2 optimize : [ O1, O2, O3, Ofast, Os ]
7 csettings : [ "-mcpu=${mcpu}${features}", "-mfloat-abi=${float}", "-mfpu=auto", "-%{optimize}", -gdwarf-2, -ffunction-sections, -fdata-sections ]
8 cwarnings : [ -Wall, -Wextra, -Wshadow, -Wundef, -Wstrict-prototypes, -Wpedantic ]
9 mapinfo : [ "-Xlinker -Map=${builddir}/${targetName}.map" ]
13 cflags : [ "${csettings}", "${cwarnings}", -c, -xc, -std=gnu99 ]
14 asmflags : [ "${csettings}", "${cwarnings}", -c ]
15 linkflags : [ "${csettings}", "${cwarnings}", "${mapinfo}", --specs=nano.specs, --specs=rdimon.specs ]
16 linkscript : "config/core_m/rtebuild.ld"