[Buildroot] ARCH not being sent by make menuconfig - kernel compile fails to start

[Buildroot] ARCH not being sent by make menuconfig - kernel compile fails to start

[William Pettersson]

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Hash: SHA1

First off, sorry for the cross-post.  I posted this to the busybox
mailing list first, instead of the buildroot list.  My bad there, but
since that was completely the wrong mailing list, I'm posting it here.


So, I'm trying to set up a buildroot image for a soekris net4801.  I ran
make menuconfig, Target Architecture is set to "i386", Target
Architecture Variant is set to "geode".

However, when I run "make", I get the following
(cd /home/wpettersson/src/buildroot/build_/linux-2.6.21.5 ; \
         /usr/bin/make -j1 ARCH= CC="/usr/bin/gcc" \

INSTALL_HDR_PATH=/home/wpettersson/src/buildroot/toolchain_build_/linux
headers_install ; \
        )
make[1]: Entering directory
`/home/wpettersson/src/buildroot/build_/linux-2.6.21.5'
Makefile:491:
/home/wpettersson/src/buildroot/build_/linux-2.6.21.5/arch//Makefile: No
such file or directory
make[1]: *** No rule to make target
`/home/wpettersson/src/buildroot/build_/linux-2.6.21.5/arch//Makefile'.
 Stop.
make[1]: Leaving directory
`/home/wpettersson/src/buildroot/build_/linux-2.6.21.5'
make: ***
[/home/wpettersson/src/buildroot/toolchain_build_/linux/.configured] Error 2

- From the looks of it, "ARCH" isn't being set, which stuffs things up.
I've tested by running the make command manually, with ARCH=i386, and
that seemed to work.

I wasn't sure which configuration files would be required, so to save
space I didn't include any.  If any are wanted, I'll gladly post them.

Anyone know where ARCH is meant to be set?
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[Buildroot] ARCH not being sent by make menuconfig - kernel compile fails to start

[William Pettersson]

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Hash: SHA1



William Pettersson wrote:
> First off, sorry for the cross-post.  I posted this to the busybox
> mailing list first, instead of the buildroot list.  My bad there, but
> since that was completely the wrong mailing list, I'm posting it here.
> 
> 
> So, I'm trying to set up a buildroot image for a soekris net4801.  I ran
> make menuconfig, Target Architecture is set to "i386", Target
> Architecture Variant is set to "geode".
> 
> However, when I run "make", I get the following
> (cd /home/wpettersson/src/buildroot/build_/linux-2.6.21.5 ; \
>          /usr/bin/make -j1 ARCH= CC="/usr/bin/gcc" \
> 
> INSTALL_HDR_PATH=/home/wpettersson/src/buildroot/toolchain_build_/linux
> headers_install ; \
>         )
> make[1]: Entering directory
> `/home/wpettersson/src/buildroot/build_/linux-2.6.21.5'
> Makefile:491:
> /home/wpettersson/src/buildroot/build_/linux-2.6.21.5/arch//Makefile: No
> such file or directory
> make[1]: *** No rule to make target
> `/home/wpettersson/src/buildroot/build_/linux-2.6.21.5/arch//Makefile'.
>  Stop.
> make[1]: Leaving directory
> `/home/wpettersson/src/buildroot/build_/linux-2.6.21.5'
> make: ***
> [/home/wpettersson/src/buildroot/toolchain_build_/linux/.configured] Error 2
> 
> From the looks of it, "ARCH" isn't being set, which stuffs things up.
> I've tested by running the make command manually, with ARCH=i386, and
> that seemed to work.
> 
> I wasn't sure which configuration files would be required, so to save
> space I didn't include any.  If any are wanted, I'll gladly post them.
> 
> Anyone know where ARCH is meant to be set?

Ok, I've investigated some more.  If the Target Architecture Variant is
set to "i386", I get the following

wpettersson ~/buildroot/package/config/buildroot-config $ grep i386 *
auto.conf:BR2_i386=y
auto.conf:BR2_ARCH="i386"
auto.conf:BR2_x86_i386=y
auto.conf:BR2_GCC_TARGET_ARCH="i386"
auto.conf:BR2_GCC_TARGET_TUNE="i386"
autoconf.h:#define BR2_i386 1
autoconf.h:#define BR2_ARCH "i386"
autoconf.h:#define BR2_x86_i386 1
autoconf.h:#define BR2_GCC_TARGET_ARCH "i386"
autoconf.h:#define BR2_GCC_TARGET_TUNE "i386"

