most test adapted from "musl-libctest-master" project some taken from newlib Status or libc tests ---NOT TESTED--- no library fns realized qsort strtol time ---HANG--- sscanf >TEST_F(0x1234p56) ---STACK IS SMALL--- strtod_long tstring --other-- fscanf -?scanf ignores width specs, '*' and [chars], cant read %a float -%n counts as parameter snprintf -some format misturbances ungetc -ungetc fails if filepos == 0 - no tricks all file ops limited to 2Gb