diff --git a/lib/isc/assertions.c b/lib/isc/assertions.c
index 6a00a0d9fc..63a2a5ce79 100644
--- a/lib/isc/assertions.c
+++ b/lib/isc/assertions.c
@@ -15,7 +15,7 @@
  * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-/* $Id: assertions.c,v 1.14 2001/01/09 21:55:53 bwelling Exp $ */
+/* $Id: assertions.c,v 1.15 2001/07/12 05:58:17 mayer Exp $ */
 
 #include <config.h>
 
@@ -36,7 +36,7 @@ default_callback(const char *, int, isc_assertiontype_t, const char *);
  * Public.
  */
 
-isc_assertioncallback_t isc_assertion_failed = default_callback;
+LIBISC_EXTERNAL_DATA isc_assertioncallback_t isc_assertion_failed = default_callback;
 
 void
 isc_assertion_setcallback(isc_assertioncallback_t cb) {
diff --git a/lib/isc/commandline.c b/lib/isc/commandline.c
index a2e4cff874..5120140663 100644
--- a/lib/isc/commandline.c
+++ b/lib/isc/commandline.c
@@ -48,7 +48,7 @@
  * SUCH DAMAGE.
  */
 
-/* $Id: commandline.c,v 1.13 2001/03/01 22:40:09 bwelling Exp $ */
+/* $Id: commandline.c,v 1.14 2001/07/12 05:58:18 mayer Exp $ */
 
 /*
  * This file was adapted from the NetBSD project's source tree, RCS ID:
@@ -72,14 +72,14 @@
 #include <isc/string.h>
 #include <isc/util.h>
 
-int isc_commandline_index = 1;		/* Index into parent argv vector. */
-int isc_commandline_option;		/* Character checked for validity. */
+LIBISC_EXTERNAL_DATA int isc_commandline_index = 1;		/* Index into parent argv vector. */
+LIBISC_EXTERNAL_DATA int isc_commandline_option;		/* Character checked for validity. */
 
-char *isc_commandline_argument;		/* Argument associated with option. */
-char *isc_commandline_progname;		/* For printing error messages. */
+LIBISC_EXTERNAL_DATA char *isc_commandline_argument;		/* Argument associated with option. */
+LIBISC_EXTERNAL_DATA char *isc_commandline_progname;		/* For printing error messages. */
 
-isc_boolean_t isc_commandline_errprint = ISC_TRUE; /* Print error messages. */
-isc_boolean_t isc_commandline_reset = ISC_TRUE; /* Reset processing. */
+LIBISC_EXTERNAL_DATA isc_boolean_t isc_commandline_errprint = ISC_TRUE; /* Print error messages. */
+LIBISC_EXTERNAL_DATA isc_boolean_t isc_commandline_reset = ISC_TRUE; /* Reset processing. */
 
 static char endopt = '\0';
 
diff --git a/lib/isc/include/isc/assertions.h b/lib/isc/include/isc/assertions.h
index 1c808373c3..45855c6631 100644
--- a/lib/isc/include/isc/assertions.h
+++ b/lib/isc/include/isc/assertions.h
@@ -16,13 +16,14 @@
  */
 
 /*
- * $Id: assertions.h,v 1.16 2001/03/05 18:47:00 mayer Exp $
+ * $Id: assertions.h,v 1.17 2001/07/12 05:58:21 mayer Exp $
  */
 
 #ifndef ISC_ASSERTIONS_H
 #define ISC_ASSERTIONS_H 1
 
 #include <isc/lang.h>
+#include <isc/platform.h>
 
 ISC_LANG_BEGINDECLS
 
@@ -36,7 +37,7 @@ typedef enum {
 typedef void (*isc_assertioncallback_t)(const char *, int, isc_assertiontype_t,
 					const char *);
 
