[
https://issues.apache.org/jira/browse/CLOWNFISH-53?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Nick Wellnhofer reassigned CLOWNFISH-53:
----------------------------------------
Assignee: Nick Wellnhofer
> Support MSVC in C mode
> ----------------------
>
> Key: CLOWNFISH-53
> URL: https://issues.apache.org/jira/browse/CLOWNFISH-53
> Project: Apache Lucy-Clownfish
> Issue Type: Improvement
> Components: Core
> Reporter: Nick Wellnhofer
> Assignee: Nick Wellnhofer
> Priority: Minor
>
> MSVC 12 which is part of Visual Studio 2013 has greatly improved support for
> C99. This makes it possible to build Clownfish projects in normal C mode as
> opposed to C++ mode which we traditionally used. I already switched to C mode
> for the Clownfish compiler and runtime.
> But there's a problem with projects linking to the Clownfish DLL. [As
> explained here|https://msdn.microsoft.com/en-us/library/twa2aw10.aspx], it's
> not possible to use the address of a global variable imported from a DLL via
> {{__declspec(dllimport)}} in a global initializer. This is only a problem for
> C code. C++ has much fewer restrictions regarding global initializers. We
> currently need this feature for the {{parent}} and {{parent_offset}} fields
> in the class and method spec structs.
> I already hit the same problem with MinGW. I was able to circumvent it by
> simply omitting {{__declspec(dllimport)}}. Further investigation showed that
> this works because of the {{--enable-auto-import}} feature of MinGW's linker.
> Unfortunately, this is a GNU-only extension.
> I can think of a couple of different solutions.
> * Define all spec structs as local variables in a function.
> * Initialize the problematic fields in a function.
> * Lookup parent classes and parent method offsets by name.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
