Borland .def alias not working

[Rhubarb]

The problem is .def aliasing of DLL functions is not working as
expected. I can get an alias in the DLL, but then the original
function name disappears.

I am trying to port a large Borland (C++ Release 5.0) C system to
MSVC. The current strategy is to compile the Borland main program(s)
in MSVC and have them call the Borland DLLs. Then port each DLL to
MSVC. So I am trying to use Example 1 in :-

http://web.archive.org/web/20030802140622/bcbdev.com/articles/bcbdll.htm#example1

The exported Borland DLL functions are EXPENTRY (=__stdcall) so I have
modified them to use __cdecl. There is a .def file which I have
modifed to add aliases (sans underscores) :
func ; __stdcall becomes instead
func = _func ; __cdecl with alias (format, alias
= _orig)

The .def is on the tlink32 (Turbo Link 1.6.71.0) command line as it
should be. Unfortunately the aliasing does not seem to work. I have
added 3 identical test routines to illustrate the problem, atest(),
btest() and ctest() like :

void
__cdecl __declspec(dllexport) atest();
void atest() { }

the .def file has :

EXPORTS
atest ; should cause a warning since atest
does not exist (but _atest exists)
_btest
ctest = _ctest

In Dependecy Walker I see :

_btest
ctest here is the new alias. good. but where is the
original function (_ctest)????
_atest exported cos of the __declspec(dllexport)

But I would expect to see :
_btest
_ctest original and
ctest alias
_atest

The aliased orginal (_ctest) disappears, but it should not. I need the
original function names while porting to make sure that the original
(pure borland) system builds and work despite all the changes I make
for the port.

This aliasing technique should "just work" but it has got me pulling
my hair out.

I would greatly appreciate any input on this

Peter Cutting

[Rhubarb]

a solution is to do the following

EXPORTS
_afunc ; exports original func
afunc = _afunc ; exports alias