RE: Windows epicsMMIODef.h

[Freddie Akeroyd - STFC UKRI via Core-talk <core-talk at aps.anl.gov>]

Hi Dirk,

Unfortunately auto linking doesn't seem to be supported by gcc on MinGW
https://www.boost.org/doc/libs/1_76_0/more/getting_started/windows.html#auto-linking  so though adding the pragma would be helpful to Visual Studio users, could it potentially lead to confusion with things building OK with visual studio but not gcc/MinGW? 

Regards,

Freddie

> -----Original Message-----
> From: Zimoch Dirk (PSI) <dirk.zimoch at psi.ch>
> Sent: 16 July 2021 12:05
> To: core-talk at aps.anl.gov
> Cc: Akeroyd, Freddie (STFC,RAL,ISIS) <freddie.akeroyd at stfc.ac.uk>
> Subject: Windows epicsMMIODef.h
> 
> Hi folks,
> 
> I think that os/WIN32/epicsMMIODef.h sould contain a line #pragma
> comment(lib, "ws2_32.lib")
> 
> That would allow dll modules using it to automatically link winsock2 and avoid
> the error unresolved external symbol __imp_htonl without the user having to
> think about adding winsock2 to the Makefile.
> 
> What do Windows experts think about this? (Freddie?)
> 
> Dirk
> 


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