cross-compiler 8.2.0 doesn't have {sysroot}/usr/include in its header search path about raspberry-pi-cross-compilers

[avilleret]

it is indeed possible to use your Crosscompiler build with CMake (and I thanks you a lot for sharing)
I have to disable the CMake's implicit directory feature by injecting the following lines into my toolchain file

unset(CMAKE_C_IMPLICIT_INCLUDE_DIRECTORIES)
unset(CMAKE_CXX_IMPLICIT_INCLUDE_DIRECTORIES)

I was unsure if its a bug (or a feature) of CMake or if it's a lake of configuration on your side.
Now I'm fixed :-)
Thanks for the quick reply, thanks for the explanation, and thanks again for all this wonderful work.

[abhiTronix]

@avilleret Can share the GCC 8.1.0 link that you tried from archlinux repo?

[avilleret]

it's in AUR repo : https://aur.archlinux.org/packages/arm-linux-gnueabihf-gcc/

[abhiTronix]

@avilleret I thought you're using custom Cross-Compiler similar this repo. ,

The main reason behind this bug/error is that the Official Cross Compiler install files directly to the default system root directory, i.e /usr/ or /usr/local/ and Cmake is made explicitly to work with these paths/configurations only and not with custom paths/configurations, to prevent any broken binding. Therefore any custom Cross-Compiler(like provided here) fails to work in this scenario as its default installation path is /opt/ normally, not the root directory.

So, unfortunately, if you want to use GCC 8.2.0 Cross-Compiler with Cmake on your system, you yourself have compiled & installed it from source to the root directory of your machine.

[abhiTronix]

@avilleret They're working on a fix here(in progress): https://gitlab.kitware.com/cmake/cmake/merge_requests/2716