A quick try at un-breaking the Cygwin build. Whether it needs the

pgwin32_safestat remains to be determined, but in any case the current
code is not tolerable.

src/include/port.h

@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/port.h,v 1.119 2008/04/10 16:58:51 mha Exp $
+ * $PostgreSQL: pgsql/src/include/port.h,v 1.120 2008/04/11 23:53:00 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -281,9 +281,23 @@ extern void copydir(char *fromdir, char *todir, bool recurse);
 
 extern bool rmtree(char *path, bool rmtopdir);
 
+/* 
+ * stat() is not guaranteed to set the st_size field on win32, so we
+ * redefine it to our own implementation that is.
+ *
+ * We must pull in sys/stat.h here so the system header definition
+ * goes in first, and we redefine that, and not the other way around.
+ */
+#if defined(WIN32) && !defined(__CYGWIN__)
+#include <sys/stat.h>
+extern int	pgwin32_safestat(const char *path, struct stat *buf);
+#define stat(a,b) pgwin32_safestat(a,b)
+#endif
+
 #if defined(WIN32) && !defined(__CYGWIN__)
 
-/* open() and fopen() replacements to allow deletion of open files and
+/*
+ * open() and fopen() replacements to allow deletion of open files and
  * passing of other special options.
  */
 #define		O_DIRECT	0x80000000
@@ -298,19 +312,6 @@ extern FILE *pgwin32_fopen(const char *, const char *);
 #define popen(a,b) _popen(a,b)
 #define pclose(a) _pclose(a)
 
-/* 
- * stat() is not guaranteed to set the st_size field on win32, so we
- * redefine it to our own implementation that is.
- *
- * We must pull in sys/stat.h here so the system header definition
- * goes in first, and we redefine that, and not the other way around.
- */
-extern int pgwin32_safestat(const char *path, struct stat *buf);
-#if !defined(FRONTEND) && !defined(_DIRMOD_C)
-#include <sys/stat.h>
-#define stat(a,b) pgwin32_safestat(a,b)
-#endif
-
 /* Missing rand functions */
 extern long lrand48(void);
 extern void srand48(long seed);

src/port/dirmod.c

@@ -10,7 +10,7 @@
  *	Win32 (NT, Win2k, XP).	replace() doesn't work on Win95/98/Me.
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/port/dirmod.c,v 1.52 2008/04/10 16:58:51 mha Exp $
+ *	  $PostgreSQL: pgsql/src/port/dirmod.c,v 1.53 2008/04/11 23:53:00 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -449,13 +449,15 @@ report_and_fail:
 }
 
 
-#ifdef WIN32
+#if defined(WIN32) && !defined(__CYGWIN__)
+
+#undef stat
+
 /*
  * The stat() function in win32 is not guaranteed to update the st_size
  * field when run. So we define our own version that uses the Win32 API
  * to update this field.
  */
-#undef stat
 int 
 pgwin32_safestat(const char *path, struct stat *buf)
 {
@@ -480,4 +482,5 @@ pgwin32_safestat(const char *path, struct stat *buf)
 
 	return 0;
 }
+
 #endif