On Tue, Jan 22, 2013 at 9:44 PM, Darren Hart <dvh...@linux.intel.com> wrote:
>
>
> On 01/19/2013 02:40 PM, Khem Raj wrote:
>> kernel compiler is not special and we currently have it so
>> we want to pass -march and -mtune options as CFLAGS to kernel
>> build so that compiler picks the right subarch flags when
>> compiling assembly files in particular. Otherwise defaults
>> are chosen which may not be right in many case e.g. when
>> compiling kernel for collie machine we should use arch=armv4
>> but it uses toolchain/as defaults which is armv5te
>>
>> in some case e.g. thumb1 we know that kernel can not be compiled
>> in thumb1 mode so we can provide that information e.g. -marm
>> option through KERNEL_HOST_CC_ARCH variable as we do now
>>
>
> Makes me nervous... only because I'm not well versed enough across the
> architectures to catch some little gotchas. How much testing has this
> seen? Which architectures?
>
I've built and booted kernels for strongarm/armv4) and for pxa/armv5te.
Andrea
> --
> Darren
>
>> Signed-off-by: Khem Raj <raj.k...@gmail.com>
>> ---
>> meta/classes/kernel-arch.bbclass | 13 +++++++++++++
>> meta/classes/kernel.bbclass | 16 +---------------
>> meta/classes/module-base.bbclass | 16 ----------------
>> 3 files changed, 14 insertions(+), 31 deletions(-)
>>
>> diff --git a/meta/classes/kernel-arch.bbclass
>> b/meta/classes/kernel-arch.bbclass
>> index b3b78b6..a51e82b 100644
>> --- a/meta/classes/kernel-arch.bbclass
>> +++ b/meta/classes/kernel-arch.bbclass
>> @@ -43,3 +43,16 @@ def map_uboot_arch(a, d):
>>
>> export UBOOT_ARCH = "${@map_uboot_arch(d.getVar('ARCH', True), d)}"
>>
>> +# Set TARGET_??_KERNEL_ARCH in the machine .conf to set architecture
>> +# specific options necessary for building the kernel and modules.
>> +TARGET_CC_KERNEL_ARCH ?= ""
>> +HOST_CC_KERNEL_ARCH ?= "${TARGET_CC_KERNEL_ARCH}"
>> +TARGET_LD_KERNEL_ARCH ?= ""
>> +HOST_LD_KERNEL_ARCH ?= "${TARGET_LD_KERNEL_ARCH}"
>> +TARGET_AR_KERNEL_ARCH ?= ""
>> +HOST_AR_KERNEL_ARCH ?= "${TARGET_AR_KERNEL_ARCH}"
>> +
>> +KERNEL_CC = "${CC} ${HOST_CC_KERNEL_ARCH}"
>> +KERNEL_LD = "${LD} ${HOST_LD_KERNEL_ARCH}"
>> +KERNEL_AR = "${AR} ${HOST_AR_KERNEL_ARCH}"
>> +
>> diff --git a/meta/classes/kernel.bbclass b/meta/classes/kernel.bbclass
>> index d459569..e2a582b 100644
>> --- a/meta/classes/kernel.bbclass
>> +++ b/meta/classes/kernel.bbclass
>> @@ -1,7 +1,7 @@
>> inherit linux-kernel-base module_strip
>>
>> PROVIDES += "virtual/kernel"
>> -DEPENDS += "virtual/${TARGET_PREFIX}gcc kmod-native
>> virtual/${TARGET_PREFIX}gcc${KERNEL_CCSUFFIX}"
>> +DEPENDS += "virtual/${TARGET_PREFIX}gcc kmod-native"
>>
>> # we include gcc above, we dont need virtual/libc
>> INHIBIT_DEFAULT_DEPS = "1"
>> @@ -37,20 +37,6 @@ KERNEL_PRIORITY ?=
>> "${@int(d.getVar('PV',1).split('-')[0].split('+')[0].split('.
