чт, 31 янв. 2019 г. в 10:29, Torsten Robitzki <tors...@robitzki.de>:
> Hi,
> I have a tool-chain file, which requires a variable to be set to the path to 
> the compiler on the local machine:
>   set(CMAKE_C_COMPILER ${ARM_GCC_TOOL_PATH}/bin/arm-none-eabi-gcc)
>   set(CMAKE_CXX_COMPILER ${ARM_GCC_TOOL_PATH}/bin/arm-none-eabi-g++)
> Now I want to give the user an error message, in case that this variable is 
> not set. The „usual“ check for the existence of the variable doesn’t work, 
> because the tool-chain file is included in different context, without access 
> to the cache.
> Any idea?

Just guessing maybe better use $ENV{ARM_GCC_TOOL_PATH} ?

Best Regards,
Sergei Nikulov

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