[glib/fix-gresource-export-msvc: 97/97] glib-compile-resources: Fix exporting on Visual Studio

[Chun-wei Fan <fanchunwei src gnome org>]

commit 47716bcec950e4be9fc204946331dec9515e57f5
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Wed Apr 29 19:04:36 2020 +0800

    glib-compile-resources: Fix exporting on Visual Studio
    
    Have the generated .c code decorate the prototypes with "G_MODULE_EXPORT"
    instead of "extern" when --internal is not being used, so that we also
    export the symbols from the generated code on Visual Studio-style
    compilers.  If --internal is used, we decorate the prototypes with
    "G_GNUC_INTERNAL", as we did before.
    
    Note that since the generated .c code does not attempt to include the
    generated headers (if one is also generated), the gnerated headers are
    still generated as they were before.

 gio/glib-compile-resources.c | 20 +++++++++++++++-----
 1 file changed, 15 insertions(+), 5 deletions(-)
---
diff --git a/gio/glib-compile-resources.c b/gio/glib-compile-resources.c
index 9b82ebade..f3675c152 100644
--- a/gio/glib-compile-resources.c
+++ b/gio/glib-compile-resources.c
@@ -1061,6 +1061,7 @@ main (int argc, char **argv)
       guint8 *data;
       gsize data_size;
       gsize i;
+      const char *export = "G_MODULE_EXPORT";
 
       if (!g_file_get_contents (binary_target, (char **)&data,
                                &data_size, NULL))
@@ -1081,6 +1082,9 @@ main (int argc, char **argv)
          return 1;
        }
 
+      if (internal)
+        export = "G_GNUC_INTERNAL";
+
       g_fprintf (file,
               "#include <gio/gio.h>\n"
               "\n"
@@ -1140,30 +1144,36 @@ main (int argc, char **argv)
       g_fprintf (file,
               "\n"
               "static GStaticResource static_resource = { %s_resource_data.data, sizeof 
(%s_resource_data.data)%s, NULL, NULL, NULL };\n"
-              "%s GResource *%s_get_resource (void);\n"
+              "\n"
+              "%s\n"
+              "GResource *%s_get_resource (void);\n"
               "GResource *%s_get_resource (void)\n"
               "{\n"
               "  return g_static_resource_get_resource (&static_resource);\n"
               "}\n",
-              c_name, c_name, (external_data ? "" : " - 1 /* nul terminator */"), linkage, c_name, c_name);
+              c_name, c_name, (external_data ? "" : " - 1 /* nul terminator */"),
+              export, c_name, c_name);
 
 
       if (manual_register)
        {
          g_fprintf (file,
                   "\n"
-                  "%s void %s_unregister_resource (void);\n"
+                  "%s\n"
+                  "void %s_unregister_resource (void);\n"
                   "void %s_unregister_resource (void)\n"
                   "{\n"
                   "  g_static_resource_fini (&static_resource);\n"
                   "}\n"
                   "\n"
-                  "%s void %s_register_resource (void);\n"
+                  "%s\n"
+                  "void %s_register_resource (void);\n"
                   "void %s_register_resource (void)\n"
                   "{\n"
                   "  g_static_resource_init (&static_resource);\n"
                   "}\n",
-                  linkage, c_name, c_name, linkage, c_name, c_name);
+                  export, c_name, c_name,
+                  export, c_name, c_name);
        }
       else
        {