-extern isc_assertioncallback_t isc_assertion_failed;
+LIBISC_EXTERNAL_DATA extern isc_assertioncallback_t isc_assertion_failed;
 
 void
 isc_assertion_setcallback(isc_assertioncallback_t);
diff --git a/lib/isc/include/isc/commandline.h b/lib/isc/include/isc/commandline.h
index 085139e94c..563063b227 100644
--- a/lib/isc/include/isc/commandline.h
+++ b/lib/isc/include/isc/commandline.h
@@ -15,22 +15,24 @@
  * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-/* $Id: commandline.h,v 1.7 2001/01/09 21:56:49 bwelling Exp $ */
+/* $Id: commandline.h,v 1.8 2001/07/12 05:58:22 mayer Exp $ */
 
 #ifndef ISC_COMMANDLINE_H
 #define ISC_COMMANDLINE_H 1
 
 #include <isc/boolean.h>
 #include <isc/lang.h>
+#include <isc/platform.h>
 
-extern int isc_commandline_index;	/* Index into parent argv vector. */
-extern int isc_commandline_option;	/* Character checked for validity. */
 
-extern char *isc_commandline_argument;	/* Argument associated with option. */
-extern char *isc_commandline_progname;	/* For printing error messages. */
+LIBISC_EXTERNAL_DATA extern int isc_commandline_index;	/* Index into parent argv vector. */
+LIBISC_EXTERNAL_DATA extern int isc_commandline_option;	/* Character checked for validity. */
 
-extern isc_boolean_t isc_commandline_errprint;	/* Print error message. */
-extern isc_boolean_t isc_commandline_reset;    	/* Reset getopt. */
+LIBISC_EXTERNAL_DATA extern char *isc_commandline_argument;	/* Argument associated with option. */
+LIBISC_EXTERNAL_DATA extern char *isc_commandline_progname;	/* For printing error messages. */
+
+LIBISC_EXTERNAL_DATA extern isc_boolean_t isc_commandline_errprint;	/* Print error message. */
+LIBISC_EXTERNAL_DATA extern isc_boolean_t isc_commandline_reset;    	/* Reset getopt. */
 
 ISC_LANG_BEGINDECLS
 
diff --git a/lib/isc/include/isc/log.h b/lib/isc/include/isc/log.h
index 1880e2867e..dfbb4e2bff 100644
--- a/lib/isc/include/isc/log.h
+++ b/lib/isc/include/isc/log.h
@@ -15,7 +15,7 @@
  * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-/* $Id: log.h,v 1.38 2001/03/05 12:34:02 tale Exp $ */
+/* $Id: log.h,v 1.39 2001/07/12 05:58:23 mayer Exp $ */
 
 #ifndef ISC_LOG_H
 #define ISC_LOG_H 1
@@ -26,6 +26,7 @@
 
 #include <isc/formatcheck.h>
 #include <isc/lang.h>
+#include <isc/platform.h>
 #include <isc/types.h>
 
 /*
@@ -126,9 +127,9 @@ typedef union isc_logdestination {
  * definitions with indexes into its isc_logcategory structure corresponding to
  * the order of the names.
  */
-extern isc_logcategory_t isc_categories[];
-extern isc_log_t *isc_lctx;
-extern isc_logmodule_t isc_modules[];
+LIBISC_EXTERNAL_DATA extern isc_logcategory_t isc_categories[];
+LIBISC_EXTERNAL_DATA extern isc_log_t *isc_lctx;
+LIBISC_EXTERNAL_DATA extern isc_logmodule_t isc_modules[];
 
 /*
  * Do not log directly to DEFAULT.  Use another category.  When in doubt,
diff --git a/lib/isc/include/isc/mem.h b/lib/isc/include/isc/mem.h
index cda2f198f8..8dfce43392 100644
--- a/lib/isc/include/isc/mem.h
+++ b/lib/isc/include/isc/mem.h
@@ -15,7 +15,7 @@
  * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-/* $Id: mem.h,v 1.53 2001/06/27 23:29:29 marka Exp $ */
+/* $Id: mem.h,v 1.54 2001/07/12 05:58:25 mayer Exp $ */
 
