Allow Win32 to compile under MinGW. Major changes are:

Win32 port is now called 'win32' rather than 'win'
        add -lwsock32 on Win32
        make gethostname() be only used when kerberos4 is enabled
        use /port/getopt.c
        new /port/opendir.c routines
        disable GUC unix_socket_group on Win32
        convert some keywords.c symbols to KEYWORD_P to prevent conflict
        create new FCNTL_NONBLOCK macro to turn off socket blocking
        create new /include/port.h file that has /port prototypes, move
          out of c.h
        new /include/port/win32_include dir to hold missing include files
        work around ERROR being defined in Win32 includes

src/backend/port/Makefile

@@ -13,7 +13,7 @@
 # be converted to Method 2.  
 #
 # IDENTIFICATION
-#    $Header: /cvsroot/pgsql/src/backend/port/Makefile,v 1.18 2002/07/27 20:10:05 petere Exp $
+#    $Header: /cvsroot/pgsql/src/backend/port/Makefile,v 1.19 2003/05/15 16:35:29 momjian Exp $
 #
 #-------------------------------------------------------------------------
 
@@ -26,7 +26,7 @@ OBJS+=dynloader.o pg_sema.o pg_shmem.o
 OBJS+=$(TAS)
 
 ifeq ($(PORTNAME), qnx4)
-OBJS+=getrusage.o qnx4/SUBSYS.o
+OBJS+=qnx4/SUBSYS.o
 endif
 ifeq ($(PORTNAME), beos)
 OBJS+=beos/SUBSYS.o
@@ -34,6 +34,9 @@ endif
 ifeq ($(PORTNAME), darwin)
 OBJS+=darwin/SUBSYS.o
 endif
+ifeq ($(PORTNAME), win32)
+OBJS+=win32/SUBSYS.o
+endif
 
 all: SUBSYS.o
 
@@ -55,6 +58,11 @@ darwin/SUBSYS.o: darwin.dir
 darwin.dir:
 	$(MAKE) -C darwin all
 
+win32/SUBSYS.o: win32.dir
+
+win32.dir:
+	$(MAKE) -C win32 all
+
 tas.o: tas.s
 	$(CC) $(CFLAGS) -c $<
 
@@ -67,3 +75,5 @@ distclean clean:
 	$(MAKE) -C beos clean
 	$(MAKE) -C darwin clean
 	$(MAKE) -C qnx4 clean
+	$(MAKE) -C win32 clean
+

src/backend/port/dynloader/win32.c

@@ -1,4 +1,4 @@
-/* $Header: /cvsroot/pgsql/src/backend/port/dynloader/Attic/win.c,v 1.2 2003/03/21 17:18:34 petere Exp $ */
+/* $Header: /cvsroot/pgsql/src/backend/port/dynloader/win32.c,v 1.1 2003/05/15 16:35:29 momjian Exp $ */
 
 #include <windows.h>
 

src/backend/port/win32/sema.c

@@ -10,7 +10,6 @@
 
 #include "postgres.h"
 #include "storage/shmem.h"
-#include "sema.h"
 
 #include <errno.h>
 
@@ -131,7 +130,8 @@ semget(int semKey, int semNum, int flags)
 	Size		sem_set_size = sizeof(win32_sem_set_hdr) + semNum * (sizeof(HANDLE) + sizeof(int));
 	HANDLE	   *sem_handles = NULL;
 	int		   *sem_counts = NULL;
-
+	int			i;
+	
 	sec_attrs.nLength = sizeof(sec_attrs);
 	sec_attrs.lpSecurityDescriptor = NULL;
 	sec_attrs.bInheritHandle = TRUE;
@@ -158,7 +158,7 @@ semget(int semKey, int semNum, int flags)
 	sem_handles = (HANDLE *) ((off_t) new_set + new_set->m_semaphoreHandles);
 	sem_counts = (int *) ((off_t) new_set + new_set->m_semaphoreCounts);
 
-	for (int i = 0; i < semNum && ans; ++i)
+	for (i = 0; i < semNum && ans; ++i)
 	{
 		strcpy(num_part, _itoa(i, cur_num, 10));
 
@@ -186,8 +186,9 @@ semget(int semKey, int semNum, int flags)
 		return MAKE_OFFSET(new_set);
 	else
 	{
+		int i;
 		/* Blow away what we've got right now... */
-		for (int i = 0; i < semNum; ++i)
+		for (i = 0; i < semNum; ++i)
 		{
 			if (sem_handles[i])
 				CloseHandle(sem_handles[i]);