[CMake] find_program usage

[Kyle Edwards]

On Tue, 2019-06-04 at 19:07 +0530, vinay kumar Kotegowder wrote:
> Hi Everyone,
> 
> This is simple code running on Windows machine:
> 
> if(WIN32)
>   message(STATUS "On windows")
>   find_program(_TOOL
>               arm-none-eabi-gcc.exe
>               PATHS "C:"
>             )
> endif()
> 
> message(STATUS "${_TOOL}")
> 
> Result after executing: cmake -P mycmake.cmake
> 
> -- On windows
> -- _TOOL-NOTFOUND
> 
> Can anyone tell me what is wrong with the usage of "find_program"  ?

find_program() is looking in C:, but not its subdirectories. So, unless
arm-none-eabi-gcc.exe is located directly in C:, CMake won't find it.

As a side note, GCC isn't typically found with find_program(). You most
likely want to write a cross-compiling toolchain file which contains
this location instead. See below for details:

https://cmake.org/cmake/help/v3.14/manual/cmake-toolchains.7.html

Kyle