The attached patch enables the contrib subtree to build cleanly under

Cygwin with the possible exception of mSQL-interface.  Since I don't
have mSQL installed, I skipped this tool.

Except for dealing with a missing getopt.h (oid2name) and HUGE (seg),
the bulk of the patch uses the standard PostgreSQL approach to deal with
Windows DLL issues.

I tested the build aspect of this patch under Cygwin and Linux without
any ill affects.  Note that I did not actually attempt to test the code
for functionality.

The procedure to apply the patch is as follows:

    $ # save the attachment as /tmp/contrib.patch
    $ # change directory to the top of the PostgreSQL source tree
    $ patch -p0 </tmp/contrib.patch

Jason

contrib/array/Makefile

 #
-# $Header: /cvsroot/pgsql/contrib/array/Attic/Makefile,v 1.14 2001/02/20 19:20:26 petere Exp $
+# $Header: /cvsroot/pgsql/contrib/array/Attic/Makefile,v 1.15 2001/06/18 21:38:01 momjian Exp $
 #
 
 subdir = contrib/array
@@ -11,6 +11,7 @@ SONAME	:= $(NAME)$(DLSUFFIX)
 
 override CPPFLAGS := -I$(srcdir) $(CPPFLAGS)
 override CFLAGS += $(CFLAGS_SL)
+override DLLLIBS := $(BE_DLLLIBS) $(DLLLIBS)
 
 all: $(SONAME) $(NAME).sql
 

contrib/cube/Makefile

 #
-# $Header: /cvsroot/pgsql/contrib/cube/Makefile,v 1.3 2001/02/20 19:20:27 petere Exp $
+# $Header: /cvsroot/pgsql/contrib/cube/Makefile,v 1.4 2001/06/18 21:38:01 momjian Exp $
 #
 
 subdir = contrib/cube
@@ -15,6 +15,7 @@ SO_MAJOR_VERSION= 1
 SO_MINOR_VERSION= 0
 
 override CPPFLAGS := -I$(srcdir) $(CPPFLAGS)
+override DLLLIBS := $(BE_DLLLIBS) $(DLLLIBS)
 
 OBJS= cube.o cubeparse.o cubescan.o buffer.o
 

contrib/dblink/Makefile

@@ -12,6 +12,7 @@ override CFLAGS += -I$(srcdir)
 override CFLAGS += -I$(include_srcdir)
 override CFLAGS += -I$(libpq_srcdir)
 override CFLAGS += $(CFLAGS_SL)
+override DLLLIBS := $(BE_DLLLIBS) $(DLLLIBS)
 
 OBJS	= $(NAME).o
 

contrib/earthdistance/Makefile

 #
-# $Header: /cvsroot/pgsql/contrib/earthdistance/Makefile,v 1.9 2001/05/30 12:58:45 momjian Exp $
+# $Header: /cvsroot/pgsql/contrib/earthdistance/Makefile,v 1.10 2001/06/18 21:38:01 momjian Exp $
 #
 
 subdir = contrib/earthdistance
@@ -11,6 +11,7 @@ SONAME	:= $(NAME)$(DLSUFFIX)
 
 override CPPFLAGS := -I$(srcdir) $(CPPFLAGS)
 override CFLAGS += $(CFLAGS_SL)
+override DLLLIBS := $(BE_DLLLIBS) $(DLLLIBS)
 
 all: $(SONAME) $(NAME).sql
 

contrib/fulltextindex/Makefile

 #
-# $Header: /cvsroot/pgsql/contrib/fulltextindex/Attic/Makefile,v 1.9 2001/02/20 19:20:27 petere Exp $
+# $Header: /cvsroot/pgsql/contrib/fulltextindex/Attic/Makefile,v 1.10 2001/06/18 21:38:01 momjian Exp $
 #
 
 subdir = contrib/fulltextindex
@@ -11,6 +11,7 @@ SONAME	:= $(NAME)$(DLSUFFIX)
 
 override CPPFLAGS := -I$(srcdir) $(CPPFLAGS)
 override CFLAGS += $(CFLAGS_SL)
+override DLLLIBS := $(BE_DLLLIBS) $(DLLLIBS)
 
 all: $(SONAME) $(NAME).sql
 

contrib/intarray/Makefile

-# $Header: /cvsroot/pgsql/contrib/intarray/Makefile,v 1.6 2001/05/31 19:25:27 tgl Exp $
+# $Header: /cvsroot/pgsql/contrib/intarray/Makefile,v 1.7 2001/06/18 21:38:01 momjian Exp $
 
 subdir = contrib/intarray
 top_builddir = ../..
@@ -13,6 +13,7 @@ SO_MAJOR_VERSION= 1
 SO_MINOR_VERSION= 0
 
 override CPPFLAGS := -I$(srcdir) $(CPPFLAGS)
+override DLLLIBS := $(BE_DLLLIBS) $(DLLLIBS)
 
