mbed-os/tools/profiles/save-asm.json

{
    "GCC_ARM": {
        "common": ["-save-temps"],
        "asm": [],
        "c": [],
        "cxx": [],
        "ld": []
    },
    "ARM": {
        "common": ["--asm", "--interleave"],
        "asm": [],
        "c": [],
        "cxx": [],
        "ld": []
    },
    "uARM": {
        "common": ["--asm", "--interleave"],
        "asm": [],
        "c": [],
        "cxx": [],
        "ld": []
    }
}