# Checks for library functions.
AC_FUNC_VPRINTF
-AC_CHECK_FUNCS([geteuid getuid link memmove memset mkstemp strchr strrchr strtol getopt getopt_long iconv])
+AC_FUNC_MMAP
+AC_CHECK_FUNCS([geteuid getuid link memmove memset mkstemp strchr strrchr strtol getopt getopt_long iconv sysconf ftruncate chsize rand_r])
#
# Checks for FreeType