RFC: Cygwin 64 bit?
Wed Jun 29 06:57:00 GMT 2011
On Jun 28 23:45, Thomas Wolff wrote:
> Am 28.06.2011 23:36, schrieb Ryan Johnson:
> >>On Jun 28 22:36, Thomas Wolff wrote:
> >>>Can't cygwin compilation ensure that the cygwin1.dll is always
> >>>loaded first so it could take care of this (if only by then adding
> >>>to the path)?
> >>>(I guess the answer may be no because Windows is juggling with
> >>>the DLLs...)
> >The answer is definitely "no." Windows can map dlls in any order
> >it pleases, and is only semi-required to initialize them in
> >dependency order (because dlls are often circular dependent
> >anyway). In particular, dlls which suffer base address collisions
> >tend to be loaded before cygwin1.dll
> Last feable attempt: So why does cygwin have to let Windows load the
> DLLs at all? Couldn't the programs just have a stub that uses a
> dedicated version of dlopen for dynamic linking?
In theory, yes. Every libfoo.dll.a would have to point back to Cygwin
and Cygwin could call LoadLibrary/GetProcAddress so that there's no
explicit load-time linking anymore as far as Cywin DLLs are concerned.
That requires support by gcc/binutils/libtool(?) when building shared
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Project Co-Leader cygwin AT cygwin DOT com
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