 #ifndef ISC_MEM_H
 #define ISC_MEM_H 1
@@ -24,6 +24,7 @@
 
 #include <isc/lang.h>
 #include <isc/mutex.h>
+#include <isc/platform.h>
 #include <isc/types.h>
 
 ISC_LANG_BEGINDECLS
@@ -86,7 +87,7 @@ typedef void (*isc_memfree_t)(void *, void *);
  *	if a hi_water mark is set print the maximium inuse memory every
  *	time it is raised once it exceeds the hi_water mark
  */
-extern unsigned int isc_mem_debugging;
+LIBISC_EXTERNAL_DATA extern unsigned int isc_mem_debugging;
 #define ISC_MEM_DEBUGTRACE		0x00000001U
 #define ISC_MEM_DEBUGRECORD		0x00000002U
 #define ISC_MEM_DEBUGUSAGE		0x00000004U
diff --git a/lib/isc/log.c b/lib/isc/log.c
index ddd64fda06..3110bca2db 100644
--- a/lib/isc/log.c
+++ b/lib/isc/log.c
@@ -15,7 +15,7 @@
  * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-/* $Id: log.c,v 1.68 2001/06/27 04:37:11 mayer Exp $ */
+/* $Id: log.c,v 1.69 2001/07/12 05:58:19 mayer Exp $ */
 
 /* Principal Authors: DCL */
 
@@ -185,7 +185,7 @@ static const int syslog_map[] = {
  * be overridden.  Since the default is always looked up as the first
  * channellist in the log context, it must come first in isc_categories[].
  */
-isc_logcategory_t isc_categories[] = {
+LIBISC_EXTERNAL_DATA isc_logcategory_t isc_categories[] = {
 	{ "default", 0 },	/* "default" must come first. */
 	{ "general", 0 },
 	{ NULL, 0 }
@@ -194,7 +194,7 @@ isc_logcategory_t isc_categories[] = {
 /*
  * See above comment for categories, and apply it to modules.
  */
-isc_logmodule_t isc_modules[] = {
+LIBISC_EXTERNAL_DATA isc_logmodule_t isc_modules[] = {
 	{ "socket", 0 },
 	{ "time", 0 },
 	{ NULL, 0 }
@@ -210,7 +210,7 @@ static isc_logchannellist_t default_channel;
 /*
  * libisc logs to this context.
  */
-isc_log_t *isc_lctx = NULL;
+LIBISC_EXTERNAL_DATA isc_log_t *isc_lctx = NULL;
 
 /*
  * Forward declarations.
diff --git a/lib/isc/mem.c b/lib/isc/mem.c
index e5bb13c54a..9eb6184d9d 100644
--- a/lib/isc/mem.c
+++ b/lib/isc/mem.c
@@ -15,7 +15,7 @@
  * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-/* $Id: mem.c,v 1.96 2001/06/28 01:57:34 marka Exp $ */
+/* $Id: mem.c,v 1.97 2001/07/12 05:58:20 mayer Exp $ */
 
 #include <config.h>
 
@@ -37,7 +37,7 @@
 #ifndef ISC_MEM_DEBUGGING
 #define ISC_MEM_DEBUGGING 0
 #endif
-unsigned int isc_mem_debugging = ISC_MEM_DEBUGGING;
+LIBISC_EXTERNAL_DATA unsigned int isc_mem_debugging = ISC_MEM_DEBUGGING;
 
 /*
  * Define ISC_MEM_USE_INTERNAL_MALLOC=1 to use the internal malloc()
diff --git a/lib/isc/win32/file.c b/lib/isc/win32/file.c
index 6219aee546..36a13899e9 100644
--- a/lib/isc/win32/file.c
+++ b/lib/isc/win32/file.c
@@ -15,7 +15,7 @@
  * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-/* $Id: file.c,v 1.14 2001/07/11 04:32:15 mayer Exp $ */
+/* $Id: file.c,v 1.15 2001/07/12 05:58:26 mayer Exp $ */
 