>>
>> KERNEL_RELEASE ?= "${KERNEL_VERSION}"
>>
>> -KERNEL_CCSUFFIX ?= ""
>> -KERNEL_LDSUFFIX ?= ""
>> -
>> -# Set TARGET_??_KERNEL_ARCH in the machine .conf to set architecture
>> -# specific options necessary for building the kernel and modules.
>> -#FIXME: should be this: TARGET_CC_KERNEL_ARCH ?= "${TARGET_CC_ARCH}"
>> -TARGET_CC_KERNEL_ARCH ?= ""
>> -HOST_CC_KERNEL_ARCH ?= "${TARGET_CC_KERNEL_ARCH}"
>> -TARGET_LD_KERNEL_ARCH ?= ""
>> -HOST_LD_KERNEL_ARCH ?= "${TARGET_LD_KERNEL_ARCH}"
>> -
>> -KERNEL_CC = "${CCACHE}${HOST_PREFIX}gcc${KERNEL_CCSUFFIX}
>> ${HOST_CC_KERNEL_ARCH}${TOOLCHAIN_OPTIONS}"
>> -KERNEL_LD = "${HOST_PREFIX}ld${KERNEL_LDSUFFIX}
>> ${HOST_LD_KERNEL_ARCH}${TOOLCHAIN_OPTIONS}"
>> -
>> # Where built kernel lies in the kernel tree
>> KERNEL_OUTPUT ?= "arch/${ARCH}/boot/${KERNEL_IMAGETYPE}"
>> KERNEL_IMAGEDEST = "boot"
>> diff --git a/meta/classes/module-base.bbclass
>> b/meta/classes/module-base.bbclass
>> index 210c47c..cfee50a 100644
>> --- a/meta/classes/module-base.bbclass
>> +++ b/meta/classes/module-base.bbclass
>> @@ -7,22 +7,6 @@ export CROSS_COMPILE = "${TARGET_PREFIX}"
>>
>> export KERNEL_VERSION =
>> "${@base_read_file('${STAGING_KERNEL_DIR}/kernel-abiversion')}"
>> KERNEL_OBJECT_SUFFIX = ".ko"
>> -KERNEL_CCSUFFIX =
>> "${@base_read_file('${STAGING_KERNEL_DIR}/kernel-ccsuffix')}"
>> -KERNEL_LDSUFFIX =
>> "${@base_read_file('${STAGING_KERNEL_DIR}/kernel-ldsuffix')}"
>> -KERNEL_ARSUFFIX =
>> "${@base_read_file('${STAGING_KERNEL_DIR}/kernel-arsuffix')}"
>> -
>> -# Set TARGET_??_KERNEL_ARCH in the machine .conf to set architecture
>> -# specific options necessary for building the kernel and modules.
>> -TARGET_CC_KERNEL_ARCH ?= ""
>> -HOST_CC_KERNEL_ARCH ?= "${TARGET_CC_KERNEL_ARCH}"
>> -TARGET_LD_KERNEL_ARCH ?= ""
>> -HOST_LD_KERNEL_ARCH ?= "${TARGET_LD_KERNEL_ARCH}"
>> -TARGET_AR_KERNEL_ARCH ?= ""
>> -HOST_AR_KERNEL_ARCH ?= "${TARGET_AR_KERNEL_ARCH}"
>> -
>> -KERNEL_CC = "${CCACHE}${HOST_PREFIX}gcc${KERNEL_CCSUFFIX}
>> ${HOST_CC_KERNEL_ARCH}"
>> -KERNEL_LD = "${HOST_PREFIX}ld${KERNEL_LDSUFFIX} ${HOST_LD_KERNEL_ARCH}"
>> -KERNEL_AR = "${HOST_PREFIX}ar${KERNEL_ARSUFFIX} ${HOST_AR_KERNEL_ARCH}"
>>
>> # kernel modules are generally machine specific
>> PACKAGE_ARCH = "${MACHINE_ARCH}"
>>
>
> --
> Darren Hart
> Intel Open Source Technology Center
> Yocto Project - Technical Lead - Linux Kernel
>
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