diff --git a/ConfigureChecks.cmake b/ConfigureChecks.cmake
index 918a62803d..cfa63150ea 100644
--- a/ConfigureChecks.cmake
+++ b/ConfigureChecks.cmake
@@ -31,7 +31,6 @@ check_include_file("dlfcn.h"             HAVE_DLFCN_H)
 check_include_file("fcntl.h"             HAVE_FCNTL_H)
 check_include_file("getopt.h"            HAVE_GETOPT_H)
 check_include_file("grp.h"               HAVE_GRP_H)
-check_include_file("inet/aton.h"         HAVE_INET_ATON_H)
 check_include_file("inttypes.h"          HAVE_INTTYPES_H)
 check_include_file("memory.h"            HAVE_MEMORY_H)
 check_include_file("netinet/in.h"        HAVE_NETINET_IN_H)
@@ -83,6 +82,7 @@ cmake_pop_check_state()
 check_function_exists("gethostbyname2"   HAVE_GETHOSTBYNAME2)
 check_function_exists("getopt"           HAVE_GETOPT)
 check_function_exists("getprotobynumber" HAVE_GETPROTOBYNUMBER)
+check_function_exists("inet_aton"        HAVE_INET_ATON)
 check_function_exists("inet_ntop"        HAVE_INET_NTOP_PROTO)
 check_function_exists("issetugid"        HAVE_ISSETUGID)
 check_function_exists("mmap"             HAVE_MMAP)
@@ -91,6 +91,18 @@ check_function_exists("mkdtemp"          HAVE_MKDTEMP)
 check_function_exists("mkstemp"          HAVE_MKSTEMP)
 check_function_exists("setresgid"        HAVE_SETRESGID)
 check_function_exists("setresuid"        HAVE_SETRESUID)
+
+#
+# Windows doesn't have strncasecmp, but does have stricmp, which has
+# the same signature and behavior.  We #define strncasecmp to stricmp
+# on Windows.
+#
+if(WIN32)
+    check_function_exists("stricmp"          HAVE_STRNCASECMP)
+else()
+    check_function_exists("strncasecmp"      HAVE_STRNCASECMP)
+endif()
+check_function_exists("strptime"         HAVE_STRPTIME)
 check_function_exists("sysconf"          HAVE_SYSCONF)
 
 #Struct members
diff --git a/config.h.win32 b/config.h.win32
index 2db0fed132..b19b7dc7b6 100644
--- a/config.h.win32
+++ b/config.h.win32
@@ -216,9 +216,14 @@
 /* Define to have ntddndis.h */
 @HAVE_NTDDNDIS_H@
 
-/* #undef HAVE_INET_ATON_H */
+/* Define to 1 if you have the strncasecmp function. */
+/* Actually, we don't, but we have strnicmp, and #define strncasecmp to strnicmp below */
+#define HAVE_STRNCASECMP 1
+
+/* Define if you have the strptime function. */
+/* #undef HAVE_STRPTIME 1 */
+
 #define NEED_INET_V6DEFS_H  1
-#define NEED_STRPTIME_H     1
 
 #ifndef WIN32
 #define WIN32			1
diff --git a/configure.ac b/configure.ac
index 13347884f6..13c1de5f94 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2530,38 +2530,30 @@ AC_C_BIGENDIAN
 # XXX - do we need this?
 AC_PROG_GCC_TRADITIONAL
 
-GETOPT_LO=""
 AC_CHECK_FUNC(getopt,
-  [GETOPT_LO=""
-   AC_DEFINE(HAVE_GETOPT, 1, [Define to 1 if you have the getopt function.])
+  [
+    GETOPT_LO=""
+    AC_DEFINE(HAVE_GETOPT, 1, [Define to 1 if you have the getopt function.])
   ],
-  GETOPT_LO="wsgetopt.lo"
-)
-if test "$ac_cv_func_getopt" = no ; then
-  GETOPT_LO="wsgetopt.lo"
-fi
-AM_CONDITIONAL(NEED_GETOPT_LO, test "x$ac_cv_func_getopt" = "xno")
+  GETOPT_LO="wsgetopt.lo")
 AC_SUBST(GETOPT_LO)
 
