aarch64 external-toolchain multilib support

aarch64 external-toolchain multilib support

[d.sabato]

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Hello,
I use pre-built external ARM toolchain to build iMx8 distro 64 bit.

TCMODE = "external-arm"
EXTERNAL_TOOLCHAIN = "/opt/arm-gnu-toolchain-13.2.Rel1-x86_64-aarch64-none-linux-gnu"

I'd like to generate 32bit version of libraries for my sysroot so I add following in my build/local.conf :

require conf/multilib.conf
MULTILIBS = "multilib:lib32"
DEFAULTTUNE:virtclass-multilib-lib32 = "armv7athf-neon"
IMAGE_INSTALL:append := " lib32-glibc lib32-libgcc lib32-libstdc++"

Am I doing right ?

Build Configuration:
BB_VERSION           = "2.4.0"
BUILD_SYS            = "x86_64-linux"
NATIVELSBSTRING      = "debian-12"
TARGET_SYS           = "aarch64-oe-linux"
TUNE_FEATURES        = "aarch64 armv8a crc cortexa53 crypto"
TARGET_FPU           = ""
meta                 = "master:3c35416a8bff3a857004beadbd053d50eca30ce2"
meta-oe
meta-networking
meta-python
meta-filesystems     = "master:39968837196cb48209b71e8852dd04a2f8ccdca8"
meta-freescale       = "master:7f0a7f3d19f564da0faf20e279b1b18a7f0068b6"
meta-arm-toolchain
meta-arm             = "master:9bcc166bd5bb717aa86bb0464621a36abc51fa19"

Thank you,
Danilo

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Re: [meta-arm] aarch64 external-toolchain multilib support

[Denys Dmytriyenko]

Unlike x86, there are separate compilers for 64bit Arm and 32bit Arm. The 
external toolchain you use is aarch64-none-linux-gnu and is for 64bit, while 
32bit toolchain is called arm-none-linux-gnueabihf. TCMODE=external-arm does 
not support dual toolchains at the same time, hence no multilib.


On Tue, Feb 27, 2024 at 09:51:47AM -0800, d.sabato via lists.yoctoproject.org wrote:
> Hello,
> I use pre-built external ARM toolchain to build iMx8 distro 64 bit.
> 
> TCMODE = "external-arm"
> EXTERNAL_TOOLCHAIN = "/opt/arm-gnu-toolchain-13.2.Rel1-x86_64-aarch64-none-linux-gnu"
> 
> I'd like to generate 32bit version of libraries for my sysroot so I add following in my build/local.conf :
> 
> require conf/multilib.conf
> MULTILIBS = "multilib:lib32"
> DEFAULTTUNE:virtclass-multilib-lib32 = "armv7athf-neon"
> IMAGE_INSTALL:append := " lib32-glibc lib32-libgcc lib32-libstdc++"
> 
> Am I doing right ?
> 
> Build Configuration:
> BB_VERSION           = "2.4.0"
> BUILD_SYS            = "x86_64-linux"
> NATIVELSBSTRING      = "debian-12"
> TARGET_SYS           = "aarch64-oe-linux"
> TUNE_FEATURES        = "aarch64 armv8a crc cortexa53 crypto"
> TARGET_FPU           = ""
> meta                 = "master:3c35416a8bff3a857004beadbd053d50eca30ce2"
> meta-oe
> meta-networking
> meta-python
> meta-filesystems     = "master:39968837196cb48209b71e8852dd04a2f8ccdca8"
> meta-freescale       = "master:7f0a7f3d19f564da0faf20e279b1b18a7f0068b6"
> meta-arm-toolchain
> meta-arm             = "master:9bcc166bd5bb717aa86bb0464621a36abc51fa19"
> 
> Thank you,
> Danilo