Strange problem linking a library on windows-x64

[Mark Rivers via Tech-talk <tech-talk at aps.anl.gov>]

Folks,

I am having a strange problem linking a library on windows-x64 (dynamic build).  The library compiles and links fine on windows-x64-static (static build).

On windows-x64 the library compiles fine, but generates this error when linking:

link -nologo -subsystem:windows -dll -LTCG -incremental:no -opt:ref -release  -MACHINE:X64           -out:ixwebsocket.dll -implib:ixwebsocket.lib     IXBench.obj IXCancellationRequest.obj IXConnectionState.obj IXDNSLookup.obj IXExponentialBackoff.obj IXGzipCodec.obj IXHttpClient.obj IXHttp.obj IXHttpServer.obj IXNetSystem.obj IXSelectInterrupt.obj IXSelectInterruptEvent.obj IXSelectInterruptFactory.obj IXSelectInterruptPipe.obj IXSetThreadName.obj IXSocketAppleSSL.obj IXSocketConnect.obj IXSocket.obj IXSocketFactory.obj IXSocketMbedTLS.obj IXSocketOpenSSL.obj IXSocketServer.obj IXSocketTLSOptions.obj IXStrCaseCompare.obj IXUdpSocket.obj IXUrlParser.obj IXUserAgent.obj IXUuid.obj IXWebSocketCloseConstants.obj IXWebSocket.obj IXWebSocketHandshake.obj IXWebSocketHttpHeaders.obj IXWebSocketPerMessageDeflateCodec.obj IXWebSocketPerMessageDeflate.obj IXWebSocketPerMessageDeflateOptions.obj IXWebSocketProxyServer.obj IXWebSocketServer.obj IXWebSocketTransport.obj        ws2_32.lib crypt32.lib bcrypt.lib

Generating code

Finished generating code

"Installing shared library ../../../../bin/windows-x64/ixwebsocket.dll"

"Installing library ../../../../lib/windows-x64/ixwebsocket.lib"

installEpics.pl: No such file 'ixwebsocket.lib' at H:/epics-devel/base-7.0.10/bin/windows-x64/installEpics.pl line 54.

make[3]: *** [H:/epics-devel/base-7.0.10/configure/RULES_BUILD:489: ../../../../lib/windows-x64/ixwebsocket.lib] Error 2

make[3]: Leaving directory 'J:/epics/devel/quadEM/quadEMApp/FX4Src/ixwebsocket/O.windows-x64'

make[2]: *** [H:/epics-devel/base-7.0.10/configure/RULES_ARCHS:58: install.windows-x64] Error 2

make[2]: Leaving directory 'J:/epics/devel/quadEM/quadEMApp/FX4Src/ixwebsocket'

make[1]: *** [H:/epics-devel/base-7.0.10/configure/RULES_DIRS:85: FX4Src/ixwebsocket.install] Error 2

make[1]: Leaving directory 'J:/epics/devel/quadEM/quadEMApp'

make: *** [H:/epics-devel/base-7.0.10/configure/RULES_DIRS:85: quadEMApp.install] Error 2

Note that the link command did not generate an error.  However, there is an error when it tries to install the ixwebsocket.lib.  The problem is that the library file is not being created.

If I cd to the O.windows-x64 directory and manually type the "link" command it completes with no errors:

J:\epics\devel\quadEM\quadEMApp\FX4Src\ixwebsocket\O.windows-x64>link -nologo -subsystem:windows -dll -LTCG -incremental:no -opt:ref -release  -MACHINE:X64           -out:ixwebsocket.dll -implib:ixwebsocket.lib     IXBench.obj IXCancellationRequest.obj IXConnectionState.obj IXDNSLookup.obj IXExponentialBackoff.obj IXGzipCodec.obj IXHttpClient.obj IXHttp.obj IXHttpServer.obj IXNetSystem.obj IXSelectInterrupt.obj IXSelectInterruptEvent.obj IXSelectInterruptFactory.obj IXSelectInterruptPipe.obj IXSetThreadName.obj IXSocketAppleSSL.obj IXSocketConnect.obj IXSocket.obj IXSocketFactory.obj IXSocketMbedTLS.obj IXSocketOpenSSL.obj IXSocketServer.obj IXSocketTLSOptions.obj IXStrCaseCompare.obj IXUdpSocket.obj IXUrlParser.obj IXUserAgent.obj IXUuid.obj IXWebSocketCloseConstants.obj IXWebSocket.obj IXWebSocketHandshake.obj IXWebSocketHttpHeaders.obj IXWebSocketPerMessageDeflateCodec.obj IXWebSocketPerMessageDeflate.obj IXWebSocketPerMessageDeflateOptions.obj IXWebSocketProxyServer.obj IXWebSocketServer.obj IXWebSocketTransport.obj        ws2_32.lib crypt32.lib bcrypt.lib

Generating code

Finished generating code

J:\epics\devel\quadEM\quadEMApp\FX4Src\ixwebsocket\O.windows-x64>

It should have created ixwebsocket.dll and ixwebsocket.lib.  However, when I look for those files in the O.windows-x64 directory only the .dll file exists, not the .lib file:

J:\epics\devel\quadEM\quadEMApp\FX4Src\ixwebsocket\O.windows-x64>dir *.lib *.dll

 Volume in drive J is people_rw

 Volume Serial Number is 5005-CD09

 Directory of J:\epics\devel\quadEM\quadEMApp\FX4Src\ixwebsocket\O.windows-x64

 Directory of J:\epics\devel\quadEM\quadEMApp\FX4Src\ixwebsocket\O.windows-x64

06/09/2026  04:37 PM           284,672 ixwebsocket.dll

               1 File(s)        284,672 bytes

               0 Dir(s)  9,569,302,556,672 bytes free

I have never seen this problem before.  Any idea what could cause it?

Thanks,

Mark