 #include <config.h>
 
@@ -384,13 +384,15 @@ isc_boolean_t
 isc_file_isabsolute(const char *filename) {
 	REQUIRE(filename != NULL);
 	/*
-	 * Look for c:\path\... style or \\computer\shar\path...
+	 * Look for c:\path\... style, c:/path/... or \\computer\shar\path...
 	 * the UNC style file specs
 	 */
 	if ((filename[0] == '\\') && (filename[1] == '\\'))
 		return (ISC_TRUE);
 	if (isalpha(filename[0]) != 0 && filename[1] == ':' && filename[2] == '\\')
 		return (ISC_TRUE);
+	if (isalpha(filename[0]) != 0 && filename[1] == ':' && filename[2] == '/')
+		return (ISC_TRUE);
 	return (ISC_FALSE);
 }
 
diff --git a/lib/isc/win32/include/isc/platform.h b/lib/isc/win32/include/isc/platform.h
index 205c43b9d9..82d7a11ec4 100644
--- a/lib/isc/win32/include/isc/platform.h
+++ b/lib/isc/win32/include/isc/platform.h
@@ -15,7 +15,7 @@
  * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-/* $Id: platform.h,v 1.3 2001/07/09 21:06:29 gson Exp $ */
+/* $Id: platform.h,v 1.4 2001/07/12 05:58:28 mayer Exp $ */
 
 #ifndef ISC_PLATFORM_H
 #define ISC_PLATFORM_H 1
@@ -41,4 +41,43 @@
 
 #define ISC_PLATFORM_NEEDSTRSEP
 
+/*
+ * Used to control how extern data is linked; needed for Win32 platforms.
+ */
+#define ISC_PLATFORM_USEDECLSPEC 1
+
+/*
+ * Set up a macro for importing and exporting from the DLL
+ */
+
+#ifdef LIBISC_EXPORTS
+#define LIBISC_EXTERNAL_DATA __declspec( dllexport )
+#else
+#define LIBISC_EXTERNAL_DATA __declspec( dllimport ) 
+#endif
+
+#ifdef LIBISCCFG_EXPORTS
+#define LIBISCCFG_EXTERNAL_DATA __declspec( dllexport )
+#else
+#define LIBISCCFG_EXTERNAL_DATA __declspec( dllimport ) 
+#endif
+
+#ifdef LIBISCCC_EXPORTS
+#define LIBISCCC_EXTERNAL_DATA __declspec( dllexport )
+#else
+#define LIBISCCC_EXTERNAL_DATA __declspec( dllimport ) 
+#endif
+
+#ifdef LIBDNS_EXPORTS
+#define LIBDNS_EXTERNAL_DATA __declspec( dllexport )
+#else
+#define LIBDNS_EXTERNAL_DATA __declspec( dllimport )
+#endif
+
+#ifdef LIBLWRES_EXPORTS
+#define LIBLWRES_EXTERNAL_DATA __declspec( dllexport )
+#else
+#define LIBLWRES_EXTERNAL_DATA __declspec( dllimport )
+#endif
+
 #endif /* ISC_PLATFORM_H */
diff --git a/lib/isc/win32/ipv6.c b/lib/isc/win32/ipv6.c
index 0e1614f29c..694c427c82 100644
--- a/lib/isc/win32/ipv6.c
+++ b/lib/isc/win32/ipv6.c
@@ -15,13 +15,12 @@
  * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-/* $Id: ipv6.c,v 1.3 2001/07/09 21:06:10 gson Exp $ */
-
-#define LIBISC_EXTERNAL_DATA __declspec( dllexport )
+/* $Id: ipv6.c,v 1.4 2001/07/12 05:58:27 mayer Exp $ */
 
 #define off_t _off_t
 
 #include <isc/net.h>
+#include <isc/platform.h>
 
 LIBISC_EXTERNAL_DATA const struct in6_addr in6addr_any =
 	IN6ADDR_ANY_INIT;