[vala/staging] codegen: Add replacement for G_(BEGIN|END)_DECLS in non GOBJECT profile

[Rico Tzschichholz <ricotz src gnome org>]

commit 846c5d70f24f14fa57e15687acef69057ce272b6
Author: Alistair Thomas <astavale yahoo co uk>
Date:   Sat Nov 3 14:28:52 2018 +0100

    codegen: Add replacement for G_(BEGIN|END)_DECLS in non GOBJECT profile
    
    Fixes https://gitlab.gnome.org/GNOME/vala/issues/622

 codegen/valaccodebasemodule.vala | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/codegen/valaccodebasemodule.vala b/codegen/valaccodebasemodule.vala
index 56a91f347..394d710e1 100644
--- a/codegen/valaccodebasemodule.vala
+++ b/codegen/valaccodebasemodule.vala
@@ -544,7 +544,7 @@ public abstract class Vala.CCodeBaseModule : CodeGenerator {
                        if (context.profile == Profile.GOBJECT) {
                                ret = header_file.store (context.header_filename, null, 
context.version_header, false, "G_BEGIN_DECLS", "G_END_DECLS");
                        } else {
-                               ret = header_file.store (context.header_filename, null, 
context.version_header, false);
+                               ret = header_file.store (context.header_filename, null, 
context.version_header, false, "#ifdef  __cplusplus\nextern \"C\" {\n#endif", "#ifdef  
__cplusplus\n}\n#endif");
                        }
                        if (!ret) {
                                Report.error (null, "unable to open `%s' for writing".printf 
(context.header_filename));
@@ -557,7 +557,7 @@ public abstract class Vala.CCodeBaseModule : CodeGenerator {
                        if (context.profile == Profile.GOBJECT) {
                                ret = internal_header_file.store (context.internal_header_filename, null, 
context.version_header, false, "G_BEGIN_DECLS", "G_END_DECLS");
                        } else {
-                               ret = internal_header_file.store (context.internal_header_filename, null, 
context.version_header, false);
+                               ret = internal_header_file.store (context.internal_header_filename, null, 
context.version_header, false, "#ifdef  __cplusplus\nextern \"C\" {\n#endif", "#ifdef  
__cplusplus\n}\n#endif");
                        }
                        if (!ret) {
                                Report.error (null, "unable to open `%s' for writing".printf 
(context.internal_header_filename));