Wonder the correct usage of stm32-cmake about stm32-cmake

[szechyjs]

You need to set TOOLCHAIN_PREFIX to the location of your downloaded arm-gcc toolchain.

[patrickelectric]

I have the same error.
cmake .. -DTOOLCHAIN_PREFIX=/usr/bin
whereis arm-none-eabi-g++
arm-none-eabi-g++: /usr/bin/arm-none-eabi-g++

[ccpp]

Hi, I don't think this should be closed. There is a usability issue here:

If stm32-cmake does not find the right compiler (e.g., /usr/bin/arm-non-eabi-gcc) then CMake will just continue with the default host compiler (/usr/bin/cc, or MSVC as for @eeyrw) without any error message:

cmake \
        -DCMAKE_TOOLCHAIN_FILE="$BUILDDIR/stm32-cmake/cmake/stm32_gcc.cmake" \
        -DSTM32_TOOLCHAIN_PATH="/usr" \
        -DSTM32_TARGET_TRIPLET="arm-none-eabi" \
        $PROJECT_SOURCE || exit 1
(...)
-- The C compiler identification is GNU 9.3.0
-- The ASM compiler identification is GNU
-- Found assembler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done

I would expect CMake to not find any C compiler instead

[Hish15]

Hi @ccpp,

Do not hesitate to write a new ticket, referencing this one instead.