__declspec(selectany)

[Dan Kegel]

Fergus Henderson wrote:
> On 05-Aug-2003, Dan Kegel <dank at kegel.com> wrote:
> 
>>Part of the solution might be to apply the following patch to the
>>gcc-3.3 source tree:
> 
> Rather than patching gcc, an easier solution would be to put the
> corresponding #defines for _cdecl etc. in a header file called say
> "ms_extensions.h", and then compile with "gcc -include ms_extensions.h ..."
> so that these #defines get automatically included in every compilation unit.

Silly me.  For some reason I thought the builtin declarations were
magic.  Here's a little demo that might show the basic idea.
Does this do what you needed, Boaz?
- Dan

$ gcc -include msextensions.h foo.c bar.c
$ ./a.out
Value of x is 7

$ gcc -include msextensions.h bar.c foo.c
$ ./a.out
Value of x is 1

::::::::::::::
msextensions.h
::::::::::::::
#define __declspec(x) __attribute__((x))
#define selectany weak

::::::::::::::
foo.c
::::::::::::::
int __declspec(selectany) x = 7;

::::::::::::::
bar.c
::::::::::::::
#include <stdio.h>

int __declspec(selectany) x = 1;

int main()
{
     printf("Value of x is %d\n", x);
}


-- 
Dan Kegel
http://www.kegel.com
http://counter.li.org/cgi-bin/runscript/display-person.cgi?user=78045