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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