-for ac_func in getenv atol sbrk abort atof getcwd getwd strsignal \
+
+for ac_func in getenv atol asprintf sbrk abort atof getcwd getwd strsignal \
strstr errno snprintf vsnprintf vasprintf malloc realloc calloc \
free basename getopt clock getpagesize clearerr_unlocked feof_unlocked ferror_unlocked fflush_unlocked fgetc_unlocked fgets_unlocked fileno_unlocked fprintf_unlocked fputc_unlocked fputs_unlocked fread_unlocked fwrite_unlocked getchar_unlocked getc_unlocked putchar_unlocked putc_unlocked
do