/usr/include/wx-3.0/wx/link.h is in wx3.0-headers 3.0.4+dfsg-3.
This file is owned by root:root, with mode 0o644.
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// Name: wx/link.h
// Purpose: macros to force linking modules which might otherwise be
// discarded by the linker
// Author: Vaclav Slavik
// Copyright: (c) Vaclav Slavik
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#ifndef _WX_LINK_H_
#define _WX_LINK_H_
// This must be part of the module you want to force:
#define wxFORCE_LINK_THIS_MODULE(module_name) \
extern void _wx_link_dummy_func_##module_name (); \
void _wx_link_dummy_func_##module_name () { }
// And this must be somewhere where it certainly will be linked:
#define wxFORCE_LINK_MODULE(module_name) \
extern void _wx_link_dummy_func_##module_name (); \
static struct wxForceLink##module_name \
{ \
wxForceLink##module_name() \
{ \
_wx_link_dummy_func_##module_name (); \
} \
} _wx_link_dummy_var_##module_name;
#endif // _WX_LINK_H_
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