No, you are not missing anything. Studio adds one extra parameter to profile when building from UI. Unfortunately, Mbed OS build tools detects even the smallest change in profile and insist on compiling a program from a clean state. We will look at what we can do about it. The added argument does not affect the created program binary.
@arekzaluski
Is there a way using GCC ARM in Mbed Studio to enable parallel make such as make -j6?
I’m building on Windows and I recently switched from ARM6 compiler to GCC for debugging purposes and the build process is MUCH slower. And it seems like only one compilation unit is being compiled at a time.