diff --git a/config.mak.in b/config.mak.in
index 776b80565902af3de1c2a33af062dd4de719a267..11d256e9cf5b51154a3bf0084f9e3bcea5702352 100644
--- a/config.mak.in
+++ b/config.mak.in
@@ -35,7 +35,10 @@ NO_SOCKADDR_STORAGE=@NO_SOCKADDR_STORAGE@
 NO_IPV6=@NO_IPV6@
 NO_C99_FORMAT=@NO_C99_FORMAT@
 NO_STRCASESTR=@NO_STRCASESTR@
+NO_MEMMEM=@NO_MEMMEM@
 NO_STRLCPY=@NO_STRLCPY@
+NO_STRTOUMAX=@NO_STRTOUMAX@
 NO_SETENV=@NO_SETENV@
+NO_MKDTEMP=@NO_MKDTEMP@
 NO_ICONV=@NO_ICONV@
 NO_DEFLATE_BOUND=@NO_DEFLATE_BOUND@
diff --git a/configure.ac b/configure.ac
index 53e9a17c737e10a51b8b33b9cf258744817e6e9a..7bcf1a488c05280b4ae1f8aad43b82ba33e2ea94 100644
--- a/configure.ac
+++ b/configure.ac
@@ -289,18 +289,36 @@ AC_CHECK_FUNC(strcasestr,
 [NO_STRCASESTR=YesPlease])
 AC_SUBST(NO_STRCASESTR)
 #
+# Define NO_MEMMEM if you don't have memmem.
+AC_CHECK_FUNC(memmem,
+[NO_MEMMEM=],
+[NO_MEMMEM=YesPlease])
+AC_SUBST(NO_MEMMEM)
+#
 # Define NO_STRLCPY if you don't have strlcpy.
 AC_CHECK_FUNC(strlcpy,
 [NO_STRLCPY=],
 [NO_STRLCPY=YesPlease])
 AC_SUBST(NO_STRLCPY)
 #
+# Define NO_STRTOUMAX if you don't have strtoumax in the C library.
+AC_CHECK_FUNC(strtoumax,
+[NO_STRTOUMAX=],
+[NO_STRTOUMAX=YesPlease])
+AC_SUBST(NO_STRTOUMAX)
+#
 # Define NO_SETENV if you don't have setenv in the C library.
 AC_CHECK_FUNC(setenv,
 [NO_SETENV=],
 [NO_SETENV=YesPlease])
 AC_SUBST(NO_SETENV)
 #
+# Define NO_MKDTEMP if you don't have mkdtemp in the C library.
+AC_CHECK_FUNC(mkdtemp,
+[NO_MKDTEMP=],
+[NO_MKDTEMP=YesPlease])
+AC_SUBST(NO_MKDTEMP)
+#
 # Define NO_MMAP if you want to avoid mmap.
 #
 # Define NO_ICONV if your libc does not properly support iconv.