Re: Remove the eproto_db symbol exporting to keep the DLL delay-load feature on Windows

[Yang Luo <hsluoyb () gmail com>]

The weird thing is that the original libpcap used by Npcap/WinPcap also
exported eproto_db, but the build of WinDump doesn't complain that link
error. I don't know what the difference is here?

Error 646 error LNK1194: cannot delay-load 'wpcap.dll' due to import of
data symbol '__imp_eproto_db'; link without /DELAYLOAD:wpcap.dll


Cheers,
Yang


On Tue, Jun 28, 2016 at 1:56 PM, Yang Luo <hsluoyb () gmail com> wrote:

> Hi list,
>
> Because of libpcap has exported the a data structure called eproto_db (
> https://github.com/the-tcpdump-group/libpcap/blob/master/nametoaddr.c#L320),
> when I compiled WinDump in MSVC specifying "wpcap.dll" as a delay loaded
> DLL, I encountered the link error 1194. The cause is here:
> https://msdn.microsoft.com/en-us/library/w59k653y%28v=vs.80%29.aspx?f=255&MSPPError=-2147217396
> .
>
> Delay loading wpcap.dll is an important part for the switch between Npcap
> mode and WinPcap mode. And from the comment, it seems that exporting this
> data is not very critical. So can we remove the "PCAP_API_DEF" at the line
> beginning to disable the exporting?
>
>
> Cheers,
> Yang
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