[Solved, more or less] OpenWRT C++ CrossCompile uClibc setup

[Alexander Pitzer]

Thank you for your suggestion,

I know that a lot of people just use the SDK to compile programs, but I want to get the openWRT package CrossCompile environment to work. I want to create packages that I can install on the onion (.ipk packages if I'm remember correctly). I don't know how to get the toolchain you suggested into the openWRT environment, so if you have an Idea how to do that, it would be perfect

I mean someone compiles their packages with the correct toolchain/setup and provide this packages to us, don't they?

[Boken Lin]

Hi @Alexander-Pitzer, In the make menuconfig system, go into Advanced configuration options (for developers) > Toolchain Options > C Library implementation. You just need to switch from musl to uClibc.

[Alexander Pitzer]

@Boken-Lin

Yeah I tried this before, too. But there is no option for uClibc....
May it be possible to poste a .conf with the right kernel settings?

Because the dependency for uClibc contains : .... && !mips [=y] && ....
and mips is set by: .... || TARGET_ar71xx_generic [=y] && <choice> && TARGET_ar71xx [=y] || ....

[Boken Lin]

@Alexander-Pitzer that's quite strange. Where did you get the buildroot files?

[Alexander Pitzer]

@Boken-Lin

https://github.com/OnionIoT/OpenWRT-Packages/wiki/Setting-Up-the-Cross-Compile-Environment#step-2-get-openwrt-source

I believe I found the problem, in the current version of openWRT uClibc is available if broken packages are allowed. RIght now I compile the toolchain: toolchain-mips_34kc_gcc-5.2.0_uClibc-1.0.9
They switched to uClibc-ng-1.0.9

8e493a4b7c0749bf65cfd545ca18b384bc1d4f32    12/03/2015 03:47 PM
uClibc-ng: update to 1.0.9

Update to 1.0.9, switch to XZ tarball.

Signed-off-by: Waldemar Brodkorb <wbx@uclibc-ng.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@47715 3c298f89-4303-0410-b956-a3cf2f4a3e73

b70a36d1d969f5aa9ad081c9a395633793582a5a  11/02/2015 07:12 PM

uclibc: remove version 0.9.33

Latest uClibc-ng is now the only supported option

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@47357 3c298f89-4303-0410-b956-a3cf2f4a3e73

[Boken Lin]

@Alexander-Pitzer Oh i see. Were you using a version of the buildroot that did not include uClibc?

[Alexander Pitzer]

Sry I updated my post... so yes uClibc was kicked and uClibc-ng is in but only as broken package

[Boken Lin]

@Alexander-Pitzer Bummer. I guess the only way to do it right now is to check out f14d574f3082577a4489f778d0c8cf7117d33cee commit, and come back to the new one once the broken package has been fixed...

[Alexander Pitzer]

@Boken-Lin I try to compile the new version and will play around with the toolchain a bit. If nothing helps I will go back. Thank's alot for your help. The Onion Omega is a great product and I really like to play around with it alot!

[Boken Lin]

@Alexander-Pitzer I'm glad you like it If there's anything else we can help you with just let us know!