 OBJS= _int.o
 

contrib/isbn_issn/Makefile

 #
-# $Header: /cvsroot/pgsql/contrib/isbn_issn/Attic/Makefile,v 1.9 2001/02/20 19:20:27 petere Exp $
+# $Header: /cvsroot/pgsql/contrib/isbn_issn/Attic/Makefile,v 1.10 2001/06/18 21:38:01 momjian Exp $
 #
 
 subdir = contrib/isbn_issn
@@ -11,6 +11,7 @@ SONAME	:= $(NAME)$(DLSUFFIX)
 
 override CPPFLAGS := -I$(srcdir) $(CPPFLAGS)
 override CFLAGS += $(CFLAGS_SL)
+override DLLLIBS := $(BE_DLLLIBS) $(DLLLIBS)
 
 all: $(SONAME) $(NAME).sql
 

contrib/lo/Makefile

 #
-# $Header: /cvsroot/pgsql/contrib/lo/Makefile,v 1.9 2001/02/20 19:20:27 petere Exp $
+# $Header: /cvsroot/pgsql/contrib/lo/Makefile,v 1.10 2001/06/18 21:38:01 momjian Exp $
 #
 
 subdir = contrib/lo
@@ -14,6 +14,7 @@ MODS	= $(NAME)$(DLSUFFIX)
 
 override CPPFLAGS := -I$(srcdir) $(CPPFLAGS)
 override CFLAGS += $(CFLAGS_SL)
+override DLLLIBS := $(BE_DLLLIBS) $(DLLLIBS)
 
 ifdef REFINT_VERBOSE
 override CPPFLAGS+= -DREFINT_VERBOSE

contrib/miscutil/Makefile

 #
-# $Header: /cvsroot/pgsql/contrib/miscutil/Attic/Makefile,v 1.14 2001/02/20 19:20:27 petere Exp $
+# $Header: /cvsroot/pgsql/contrib/miscutil/Attic/Makefile,v 1.15 2001/06/18 21:38:01 momjian Exp $
 #
 
 subdir = contrib/miscutil
@@ -11,6 +11,7 @@ SONAME	:= $(NAME)$(DLSUFFIX)
 
 override CPPFLAGS := -I$(srcdir) $(CPPFLAGS)
 override CFLAGS += $(CFLAGS_SL)
+override DLLLIBS := $(BE_DLLLIBS) $(DLLLIBS)
 
 all: $(SONAME) $(NAME).sql
 

contrib/noupdate/Makefile

 #
-# $Header: /cvsroot/pgsql/contrib/noupdate/Attic/Makefile,v 1.7 2001/02/20 19:20:27 petere Exp $
+# $Header: /cvsroot/pgsql/contrib/noupdate/Attic/Makefile,v 1.8 2001/06/18 21:38:02 momjian Exp $
 #
 
 subdir = contrib/noupdate
@@ -11,6 +11,7 @@ SONAME	:= $(NAME)$(DLSUFFIX)
 
 override CPPFLAGS := -I$(srcdir) $(CPPFLAGS)
 override CFLAGS += $(CFLAGS_SL)
+override DLLLIBS := $(BE_DLLLIBS) $(DLLLIBS)
 
 all: $(SONAME) $(NAME).sql
 

contrib/oid2name/oid2name.c

@@ -9,6 +9,7 @@
 #include <stdlib.h>
 #include <unistd.h>
 #include <string.h>
+#include <getopt.h>
 
 #include "libpq-fe.h"
 

contrib/pgcrypto/Makefile

 #
-# $Header: /cvsroot/pgsql/contrib/pgcrypto/Makefile,v 1.3 2001/02/20 15:34:14 momjian Exp $
+# $Header: /cvsroot/pgsql/contrib/pgcrypto/Makefile,v 1.4 2001/06/18 21:38:02 momjian Exp $
 #
 
 subdir = contrib/pgcrypto
@@ -43,6 +43,7 @@ SO_MAJOR_VERSION = 0
 SO_MINOR_VERSION = 1
 
 override CPPFLAGS	+= $(CRYPTO_CFLAGS) -I$(srcdir) 
+override DLLLIBS := $(BE_DLLLIBS) $(DLLLIBS)
 
 all: all-lib $(NAME).sql
 

contrib/rserv/Makefile

@@ -16,6 +16,7 @@ SCRIPTS	= InitRservTest
 
 override CPPFLAGS := -I$(srcdir) $(CPPFLAGS)
 override CFLAGS += $(CFLAGS_SL)
+override DLLLIBS := $(BE_DLLLIBS) $(DLLLIBS)
 
 
 all: $(SQLS) $(TCLS) $(PERLS) $(SCRIPTS) $(SONAME)

contrib/seg/Makefile

 #
-# $Header: /cvsroot/pgsql/contrib/seg/Makefile,v 1.3 2001/02/20 19:20:28 petere Exp $
+# $Header: /cvsroot/pgsql/contrib/seg/Makefile,v 1.4 2001/06/18 21:38:02 momjian Exp $
 #
 
 subdir = contrib/seg
@@ -15,6 +15,7 @@ SO_MAJOR_VERSION= 1
 SO_MINOR_VERSION= 0
 
 override CPPFLAGS := -I$(srcdir) $(CPPFLAGS)
+override DLLLIBS := $(BE_DLLLIBS) $(DLLLIBS)
 
