--- origsrc/zip30/revision.h	2008-07-05 13:24:56.000000000 -0400
+++ src/zip30/revision.h	2009-08-04 16:46:09.143600000 -0400
@@ -58,7 +58,7 @@ ZCONST char *copyright[] = {
 };
 
 ZCONST char * far versinfolines[] = {
-"This is %s %s (%s), by Info-ZIP.",
+"This is %s %s (%s), by Cygwin. Original by Info-ZIP.",
 "Currently maintained by E. Gordon.  Please send bug reports to",
 "the authors using the web page at www.info-zip.org; see README for details.",
 "",
--- origsrc/zip30/unix/Makefile	2008-05-07 02:33:56.000000000 -0400
+++ src/zip30/unix/Makefile	2009-08-04 16:46:09.150600000 -0400
@@ -227,7 +227,7 @@ cray_v3:
 
 # Cygwin
 cygwin:
-	$(MAKE) $(MAKEF) generic CC="gcc" CPP="gcc -E" EXE=".exe"
+	$(MAKE) $(MAKEF) generic CC="gcc" CPP="gcc -E" E=".exe"
 
 # LynxOS
 lynx:
--- origsrc/zip30/unix/configure	2009-08-04 16:46:02.792600000 -0400
+++ src/zip30/unix/configure	2009-08-04 16:46:09.174600000 -0400
@@ -204,9 +204,19 @@ int main()
   return 0;
 }
 _EOF_
-      $CC $CFLAGS -o conftest conftest.c -lbz2 > /dev/null 2>/dev/null
+      $CC $CFLAGS $LDFLAGS -o conftest conftest.c -lbz2 > /dev/null 2>/dev/null
       if test $? -eq 0; then
-        echo "-- OS supports bzip2 - linking in bzip2"
+        nm `$CC $CFLAGS $LDFLAGS -print-file-name=libbz2.a` | grep bz_internal_error > /dev/null
+        if test $? -eq 0; then
+          echo "-- OS supports bzip2 - linking in bzip2"
+        else
+          echo "    OS provides bzip2 library but not built with the" 
+          echo "      BZ_NO_STDIO option"
+          echo "    WARNING:  We recommend using a bzip2 library compiled"
+          echo "      with BZ_NO_STDIO defined for proper error handling"
+          echo "    Please see the Zip installation instructions"
+          echo "    Continuing anyway with standard bzip2 library..."
+        fi
         CFLAGS="${CFLAGS} -DBZIP2_SUPPORT"
         LFLAGS2="${LFLAGS2} -lbz2"
       else
--- origsrc/zip30/unix/unix.c	2008-06-19 00:26:18.000000000 -0400
+++ src/zip30/unix/unix.c	2009-08-04 16:46:09.210600000 -0400
@@ -239,6 +239,14 @@ int *pdosflag;          /* output: force
   dosflag = dosify;     /* default for non-DOS and non-OS/2 */
 
   /* Find starting point in name before doing malloc */
+#ifdef __CYGWIN__
+  /* Strip drive specification */
+  t = *x && isascii((uch)*x) && *(x + 1) == ':' ? x + 2 : x;
+  /* Convert backslashes to slashes */
+  for (n = t; *n; n++)
+    if (*n == '\\')
+      *n = '/';
+#endif
   /* Strip "//host/share/" part of a UNC name */
   if (!strncmp(x,"//",2) && (x[2] != '\0' && x[2] != '/')) {
     n = x + 2;
@@ -251,8 +259,12 @@ int *pdosflag;          /* output: force
     }
     if (*n != '\0')
       t = n + 1;
+#ifdef __CYGWIN__
+  } /* we may already have adjusted t */
+#else
   } else
       t = x;
+#endif
   while (*t == '/')
     t++;                /* strip leading '/' chars to get a relative path */
   while (*t == '.' && t[1] == '/')
--- origsrc/zip30/zipsplit.c	2008-05-08 04:17:16.000000000 -0400
+++ src/zip30/zipsplit.c	2009-08-04 16:46:09.217600000 -0400
@@ -890,7 +890,7 @@ char **argv;            /* command line 
       strcpy(name, INDEX);
       printf("creating: %s\n", path);
       indexmade = 1;
-      if ((f = fopen(path, "w")) == NULL)
+      if ((f = fopen(path, FOPW)) == NULL) /* cygwin fix: use FOPW */
       {
         if (u && retry()) goto redobin;
         ziperr(ZE_CREAT, path);