-AC_CHECK_FUNC(strncasecmp, STRNCASECMP_LO="",
+AC_CHECK_FUNC(strncasecmp,
+  [
+    STRNCASECMP_LO=""
+    AC_DEFINE(HAVE_STRNCASECMP, 1, [Define to 1 if you have the strncasecmp function.])
+  ],
   STRNCASECMP_LO="strncasecmp.lo")
-if test "$ac_cv_func_strncasecmp" = no ; then
-  STRNCASECMP_LO="strncasecmp.lo"
-fi
-AM_CONDITIONAL(NEED_STRNCASECMP_LO, test "x$ac_cv_func_strncasecmp" = "xno")
 AC_SUBST(STRNCASECMP_LO)
 
 AC_CHECK_FUNCS(mkstemp mkdtemp)
 
-AC_SEARCH_LIBS(inet_aton, [socket nsl], have_inet_aton=yes,
-    have_inet_aton=no)
-if test "$have_inet_aton" = no; then
-  INET_ATON_LO="inet_aton.lo"
-  AC_DEFINE(HAVE_INET_ATON_H, 0, [Define unless inet/aton.h needs to be included])
-else
-  INET_ATON_LO=""
-fi
-AM_CONDITIONAL(NEED_INET_ATON_LO, test "x$have_inet_aton" = "xno")
+AC_SEARCH_LIBS(inet_aton, [socket nsl],
+  [
+    INET_ATON_LO=""
+    AC_DEFINE(HAVE_INET_ATON, 0, [Define to 1 if you have the inet_aton function.])
+  ],
+  INET_ATON_LO="inet_aton.lo")
 AC_SUBST(INET_ATON_LO)
 
 AC_SEARCH_LIBS(inet_pton, [socket nsl], [
@@ -2623,15 +2615,12 @@ extern const char *inet_ntop(int, const void *, char *, socklen_t);],, [
 AM_CONDITIONAL(NEED_INET_NTOP_LO, test "x$INET_NTOP_LO" != "x")
 AC_SUBST(INET_NTOP_LO)
 
-AC_CHECK_FUNC(strptime, STRPTIME_LO="",
-  [STRPTIME_LO="strptime.lo"
-   AC_DEFINE(NEED_STRPTIME_H, 1, [Define if strptime.h needs to be included])
-])
-if test "$ac_cv_func_strptime" = no ; then
-  STRPTIME_LO="strptime.lo"
-fi
-AC_SUBST(STRPTIME_C)
-AM_CONDITIONAL(NEED_STRPTIME_LO, test "x$ac_cv_func_strptime" = "no")
+AC_CHECK_FUNC(strptime,
+  [
+    STRPTIME_LO=""
+    AC_DEFINE(HAVE_STRPTIME, 1, [Define if you have the strptime function.])
+  ],
+  STRPTIME_LO="strptime.lo")
 AC_SUBST(STRPTIME_LO)
 
 AC_CHECK_FUNCS(getprotobynumber gethostbyname2)
diff --git a/editcap.c b/editcap.c
index 4432d41984..a6d4720e3c 100644
--- a/editcap.c
+++ b/editcap.c
@@ -77,7 +77,7 @@
 #endif
 #endif
 
-#ifdef NEED_STRPTIME_H
+#ifndef HAVE_STRPTIME
 # include "wsutil/strptime.h"
 #endif
 
diff --git a/epan/addr_resolv.c b/epan/addr_resolv.c
index fbfc7295de..7e1420976c 100644
--- a/epan/addr_resolv.c
+++ b/epan/addr_resolv.c
@@ -85,7 +85,7 @@
 #include <winsock2.h>       /* needed to define AF_ values on Windows */
 #endif
 
