From ce3edba04a52cacae6e1fbc63660994991fdaebd Mon Sep 17 00:00:00 2001
From: erg <devnull@localhost>
Date: Tue, 8 May 2007 18:25:54 +0000
Subject: [PATCH] First pass at arranging for DLLs on Windows: need to provide
 import definition for users of extern data

---
 lib/agraph/aghdr.h  | 1 +
 lib/agraph/agraph.h | 3 +++
 lib/cdt/cdt.h       | 3 +++
 lib/sfio/sfio.h     | 4 ++++
 4 files changed, 11 insertions(+)

diff --git a/lib/agraph/aghdr.h b/lib/agraph/aghdr.h
index 7ccd3bdc9..11b90a38b 100644
--- a/lib/agraph/aghdr.h
+++ b/lib/agraph/aghdr.h
@@ -21,6 +21,7 @@ extern "C" {
 
 #ifndef ATT_GRAPHPVT_H
 #define ATT_GRAPHPVT_H 1
+#define _BLD_agraph 1
 
 #ifndef EXTERN
 #define EXTERN extern
diff --git a/lib/agraph/agraph.h b/lib/agraph/agraph.h
index 31262b8dc..de4802052 100644
--- a/lib/agraph/agraph.h
+++ b/lib/agraph/agraph.h
@@ -397,6 +397,9 @@ for the name. */
 #   if !defined(_BLD_agraph) && defined(__IMPORT__)
 #	define extern  __IMPORT__
 #   endif
+#endif
+#if !defined(_BLD_agraph) && defined(_WIN32)
+#define extern	__declspec(dllimport)
 #endif
 
     extern Agdesc_t Agdirected, Agstrictdirected, Agundirected,
diff --git a/lib/cdt/cdt.h b/lib/cdt/cdt.h
index 1daf92ab1..02804f7ba 100644
--- a/lib/cdt/cdt.h
+++ b/lib/cdt/cdt.h
@@ -166,6 +166,9 @@ extern "C" {
 #if _BLD_cdt && defined(__EXPORT__)
 #define extern	__EXPORT__
 #endif
+#if !_BLD_cdt && defined(_WIN32)
+#define extern	__declspec(dllimport)
+#endif
 #if !_BLD_cdt && defined(__IMPORT__)
 #define extern	__IMPORT__
 #endif
diff --git a/lib/sfio/sfio.h b/lib/sfio/sfio.h
index 98445fd26..76784399a 100644
--- a/lib/sfio/sfio.h
+++ b/lib/sfio/sfio.h
@@ -277,6 +277,9 @@ extern "C" {
 
      _BEGIN_EXTERNS_ extern ssize_t _Sfi;
 
+#if !_BLD_sfio && defined(_WIN32)
+#define extern	__declspec(dllimport)
+#endif
 /* standard in/out/err streams */
     extern Sfio_t *sfstdin;
     extern Sfio_t *sfstdout;
@@ -284,6 +287,7 @@ extern "C" {
     extern Sfio_t _Sfstdin;
     extern Sfio_t _Sfstdout;
     extern Sfio_t _Sfstderr;
+#undef extern
 
 #if _DLL && _DLL_INDIRECT_DATA
 /* The Uwin shared library environment requires these to be defined
-- 
2.40.0