Experimental Physics and
Industrial Control System

From: Johnson, Andrew N. <anj at anl.gov>
Sent: Friday, June 11, 2021 2:33 PM
To: Mark Rivers <rivers at cars.uchicago.edu>
Cc: EPICS core-talk <core-talk at aps.anl.gov>
Subject: Re: Problem building ezcaIDL on Windows

 

If the Makefile contains these lines then it builds the DLL correctly on windows-x64-static.  dumpbin /exports shows the correct exported symbols.

 

SHARED_LIBRARIES=YES

LIBRARY_HOST = ezcaIDL

 

If the Makefile contains these lines then it builds the DLL, but the DLL does not export any symbols.

 

#SHARED_LIBRARIES=YES

#LIBRARY_HOST = ezcaIDL

LOADABLE_LIBRARY_HOST = ezcaIDL

 

H:\epics\extensions_new\src\ezcaIDL>dumpbin /exports ..\..\bin\windows-x64-static\ezcaIDL.dll

Microsoft (R) COFF/PE Dumper Version 14.00.24215.1

Copyright (C) Microsoft Corporation.  All rights reserved.

 

 

Dump of file ..\..\bin\windows-x64-static\ezcaIDL.dll

 

File Type: DLL

 

  Summary

 

       15000 .data

        1000 .gfids

        8000 .pdata

       2C000 .rdata

        2000 .reloc

       74000 .text

        1000 .tls

My guess is that if you restored the .def file(s) that might fix it – don't they provide the linker with a list of symbols to export? The other solution would be to decorate all the symbols that need to be exported inside the source code, but that’s going to take more work.

- Andrew