Check for existence of mremap()
diff --git a/configure.in b/configure.in
index bd1b674..6735b69 100644
--- a/configure.in
+++ b/configure.in
@@ -763,7 +763,8 @@
AC_CHECK_FUNCS(alarm chown clock confstr ctermid ctermid_r dlopen execv \
flock fork fsync fdatasync fpathconf ftime ftruncate \
getgroups getlogin getpeername getpgrp getpid getpwent gettimeofday getwd \
- kill link lstat mkfifo mktime nice pathconf pause plock pthread_init \
+ kill link lstat mkfifo mktime mremap \
+ nice pathconf pause plock pthread_init \
putenv readlink \
select setgid setlocale setuid setsid setpgid setpgrp setvbuf \
sigaction siginterrupt sigrelse strftime strptime symlink sysconf \