just a quick one:
in version 4.20500.230714 of the framework-arduinoststm32 the platformio-build.py includes the line: "-Wl,-Map=$BUILD_DIR/firmware.map" which uses the BUILD_DIR path (absolute) without adding quotation marks. Unfortunately, my windows user path includes spaces. I fixed the compiler error (which complained about not being able to find the firmware.map) by just adding quotation marks, OR just commenting out this line entirely (like the github source does).
Also, where can i find the actual source changelog for the platformIO versions, as they differ from the github releases is a few interesting ways (like using "-std=gnu17" and "-std=gnu++17" instead of "-std=gnu11" and "-std=gnu++14")?