[libsoup] Declare a SOUP_VAR to externalize variables

[Ignacio Casal Quinteiro <icq src gnome org>]

commit e4572a770ecafc807296d9a2eb99e9dea0019887
Author: Ignacio Casal Quinteiro <icq gnome org>
Date:   Tue Oct 27 13:22:55 2015 +0100

    Declare a SOUP_VAR to externalize variables
    
    This is needed to properly externalize the variables
    on windows. Since we need to handle dllexport vs dllimport
    
    https://bugzilla.gnome.org/show_bug.cgi?id=757146

 libsoup/soup-method.h     |   30 +++++++++++++++---------------
 libsoup/soup-uri.h        |    9 +++++----
 libsoup/soup-version.h.in |   19 +++++++++++++++++++
 3 files changed, 39 insertions(+), 19 deletions(-)
---
diff --git a/libsoup/soup-method.h b/libsoup/soup-method.h
index 2934cca..cec59e3 100644
--- a/libsoup/soup-method.h
+++ b/libsoup/soup-method.h
@@ -58,22 +58,22 @@ G_BEGIN_DECLS
 /* Do not use these variables directly; use the macros above, which
  * ensure that they get initialized properly.
  */
-extern gpointer _SOUP_METHOD_OPTIONS;
-extern gpointer _SOUP_METHOD_GET;
-extern gpointer _SOUP_METHOD_HEAD;
-extern gpointer _SOUP_METHOD_POST;
-extern gpointer _SOUP_METHOD_PUT;
-extern gpointer _SOUP_METHOD_DELETE;
-extern gpointer _SOUP_METHOD_TRACE;
-extern gpointer _SOUP_METHOD_CONNECT;
+SOUP_VAR gpointer _SOUP_METHOD_OPTIONS;
+SOUP_VAR gpointer _SOUP_METHOD_GET;
+SOUP_VAR gpointer _SOUP_METHOD_HEAD;
+SOUP_VAR gpointer _SOUP_METHOD_POST;
+SOUP_VAR gpointer _SOUP_METHOD_PUT;
+SOUP_VAR gpointer _SOUP_METHOD_DELETE;
+SOUP_VAR gpointer _SOUP_METHOD_TRACE;
+SOUP_VAR gpointer _SOUP_METHOD_CONNECT;
 
-extern gpointer _SOUP_METHOD_PROPFIND;
-extern gpointer _SOUP_METHOD_PROPPATCH;
-extern gpointer _SOUP_METHOD_MKCOL;
-extern gpointer _SOUP_METHOD_COPY;
-extern gpointer _SOUP_METHOD_MOVE;
-extern gpointer _SOUP_METHOD_LOCK;
-extern gpointer _SOUP_METHOD_UNLOCK;
+SOUP_VAR gpointer _SOUP_METHOD_PROPFIND;
+SOUP_VAR gpointer _SOUP_METHOD_PROPPATCH;
+SOUP_VAR gpointer _SOUP_METHOD_MKCOL;
+SOUP_VAR gpointer _SOUP_METHOD_COPY;
+SOUP_VAR gpointer _SOUP_METHOD_MOVE;
+SOUP_VAR gpointer _SOUP_METHOD_LOCK;
+SOUP_VAR gpointer _SOUP_METHOD_UNLOCK;
 
 G_END_DECLS
 
diff --git a/libsoup/soup-uri.h b/libsoup/soup-uri.h
index 35e670c..1a81e97 100644
--- a/libsoup/soup-uri.h
+++ b/libsoup/soup-uri.h
@@ -39,10 +39,11 @@ GType       soup_uri_get_type              (void);
 #define SOUP_URI_SCHEME_RESOURCE _SOUP_ATOMIC_INTERN_STRING (_SOUP_URI_SCHEME_RESOURCE, "resource")
 #define SOUP_URI_SCHEME_WS       _SOUP_ATOMIC_INTERN_STRING (_SOUP_URI_SCHEME_WS, "ws")
 #define SOUP_URI_SCHEME_WSS      _SOUP_ATOMIC_INTERN_STRING (_SOUP_URI_SCHEME_WSS, "wss")
-extern gpointer _SOUP_URI_SCHEME_HTTP, _SOUP_URI_SCHEME_HTTPS;
-extern gpointer _SOUP_URI_SCHEME_FTP;
-extern gpointer _SOUP_URI_SCHEME_FILE, _SOUP_URI_SCHEME_DATA, _SOUP_URI_SCHEME_RESOURCE;
-extern gpointer _SOUP_URI_SCHEME_WS, _SOUP_URI_SCHEME_WSS;
+
+SOUP_VAR gpointer _SOUP_URI_SCHEME_HTTP, _SOUP_URI_SCHEME_HTTPS;
+SOUP_VAR gpointer _SOUP_URI_SCHEME_FTP;
+SOUP_VAR gpointer _SOUP_URI_SCHEME_FILE, _SOUP_URI_SCHEME_DATA, _SOUP_URI_SCHEME_RESOURCE;
+SOUP_VAR gpointer _SOUP_URI_SCHEME_WS, _SOUP_URI_SCHEME_WSS;
 
 SoupURI           *soup_uri_new_with_base         (SoupURI    *base,
                                            const char *uri_string);
diff --git a/libsoup/soup-version.h.in b/libsoup/soup-version.h.in
index 5c2c7a3..f0775a8 100644
--- a/libsoup/soup-version.h.in
+++ b/libsoup/soup-version.h.in
@@ -26,6 +26,25 @@ G_BEGIN_DECLS
 #define _SOUP_EXTERN extern
 #endif
 
+/* We prefix variable declarations so they can
+ * properly get exported in Windows DLLs.
+ */
+#ifndef SOUP_VAR
+#  ifdef G_PLATFORM_WIN32
+#    ifdef LIBSOUP_COMPILATION
+#      ifdef DLL_EXPORT
+#        define SOUP_VAR __declspec(dllexport)
+#      else /* !DLL_EXPORT */
+#        define SOUP_VAR extern
+#      endif /* !DLL_EXPORT */
+#    else /* !SOUP_COMPILATION */
+#      define SOUP_VAR extern __declspec(dllimport)
+#    endif /* !LIBSOUP_COMPILATION */
+#  else /* !G_PLATFORM_WIN32 */
+#    define SOUP_VAR _SOUP_EXTERN
+#  endif /* !G_PLATFORM_WIN32 */
+#endif /* SOUP_VAR */
+
 guint    soup_get_major_version (void);
 
 guint    soup_get_minor_version (void);