patch 8.0.0109
Problem:    Still checking if memcmp() exists while every system should have
            it now.
Solution:   Remove vim_memcmp().  (James McCoy, closes #1295)
diff --git a/src/configure.ac b/src/configure.ac
index f6a4469..3a31f97 100644
--- a/src/configure.ac
+++ b/src/configure.ac
@@ -3594,8 +3594,8 @@
 
 dnl Check for functions in one big call, to reduce the size of configure.
 dnl Can only be used for functions that do not require any include.
-AC_CHECK_FUNCS(bcmp fchdir fchown fsync getcwd getpseudotty \
-	getpwent getpwnam getpwuid getrlimit gettimeofday getwd lstat memcmp \
+AC_CHECK_FUNCS(fchdir fchown fsync getcwd getpseudotty \
+	getpwent getpwnam getpwuid getrlimit gettimeofday getwd lstat \
 	memset mkdtemp nanosleep opendir putenv qsort readlink select setenv \
 	setpgid setsid sigaltstack sigstack sigset sigsetjmp sigaction \
 	sigprocmask sigvec strcasecmp strerror strftime stricmp strncasecmp \