Had tried to build it from the IDE before. Couldn't do it.
Tried to build manually, got exactly the same error I was getting in the IDE.
Parsing C:/Users/mario.raposo/zephyrproject/zephyr/Kconfig
Loaded configuration 'C:/Users/mario.raposo/zephyrproject/zephyr/build/zephyr/.config'
No change to configuration in 'C:/Users/mario.raposo/zephyrproject/zephyr/build/zephyr/.config'
No change to Kconfig header in 'C:/Users/mario.raposo/zephyrproject/zephyr/build/zephyr/include/generated/autoconf.h'
CMake Error at ../../../cmake/extensions.cmake:1557 (message):
Assertion failed: The toolchain is unable to build a dummy C file. See
CMakeError.log.
Call Stack (most recent call first):
../../../CMakeLists.txt:42 (assert)
-- Configuring incomplete, errors occurred!
See also "C:/Users/mario.raposo/zephyrproject/zephyr/build/CMakeFiles/CMakeOutput.log".
See also "C:/Users/mario.raposo/zephyrproject/zephyr/build/CMakeFiles/CMakeError.log".