However, if I set Target Architecture Variant to "geode", I get
wpettersson ~/buildroot/package/config/buildroot-config $ grep geode *
auto.conf:BR2_x86_geode=y
auto.conf:BR2_GCC_TARGET_ARCH="geode"
auto.conf:BR2_GCC_TARGET_TUNE="geode"
autoconf.h:#define BR2_x86_geode 1
autoconf.h:#define BR2_GCC_TARGET_ARCH "geode"
autoconf.h:#define BR2_GCC_TARGET_TUNE "geode"


So selecting "geode" means that BR2_ARCH doesn't get set.  I'm still
trying to dig through the code, but am I heading in the right direction
with this?


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[Buildroot] ARCH not being sent by make menuconfig - kernel compile fails to start

[William Pettersson]

William Pettersson wrote:
> 
> 
> William Pettersson wrote:
>> First off, sorry for the cross-post.  I posted this to the busybox
>> mailing list first, instead of the buildroot list.  My bad there, but
>> since that was completely the wrong mailing list, I'm posting it here.
> 
> 
>> So, I'm trying to set up a buildroot image for a soekris net4801.  I ran
>> make menuconfig, Target Architecture is set to "i386", Target
>> Architecture Variant is set to "geode".
> 
>> However, when I run "make", I get the following
>> (cd /home/wpettersson/src/buildroot/build_/linux-2.6.21.5 ; \
>>          /usr/bin/make -j1 ARCH= CC="/usr/bin/gcc" \
> 
>> INSTALL_HDR_PATH=/home/wpettersson/src/buildroot/toolchain_build_/linux
>> headers_install ; \
>>         )
>> make[1]: Entering directory
>> `/home/wpettersson/src/buildroot/build_/linux-2.6.21.5'
>> Makefile:491:
>> /home/wpettersson/src/buildroot/build_/linux-2.6.21.5/arch//Makefile: No
>> such file or directory
>> make[1]: *** No rule to make target
>> `/home/wpettersson/src/buildroot/build_/linux-2.6.21.5/arch//Makefile'.
>>  Stop.
>> make[1]: Leaving directory
>> `/home/wpettersson/src/buildroot/build_/linux-2.6.21.5'
>> make: ***
>> [/home/wpettersson/src/buildroot/toolchain_build_/linux/.configured] Error 2
> 
>> From the looks of it, "ARCH" isn't being set, which stuffs things up.
>> I've tested by running the make command manually, with ARCH=i386, and
>> that seemed to work.
> 
>> I wasn't sure which configuration files would be required, so to save
>> space I didn't include any.  If any are wanted, I'll gladly post them.
> 
>> Anyone know where ARCH is meant to be set?
> 
> Ok, I've investigated some more.  If the Target Architecture Variant is
> set to "i386", I get the following
> 
> wpettersson ~/buildroot/package/config/buildroot-config $ grep i386 *
> auto.conf:BR2_i386=y
> auto.conf:BR2_ARCH="i386"
> auto.conf:BR2_x86_i386=y
> auto.conf:BR2_GCC_TARGET_ARCH="i386"
> auto.conf:BR2_GCC_TARGET_TUNE="i386"
> autoconf.h:#define BR2_i386 1
> autoconf.h:#define BR2_ARCH "i386"
> autoconf.h:#define BR2_x86_i386 1
> autoconf.h:#define BR2_GCC_TARGET_ARCH "i386"
> autoconf.h:#define BR2_GCC_TARGET_TUNE "i386"
> 
> However, if I set Target Architecture Variant to "geode", I get
> wpettersson ~/buildroot/package/config/buildroot-config $ grep geode *
> auto.conf:BR2_x86_geode=y
> auto.conf:BR2_GCC_TARGET_ARCH="geode"
> auto.conf:BR2_GCC_TARGET_TUNE="geode"
> autoconf.h:#define BR2_x86_geode 1
> autoconf.h:#define BR2_GCC_TARGET_ARCH "geode"
> autoconf.h:#define BR2_GCC_TARGET_TUNE "geode"
> 
> 
> So selecting "geode" means that BR2_ARCH doesn't get set.  I'm still
> trying to dig through the code, but am I heading in the right direction
> with this?
> 
> 

Ok, I've attached a patch which might fix this.  Config.in doesn't set
BR2_ARCH at all for geode, so I patched it to set BR2_ARCH to "i586".
Now I'm just trying to work out why gcc-4.2.0 has issues with
./configure and --with-arch=geode.

Will
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