would. The same values
for CPU_TYPE are used for '-mtune' as for '-mcpu'. If both are
specified, the code generated will use the architecture, registers,
and mnemonics set by '-mcpu', but the scheduling parameters set by
'-mtune'.
In the case of Buildroot where we only target a specific system, using
-mtune therefore doesn't make much sense, and using -mcpu would be
more appropriate. As a consequence, this patch makes PowerPC use
BR2_GCC_TARGET_CPU instead of BR2_GCC_TARGET_TUNE.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998 at free.fr>
---
arch/Config.in.powerpc | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/Config.in.powerpc b/arch/Config.in.powerpc
index 239f5dc..fabee9f 100644
--- a/arch/Config.in.powerpc
+++ b/arch/Config.in.powerpc
@@ -160,7 +160,7 @@ config BR2_ENDIAN
config BR2_ARCH_HAS_ATOMICS
default y
-config BR2_GCC_TARGET_TUNE
+config BR2_GCC_TARGET_CPU
default "401" if BR2_powerpc_401
default "403" if BR2_powerpc_403
default "405" if BR2_powerpc_405
--
2.0.0
More information about the buildroot
mailing list