For Win32/64 developers, the Wireshark Developer's Guide currently mentions
"Microsoft Visual Studio 2015 Community Edition" as the compiler to download
and install[1]. That is the version I'm currently running. Here are the
relevant details:
Microsoft Visual Studio Community 2015
Version 14.0.25431.01 Update 3
Microsoft .NET Framework
Version 4.7.02046
Installed Version: Community
Visual C++ 2015 00322-20000-00000-AA898
Microsoft Visual C++ 2015
When compiling Wireshark with this version of MSVC, it seems that /Qspectre is
not yet supported and so at last count, 312 warnings were generated, most
(all?) of the form, "cl : Command line warning D9002: ignoring unknown option
'/Qspectre'".
Microsoft's "Spectre mitigations in MSVC" page[2] indicates the following:
We initially plan to include support for /Qspectre in the following:
* Visual Studio 2017 version 15.6 Preview 4
* An upcoming servicing update to Visual Studio 2017 version 15.5
* A servicing update to Visual Studio 2017 "RTW"
* A servicing update to Visual Studio 2015 Update 3
I don't know whether the Community Edition of Visual Studio 2015 is included in
the planned servicing update or not, but I would expect it to be. In any case,
it seems that it's not yet available, even if it is planned.
Maybe there's a way to detect whether /Qspectre is supported by the compiler or
not and omit it if it isn't in order to avoid all of these warnings?
- Chris
[1]: https://www.wireshark.org/docs/wsdg_html_chunked/ChSetupWin32.html
[2]:
https://blogs.msdn.microsoft.com/vcblog/2018/01/15/spectre-mitigations-in-msvc/
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