I see this warning when compiling with VS2015. > cl : Command line warning D9002 : ignoring unknown option '/arch:SSE2'
Are you doing a 32-bits build or a 64-bits build?
If the latter, does it happen for the former?
I also see this warning in my config.log. I'm building a Win64 build.
I'm also doing a 64bit build. According to VS2015's document, there is no SSE2 arch for x64 build, and thus the warning.  x64 build only has AVX and AVX2 currently, while x86 has IA32, SSE, and SSE2 in addition to x64.  https://msdn.microsoft.com/en-us/library/7t5yh4fd.aspx  https://msdn.microsoft.com/en-us/library/jj620901.aspx
Attachment #8722637 - Flags: review?(mh+mozilla) → review+
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