 OBJS= seg.o segparse.o segscan.o buffer.o
 

contrib/seg/segparse.y

@@ -11,6 +11,10 @@
 #include "postgres.h"
 #include "utils/elog.h"
   
+#ifdef __CYGWIN__
+#define HUGE HUGE_VAL
+#endif /* __CYGWIN__ */
+
 #undef yylex                  /* falure to redefine yylex will result in calling the */
 #define yylex seg_yylex       /* wrong scanner when running inside postgres backend  */
 

contrib/soundex/Makefile

 #
-# $Header: /cvsroot/pgsql/contrib/soundex/Attic/Makefile,v 1.9 2000/10/20 21:03:28 petere Exp $
+# $Header: /cvsroot/pgsql/contrib/soundex/Attic/Makefile,v 1.10 2001/06/18 21:38:02 momjian Exp $
 #
 
 subdir = contrib/soundex
@@ -11,6 +11,7 @@ SONAME	:= $(NAME)$(DLSUFFIX)
 
 override CPPFLAGS += -I$(srcdir)
 override CFLAGS += $(CFLAGS_SL)
+override DLLLIBS := $(BE_DLLLIBS) $(DLLLIBS)
 
 all: $(SONAME) $(NAME).sql
 

contrib/string/Makefile

  #
-# $Header: /cvsroot/pgsql/contrib/string/Attic/Makefile,v 1.14 2001/02/20 19:20:28 petere Exp $
+# $Header: /cvsroot/pgsql/contrib/string/Attic/Makefile,v 1.15 2001/06/18 21:38:02 momjian Exp $
 #
 
 subdir = contrib/string
@@ -11,6 +11,7 @@ SONAME	:= $(NAME)$(DLSUFFIX)
 
 override CPPFLAGS := -I$(srcdir) $(CPPFLAGS)
 override CFLAGS += $(CFLAGS_SL)
+override DLLLIBS := $(BE_DLLLIBS) $(DLLLIBS)
 
 all: $(SONAME) $(NAME).sql
 

contrib/userlock/Makefile

 #
-# $Header: /cvsroot/pgsql/contrib/userlock/Attic/Makefile,v 1.14 2001/02/20 19:20:28 petere Exp $
+# $Header: /cvsroot/pgsql/contrib/userlock/Attic/Makefile,v 1.15 2001/06/18 21:38:02 momjian Exp $
 #
 
 subdir = contrib/userlock
@@ -11,6 +11,7 @@ SONAME	:= $(NAME)$(DLSUFFIX)
 
 override CPPFLAGS := -I$(srcdir) $(CPPFLAGS)
 override CFLAGS += $(CFLAGS_SL)
+override DLLLIBS := $(BE_DLLLIBS) $(DLLLIBS)
 
 all: $(SONAME) $(NAME).sql
 

src/include/miscadmin.h

@@ -12,7 +12,7 @@
  * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: miscadmin.h,v 1.86 2001/06/13 21:44:41 tgl Exp $
+ * $Id: miscadmin.h,v 1.87 2001/06/18 21:38:02 momjian Exp $
  *
  * NOTES
  *	  some of the information in this file should be moved to
@@ -115,7 +115,7 @@ extern int	PostmasterMain(int argc, char *argv[]);
 extern bool Noversion;
 extern char *DataDir;
 
-extern int	MyProcPid;
+extern DLLIMPORT int	MyProcPid;
 extern struct Port *MyProcPort;
 extern long MyCancelKey;
 
@@ -126,7 +126,7 @@ extern char OutputFileName[];
  *
  * extern BackendId    MyBackendId;
  */
-extern Oid	MyDatabaseId;
+extern DLLIMPORT Oid	MyDatabaseId;
 
 extern bool IsUnderPostmaster;
 

src/include/storage/shmem.h

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: shmem.h,v 1.28 2001/03/22 04:01:09 momjian Exp $
+ * $Id: shmem.h,v 1.29 2001/06/18 21:38:02 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -36,7 +36,7 @@ typedef unsigned long SHMEM_OFFSET;
  * The macros in this header file can only cope with offsets into this
  * shared memory region!
  */
-extern SHMEM_OFFSET ShmemBase;
+extern DLLIMPORT SHMEM_OFFSET ShmemBase;
 
 
 /* coerce an offset into a pointer in this process's address space */

src/include/utils/tqual.h

@@ -8,7 +8,7 @@
  * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: tqual.h,v 1.30 2001/01/24 19:43:29 momjian Exp $
+ * $Id: tqual.h,v 1.31 2001/06/18 21:38:02 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -36,7 +36,7 @@ typedef SnapshotData *Snapshot;
 
 extern Snapshot SnapshotDirty;
 extern Snapshot QuerySnapshot;
-extern Snapshot SerializableSnapshot;
+extern DLLIMPORT Snapshot SerializableSnapshot;
 
 extern bool ReferentialIntegritySnapshotOverride;