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[Tinycc-devel] You can use __declspec in TCC?

From: Ben Hutchinson
Subject: [Tinycc-devel] You can use __declspec in TCC?
Date: Tue, 12 Jan 2016 14:38:50 -0800

Can you explain a bit more of that, step by step?

Why is stdlib.h used here?

Also, I thought that to set attributes like dllexport, you needed to use __attributes__((dllexport)) directive, not __declspec (which isn't even mentioned in the TCC manual). Also, I thought that to make it stdcall, you needed to use __attributes__((stdcall)), not a standalone __stdcall. These are the "weird" things that set TCC apart from all other C compilers I thought, yet you say these C compiler standards also work in TCC?

And by the way, I think __stdcall (with 2 underscores) for setting the use of STDCALL calling convention is a Microsoft thing (as used in VC++). The official C standard for setting the use of STDCALL calling convention is actually supposed to be _stdcall (with 1 underscore). Isn't that correct?

And why use asm("zzz") as in your example? I think that sets up the compiler for compiling assembly code, not C code, meaning the function must then be written in assembly language.

Message: 3
Date: Tue, 12 Jan 2016 13:02:44 +0100
From: grischka <address@hidden>
To: address@hidden
Subject: Re: [Tinycc-devel] I got this burning question about *.def
        files and       TCC.
Message-ID: <address@hidden>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Ben Hutchinson wrote: ---
> I asked it before as part of a 2 part post, but only part of that post was
> replied to. So this question is still in play:
> Is there a way to set your exported functions with *.def files? I notice it
> usually automatically generates a *.def file when you use the
> __attributes__((dllexport)) directive. Is there a way to get it to READ,
> rather than write, a *.def file when exporting functions from a DLL, and in
> so doing, allow the *.def file to select which functions are exported? I
> really would like to know, so that I can undecorate my stdcall functions,
> via the use of *.def files.

No.  An "asm label" can do that though:

#include <stdlib.h>
__declspec(dllexport) int __stdcall fff(int a, int b) asm("zzz");

int __stdcall fff(int a, int b)

exports "zzz" instead of "address@hidden".  Thanks.


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