-#ifndef HAVE_INET_ATON_H
+#ifndef HAVE_INET_ATON
 # include "wsutil/inet_aton.h"
 #endif
 
diff --git a/epan/dissectors/packet-dcom.c b/epan/dissectors/packet-dcom.c
index d26b407f96..c185ce4d0d 100644
--- a/epan/dissectors/packet-dcom.c
+++ b/epan/dissectors/packet-dcom.c
@@ -81,7 +81,9 @@
 #include <epan/exceptions.h>
 #include <epan/wmem/wmem.h>
 #include <epan/addr_resolv.h>
+#ifndef HAVE_INET_ATON
 #include <wsutil/inet_aton.h>
+#endif
 #include <epan/expert.h>
 #include <epan/prefs.h>
 #include <ctype.h>
diff --git a/epan/dissectors/packet-lbmr.c b/epan/dissectors/packet-lbmr.c
index f891bcc236..8e95b68bc9 100644
--- a/epan/dissectors/packet-lbmr.c
+++ b/epan/dissectors/packet-lbmr.c
@@ -41,7 +41,9 @@
 #include <epan/value_string.h>
 #include <epan/wmem/wmem.h>
 #include <epan/to_str.h>
-#include <wsutil/inet_aton.h>
+#ifndef HAVE_INET_ATON
+    #include <wsutil/inet_aton.h>
+#endif
 #include <wsutil/pint.h>
 #include "packet-lbm.h"
 #include "packet-lbtru.h"
diff --git a/epan/dissectors/packet-lbtrm.c b/epan/dissectors/packet-lbtrm.c
index 4fa8b42820..c7165aa59f 100644
--- a/epan/dissectors/packet-lbtrm.c
+++ b/epan/dissectors/packet-lbtrm.c
@@ -38,7 +38,9 @@
 #include <epan/tap.h>
 #include <epan/conversation.h>
 #include <epan/to_str.h>
-#include <wsutil/inet_aton.h>
+#ifndef HAVE_INET_ATON
+    #include <wsutil/inet_aton.h>
+#endif
 #include <wsutil/pint.h>
 #include "packet-lbm.h"
 #include "packet-lbtrm.h"
diff --git a/epan/ftypes/ftype-time.c b/epan/ftypes/ftype-time.c
index 8b3471956f..1bbf793169 100644
--- a/epan/ftypes/ftype-time.c
+++ b/epan/ftypes/ftype-time.c
@@ -39,7 +39,7 @@
 #include <ftypes-int.h>
 #include <epan/to_str.h>
 
-#ifdef NEED_STRPTIME_H
+#ifndef HAVE_STRPTIME
 #include "wsutil/strptime.h"
 #endif
 
diff --git a/epan/tvbuff.c b/epan/tvbuff.c
index 1ad77b7cf9..11fe105cdf 100644
--- a/epan/tvbuff.c
+++ b/epan/tvbuff.c
@@ -59,7 +59,7 @@
  * yet defined.
  */
 #include <time.h>
-/*#ifdef NEED_STRPTIME_H*/
+/*#ifndef HAVE_STRPTIME*/
 #ifndef strptime
 #include "wsutil/strptime.h"
 #endif
diff --git a/text2pcap.c b/text2pcap.c
index e308ffc3ea..d5ba3e718d 100644
--- a/text2pcap.c
+++ b/text2pcap.c
@@ -139,7 +139,7 @@
 #include "wsutil/wsgetopt.h"
 #endif
 
-#ifdef NEED_STRPTIME_H
+#ifndef HAVE_STRPTIME
 # include "wsutil/strptime.h"
 #endif
 
@@ -159,7 +159,7 @@
 #include <winsock2.h>       /* needed to define AF_ values on Windows */
 #endif
 
