Error : Rapberry Pi 3B+ : unrecognized command line option ‘-mgeneral-regs-only’

[kevinjjames]

Hi,

I am trying to compile the latest rpi-4.14.y branch using defconfig file : arch/arm64/configs/bcmrpi3_defconfig.

The issue is same as #1974. Compilation is failing with the error in subject line.

Using the gcc compiler : tools/arm-bcm2708/arm-rpi-4.9.3-linux-gnueabihf/bin/

The console output is as follows:

kevinjjames@iris ~/raspberrypi/raspian-linux $ make ARCH=arm64 CROSS_COMPILE=${CCPREFIX} bcmrpi3_defconfig

configuration written to .config

kevinjjames@iris ~/raspberrypi/raspian-linux $ make ARCH=arm64 CROSS_COMPILE=${CCPREFIX} -j4
arch/arm64/Makefile:27: ld does not support --fix-cortex-a53-843419; kernel may be susceptible to erratum
scripts/kconfig/conf --silentoldconfig Kconfig
arch/arm64/Makefile:27: ld does not support --fix-cortex-a53-843419; kernel may be susceptible to erratum
CHK include/config/kernel.release
CHK include/generated/uapi/linux/version.h
CHK include/generated/utsrelease.h
CC scripts/mod/empty.o
arm-linux-gnueabihf-gcc: error: unrecognized command line option '-mgeneral-regs-only'
scripts/Makefile.build:328: recipe for target 'scripts/mod/empty.o' failed
make[2]: *** [scripts/mod/empty.o] Error 1
scripts/Makefile.build:587: recipe for target 'scripts/mod' failed
make[1]: *** [scripts/mod] Error 2
Makefile:568: recipe for target 'scripts' failed
make: *** [scripts] Error 2
make: *** Waiting for unfinished jobs....

Any pointers?

Thanks,
Kevin

[popcornmix]

Are you using the newer compiler suggested in linked issue?

[kevinjjames]

Yes

…

On Fri 14 Sep, 2018, 00:39 popcornmix, ***@***.***> wrote: Are you using the newer compiler suggested in linked issue? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#2682 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AE6jA3LwpOdLXZhVfNiaEcpcF7O6yH5Rks5uaq16gaJpZM4WoB-L> .

[popcornmix]

I think CROSS_COMPILE needs to point to a 64 bit cross compiler.

See: https://www.raspberrypi.org/forums/viewtopic.php?t=158127

[kevinjjames]

Actually CROSS_COMPILE is pointing to the 4.6.3 compiler version which was pointed out in the original issue. i.e. tools/arm-bcm2708/arm-rpi-4.9.3-linux-gnueabihf/bin/ Is this a 32 bit cross compiler? As per the original issue, even using the 64 bit cross compiler available in the tools repo, the issue was still seen. Thanks, Kevin

…

On Fri 14 Sep, 2018, 00:49 popcornmix, ***@***.***> wrote: I think CROSS_COMPILE needs to point to a 64 bit cross compiler. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#2682 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AE6jA1hYBDqeyJudOX-lzoE-IrVmdfxsks5uaq_IgaJpZM4WoB-L> .

[popcornmix]

No, you need a cross-compiler for 64-bit arm. e.g.
CROSS_COMPILE=aarch64-linux-gnu
If you are running on Ubuntu,
sudo apt-get install gcc-aarch64-linux-gnu
will likely get it.

[kevinjjames]

Sure, will try that. But is it OK to use the The GNU C compiler for arm64 architecture for building raspbian? I was assuming the compilers in tools repo were specifically for Raspberry Pi and the aarch64-linux-gnu won't have the Pi specific changes?

…

On Fri 14 Sep, 2018, 00:59 popcornmix, ***@***.***> wrote: No, you need a cross-compiler for 64-bit arm. e.g. CROSS_COMPILE=aarch64-linux-gnu If you are running on Ubuntu, sudo apt-get install gcc-aarch64-linux-gnu will likely get it. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#2682 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AE6jAyA2sU99ykEpVSiQLZ3duYGEtcsMks5uarIqgaJpZM4WoB-L> .

[popcornmix]

The gcc we have in our repo is just for convenience. You can use any arm32 or arm64 cross compiler from wherever you want.

[kevinjjames]

Yup. Using CROSS_COMPILE=aarch64-linux-gnu worked.
Also found a page which contains instructions on how to boot the 64bit Image created.
http://www.tal.org/tutorials/booting-64-bit-kernel-raspberry-pi-3

Also read that arm64 doesn't have decompressing capacity; hence "make zImage" won't work. Had to do "make Image".

[Nodi-Rubrum]

Any solution? I am having the same issue.

[popcornmix]

It might help if you explained what your specific problem is.
Assuming you are trying to cross-compile an arm64 kernel then the documentation is being updated in pull request here

You can see the current state here

[Nodi-Rubrum]

I was following the directions posted. But even trying the additional steps for buster 10, I still got the given error. The additional steps were supposed to avoid the error, per the documentation. Not sure if the documentation is wrong or maybe a missing step? or something has changed as buster 10 has matured?

[lurch]

@Nodi-Rubrum Can you provide more details please? "having the same issue" is a bit vague, especially as the original problem was reported 2 years ago.

Which OS are you running? On which platform? Which kernel are you trying to compile? Which steps / instructions have you followed? Which step gives you the error? Please copy'n'paste the error message if possible.

[kevinjjames]

Hi, I quite don't the remember the steps which solved the issue but seems like I was trying to compile the raspian linux with FPU enabled and got the error. Probably using an arm compiler with FPU support might solve the issue. Thanks, Kevin

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On Wed, 16 Sep, 2020, 12:30 Andrew Scheller, ***@***.***> wrote: @Nodi-Rubrum <https://github.com/Nodi-Rubrum> Can you provide more details please? "having the same issue" is a bit vague, especially as the original problem was reported 2 years ago. Which OS are you running? On which platform? Which kernel are you trying to compile? Which steps / instructions have you followed? Which step gives you the error? Please copy'n'paste the error message if possible. — You are receiving this because you modified the open/close state. Reply to this email directly, view it on GitHub <#2682 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABHKGA4QF4JYE6QBGUYCPGTSGBPCLANCNFSM4FVAD6FQ> .