Cross Compiler Toolchains [Linaro GCC 5.2 2015-11, 4.9, 4.8, 4.7]

[Christopher83]

Linaro GCC 4.9.3 2015.01 Toolchain for Cortex-A7

Since someone could be interested, I released a new Linaro GCC 4.9.3 2015.01 Toolchain optimized for Cortex-A7 with Neon-VFPv4 technology support.
This toolchain is suitable , for example, for devices that have a recent Qualcomm Snapdragon 200 or 400 cpu.

 

[javelinanddart]

Since someone could be interested, I released a new Linaro GCC 4.9.3 2015.01 Toolchain optimized for Cortex-A7 with Neon-VFPv4 technology support.
This toolchain is suitable , for example, for devices that have a Qualcomm Snapdragon 200 or 400 cpu.

I have the Snapdragon S4 Plus which is the predecessor to the Snapdragon 200 and 400 and I use the Cortex-A15 Compiler. I know the Snapdragon S4 and all it's Variants have a Cortex A15 Architecture so wouldn't it mean that the 200 and 400 have it too?

 

[Christopher83]

I have the Snapdragon S4 Plus which is the predecessor to the Snapdragon 200 and 400 and I use the Cortex-A15 Compiler. I know the Snapdragon S4 and all it's Variants have a Cortex A15 Architecture so wouldn't it mean that the 200 and 400 have it too?

Qualcomm Snapdragon 400 and 200 have different cpu options...

Qualcomm Snapdragon 400:
- Quad ARM Cortex-A7 CPU at up to 1.6GHz per core
- Dual core Krait 300 CPU at up to 1.7GHz per core
- Dual core Krait 200 CPU at up to 1.2GHz per core

Qualcomm Snapdragon 200:
- Quad ARM Cortex A7 CPU at up to 1.2GHz per core
- Quad ARM Cortex A5 CPU at up to 1.4GHz per core

 

[javelinanddart]

Qualcomm Snapdragon 400 and 200 have different cpu options...

Qualcomm Snapdragon 400:
- Quad ARM Cortex-A7 CPU at up to 1.6GHz per core
- Dual core Krait 300 CPU at up to 1.7GHz per core
- Dual core Krait 200 CPU at up to 1.2GHz per core

Qualcomm Snapdragon 200:
- Quad ARM Cortex A7 CPU at up to 1.2GHz per core
- Quad ARM Cortex A5 CPU at up to 1.4GHz per core

Ah OK. So the Snapdragon 400 with the Krait CPU will have Cortex A15 but the ones with the Cortex-A7 will not. Thanks!

 

[knizmi]

Since someone could be interested, I released a new Linaro GCC 4.9.3 2015.01 Toolchain optimized for Cortex-A7 with Neon-VFPv4 technology support.
This toolchain is suitable , for example, for devices that have a recent Qualcomm Snapdragon 200 or 400 cpu.

Thanks for this. Is the Cortex-A7 toolchain any different from Cortex-A15 though? I've always thought that you don't build Cortex-A7 because it would be the same as A15.

 

[bedalus]

Since someone could be interested, I released a new Linaro GCC 4.9.3 2015.01 Toolchain optimized for Cortex-A7 with Neon-VFPv4 technology support.
This toolchain is suitable , for example, for devices that have a recent Qualcomm Snapdragon 200 or 400 cpu.

Ooo, good stuff, thank you. I'm on a moto G now so this is quite handy!

 

[sparksco]

Ah OK. So the Snapdragon 400 with the Krait CPU will have Cortex A15 but the ones with the Cortex-A7 will not. Thanks!

It doesn't matter what flags were used to compile the toolchains. It only matters what's used when you compile the ROMs or kernels.

 

[gimmeitorilltell]

Hello I am trying to get the SGH-I717 booting for android 5.0 but always get a black screen or stuck at samsung logo. Some specs: TARGET_ARCH_VARIANT=armv7-a-neon
TARGET_CPU_VARIANT=scorpion
I have tried these toolchains with no luck: linaro-4.7-12.10 & arm-linux-androideabi-4.7, Any suggestions please?

