• %u <wfunction hotmail.com> Jun 26 2011
• Rainer Schuetze <r.sagitario gmx.de> Jun 26 2011
• %u <wfunction hotmail.com> Jun 27 2011

%u <wfunction hotmail.com> writes:

Hi!

I'm working on a little kernel with D, and so far, I've been able to
boot it and set up a physical memory manager.

Now, I'm trying to allow for module constructors in the code. However,
as soon as I define one, I see errors like this:

  Error 42: Symbol Undefined _D4core4stdc5stdio12__ModuleInfoZ

What does this error mean? Exactly what symbol is missing?

Thanks!

Rainer Schuetze <r.sagitario gmx.de> writes:

On 26.06.2011 10:58, %u wrote:
 Hi!

 I'm working on a little kernel with D, and so far, I've been able to
 boot it and set up a physical memory manager.

 Now, I'm trying to allow for module constructors in the code. However,
 as soon as I define one, I see errors like this:

    Error 42: Symbol Undefined _D4core4stdc5stdio12__ModuleInfoZ

 What does this error mean? Exactly what symbol is missing?


The static module constructor causes your module to take part in the 
module initialization phase, so it creates a data structure that 
contains info about modules which are imported and should be initialized 
first (referenced directly or maybe indirectly, if an imported module 
does not have static constructors on it's own).
The symbol above is the module info struct for core.stdc.stdio.

%u <wfunction hotmail.com> writes:

== Quote from Rainer Schuetze (r.sagitario gmx.de)'s article
 The static module constructor causes your module to take part in


 module initialization phase, so it creates a data structure that
 contains info about modules which are imported and should be


 first (referenced directly or maybe indirectly, if an imported


 does not have static constructors on it's own).
 The symbol above is the module info struct for core.stdc.stdio.


After playing with it it turned out that it was because the imported
modules weren't compiled in my project.

Not sure if that's a bug or not (it doesn't make much sense to be
forced to compile an external declaration...) but that was the
issue.