How to partially disabling cmake C/C++ custom compiler checking -

i trying crosscompilation using cmake. easy examples on internet, managed crosscompile library on linux (x86 , arm), windows , android. on custom platform.

the process need achieve:

1. sourcing environment (this destroy previous bash classic environment)
2. compile cmake
3. execute want

but cmake testing symbols in custom c/c++ libraries make library unable compile. errors have cmake versions of glibcxx , cxxabi (no c issues) not of them.

is there way make cmake ok ?

edit:

i tried using:

set(cmake_c_compiler_works true) set(cmake_cxx_compiler_works true) 

and with:

include(cmakeforcecompiler) ... cmake_force_c_compiler(${env_path}/bin/${cc}) cmake_force_cxx_compiler(${env_path}/bin/${cxx}) 

but cmake still checking symbols.

without having environment nor error message it's not easy tell actual root cause here 2 of common causes , respective fixes:

1. if don't have complete toolchain file created custom environment - cmake can't link simple test program - can try relatively new (version 3.6) global cmake variable named cmake_try_compile_target_type.

   so add following:

   set(cmake_try_compile_target_type static_library) 

   then cmake try build static library.

2. to have common gcc compiler variables set , have basic checks, try:

   set(cmake_system_name generic) 

   see cmake cross compiling: setting system , toolchain:

   if target embedded system without os set cmake_system_name "generic"

references

• cmake amrcc + custom linker
• cmake cross-compile specific linker doesn't pass arguments armlink