diff --git a/configure b/configure
index 27c55c7..f8030e6 100755
--- a/configure
+++ b/configure
@@ -23111,7 +23111,7 @@
 LIBS="$MATH_LIBS $LIBS"
 
 
-for ac_func in _exit atexit cimag clock directio execvp fchmod floor fork ftime ftruncate getcwd getpid getexecname getdtablesize getpagesize getrlimit getrusage gettimeofday gmtime_r j0 j1 localtime_r lstat memmove memset mkstemp munmap nanosleep _NSGetExecutablePath pclose _pclose poll popen _popen posix_fadvise posix_fallocate posix_madvise posix_memalign posix_spawnp pow pread pwrite raise rand_r readlink readdir_r realpath select seekdir setlocale sqrt setvbuf stat strchr strerror_r strrchr strcspn strdup strpbrk strspn strstr strtol strtoul symlink sysconf sigemptyset sigaction spawnvp strerror strlcat strlcpy strcasecmp strncasecmp telldir tempnam times usleep utime vsprintf vsnprintf waitpid _wfopen _wstat
+for ac_func in atoll atexit cimag clock ctime_r directio _exit execvp fchmod floor fork ftime ftruncate getc_unlocked getcwd getpid getexecname getdtablesize getpagesize getrlimit getrusage gettimeofday gmtime_r j0 j1 lltostr localtime_r lstat memmove memset mkstemp munmap nanosleep _NSGetExecutablePath pclose _pclose poll popen _popen posix_fadvise posix_fallocate posix_madvise posix_memalign posix_spawnp pow pread pwrite qsort_r raise rand_r readlink readdir_r realpath select seekdir setlocale sqrt setvbuf stat strchr strerror_r strrchr strcspn strdup strpbrk strspn strstr strtol strtoul symlink sysconf sigemptyset sigaction spawnvp strerror strlcat strlcpy strcasecmp strncasecmp telldir tempnam times ulltostr usleep utime vsprintf vsnprintf waitpid _wfopen _wstat
 do :
   as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
 ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
diff --git a/configure.ac b/configure.ac
index 95b9480..121add3 100755
--- a/configure.ac
+++ b/configure.ac
@@ -1004,7 +1004,7 @@
 LIBS="$MATH_LIBS $LIBS"
 AC_SUBST(MATH_LIBS)
 
-AC_CHECK_FUNCS([_exit atexit cimag clock directio execvp fchmod floor fork ftime ftruncate getcwd getpid getexecname getdtablesize getpagesize getrlimit getrusage gettimeofday gmtime_r j0 j1 localtime_r lstat memmove memset mkstemp munmap nanosleep _NSGetExecutablePath pclose _pclose poll popen _popen posix_fadvise posix_fallocate posix_madvise posix_memalign posix_spawnp pow pread pwrite raise rand_r readlink readdir_r realpath select seekdir setlocale sqrt setvbuf stat strchr strerror_r strrchr strcspn strdup strpbrk strspn strstr strtol strtoul symlink sysconf sigemptyset sigaction spawnvp strerror strlcat strlcpy strcasecmp strncasecmp telldir tempnam times usleep utime vsprintf vsnprintf waitpid _wfopen _wstat])
+AC_CHECK_FUNCS([atoll atexit cimag clock ctime_r directio _exit execvp fchmod floor fork ftime ftruncate getc_unlocked getcwd getpid getexecname getdtablesize getpagesize getrlimit getrusage gettimeofday gmtime_r j0 j1 lltostr localtime_r lstat memmove memset mkstemp munmap nanosleep _NSGetExecutablePath pclose _pclose poll popen _popen posix_fadvise posix_fallocate posix_madvise posix_memalign posix_spawnp pow pread pwrite qsort_r raise rand_r readlink readdir_r realpath select seekdir setlocale sqrt setvbuf stat strchr strerror_r strrchr strcspn strdup strpbrk strspn strstr strtol strtoul symlink sysconf sigemptyset sigaction spawnvp strerror strlcat strlcpy strcasecmp strncasecmp telldir tempnam times ulltostr usleep utime vsprintf vsnprintf waitpid _wfopen _wstat])
 
 #
 # Check for clock_gettime().