EDIT: I am trying the memset commits now.

 

[sparksco]

Hello I am trying to get the SGH-I717 booting for android 5.0 but always get a black screen or stuck at samsung logo. Some specs: TARGET_ARCH_VARIANT=armv7-a-neon
TARGET_CPU_VARIANT=scorpion
I have tried these toolchains with no luck: linaro-4.7-12.10 & arm-linux-androideabi-4.7, Any suggestions please?

I think android 5 only uses gcc 4.8... I could be wrong but have you tried a 4.8 toolchain?

 

[gimmeitorilltell]

I think android 5 only uses gcc 4.8... I could be wrong but have you tried a 4.8 toolchain?

Yes I sure have and it is the same thing, black screen. I don't even get the samsung logo.

 

[Zippy Dufus]

Yes I sure have and it is the same thing, black screen. I don't even get the samsung logo.

Check the your kernel's ../lib/memset.S file. Older kernels have a version that Linaro generates buggy code for.

 

[gimmeitorilltell]

Check the your kernel's ../lib/memset.S file. Older kernels have a version that Linaro generates buggy code for.

After updating the memset I am now getting the "samsung" logo afte I reboot but it still seems to get stuck there.

EDIT: Here is what I done with that memset file memset.s

 

[poondog]

After updating the memset I am now getting the "samsung" logo afte I reboot but it still seems to get stuck there.

EDIT: Here is what I done with that memset file memset.s

Hi buddy, in my experience there are 2 commits, not one

One is fix GCC memset crashes something
Other is fix the memset fix

 

[karandpr]

These are the two commits

https://github.com/karandpr/Doppler3ICS/commit/9c195f50f1779243295a109e59ced50b5eba7e10
https://github.com/karandpr/Doppler3ICS/commit/284ea373f16ab8859ab09d3e19a93c3fd6b63bc2

 

[gimmeitorilltell]

Hi buddy, in my experience there are 2 commits, not one

One is fix GCC memset crashes something
Other is fix the memset fix

These are the two commits

https://github.com/karandpr/Doppler3ICS/commit/9c195f50f1779243295a109e59ced50b5eba7e10
https://github.com/karandpr/Doppler3ICS/commit/284ea373f16ab8859ab09d3e19a93c3fd6b63bc2

Thank you both for this & the location of both commits. I will try them both this time.

 

[Tkkg1994]

Hey mates
Got a question to you. I'm developing a kernel for the Galaxy Tab S (SM-T805) and this one has an exynos processor (5430 I think). Thisone gots two different cores, A7 and A15.
So my question, which toolchain should I use for the kernel? Better the normal, not optimized, A15 optimized or A7 optimized?
Thanks in advance guys! :highfive:

 

[educk]

Hey mates
Got a question to you. I'm developing a kernel for the Galaxy Tab S (SM-T805) and this one has an exynos processor (5430 I think). Thisone gots two different cores, A7 and A15.
So my question, which toolchain should I use for the kernel? Better the normal, not optimized, A15 optimized or A7 optimized?
Thanks in advance guys! :highfive:

I think the generic toolchains should suit Exynos chips I'm not very sure though...

Sent from my Nexus 5 using XDA Free mobile app

 

[gimmeitorilltell]

I wanted to thank everyone for your help. I've finally gotten the Note to boot with 4.7. Now to work on that 4.8 toolchain.

 

[sparksco]

I wanted to thank everyone for your help. I've finally gotten the Note to boot with 4.7. Now to work on that 4.8 toolchain.

There's a big difference between 4.7 and 4.8. If you get to 4.8, 4.9 will be a breeze.

 

[gimmeitorilltell]

There's a big difference between 4.7 and 4.8. If you get to 4.8, 4.9 will be a breeze.

Well I finally got it booting with 4.8, so again, a HUGE thanks to all that contributed their knowledge in helping!