-#ifndef HAVE_INET_ATON_H
+#ifndef HAVE_INET_ATON
 # include "wsutil/inet_aton.h"
 #endif
 
diff --git a/ui/text_import.c b/ui/text_import.c
index 374b5af283..7b40c49a50 100644
--- a/ui/text_import.c
+++ b/ui/text_import.c
@@ -125,7 +125,7 @@
 #include <wsutil/crc32.h>
 #include <epan/in_cksum.h>
 
-#ifdef NEED_STRPTIME_H
+#ifndef HAVE_STRPTIME
 # include "wsutil/strptime.h"
 #endif
 
diff --git a/wsutil/Makefile.am b/wsutil/Makefile.am
index 385acc6e73..c2e0c22186 100644
--- a/wsutil/Makefile.am
+++ b/wsutil/Makefile.am
@@ -25,32 +25,14 @@ DIST_SUBDIRS = $(SUBDIRS)
 ACLOCAL_AMFLAGS = `../aclocal-flags`
 
 # Optional objects that I know how to build. These will be
-# linked into libwsutil.
-wsutil_optional_objects =
-
-if NEED_GETOPT_LO
-wsutil_optional_objects += @GETOPT_LO@
-endif
-
-if NEED_INET_ATON_LO
-wsutil_optional_objects += @INET_ATON_LO@
-endif
-
-if NEED_INET_NTOP_LO
-wsutil_optional_objects += @INET_NTOP_LO@
-endif
-
-if NEED_INET_PTON_LO
-wsutil_optional_objects += @INET_PTON_LO@
-endif
-
-if NEED_STRNCASECMP_LO
-wsutil_optional_objects += @STRNCASECMP_LO@
-endif
-
-if NEED_STRPTIME_LO
-wsutil_optional_objects += @STRPTIME_LO@
-endif
+# linked into libwsutil if necessary.
+wsutil_optional_objects = \
+	@GETOPT_LO@		\
+	@INET_ATON_LO@		\
+	@INET_NTOP_LO@		\
+	@INET_PTON_LO@		\
+	@STRNCASECMP_LO@	\
+	@STRPTIME_LO@
 
 if SSE42_SUPPORTED
 wsutil_optional_objects += libwsutil_sse42.la
@@ -92,6 +74,7 @@ EXTRA_libwsutil_la_SOURCES=	\
 	inet_pton.c		\
 	inet_v6defs.h		\
 	strncasecmp.c		\
+	strncasecmp.h		\
 	strptime.c		\
 	strptime.h		\
 	wsgetopt.c		\
diff --git a/wsutil/strncasecmp.c b/wsutil/strncasecmp.c
index da8b862482..57953b9f04 100644
--- a/wsutil/strncasecmp.c
+++ b/wsutil/strncasecmp.c
@@ -21,6 +21,8 @@
 #include <string.h>
 #include <ctype.h>
 
+#include "wsutil/strncasecmp.h"
+
 /* Compare no more than N characters of S1 and S2,
    ignoring case, returning less than, equal to or
    greater than zero if S1 is lexicographically less
diff --git a/wsutil/strncasecmp.h b/wsutil/strncasecmp.h
new file mode 100644
index 0000000000..bfc3b63561
--- /dev/null
+++ b/wsutil/strncasecmp.h
@@ -0,0 +1,32 @@
+/* strncasecmp.h
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef __STRNCASECMP_H__
+#define __STRNCASECMP_H__
+
+#include "ws_symbol_export.h"
+
+/*
+ * Version of "strncasecmp()", for the benefit of OSes that don't have it.
+ */
+WS_DLL_PUBLIC int strncasecmp (const char *, const char *, size_t);
+
+#endif
diff --git a/wsutil/strptime.c b/wsutil/strptime.c
index d6603a9d53..7a8fe2a13e 100644
--- a/wsutil/strptime.c
+++ b/wsutil/strptime.c
@@ -31,6 +31,10 @@
 #include <string.h>
 #include <time.h>
 
+#ifndef HAVE_STRNCASECMP
+#include "wsutil/strncasecmp.h"
+#endif
+
 #ifdef _LIBC
 # include "../locale/localeinfo.h"
 #endif