Work with ccache: Problem with MSVC /P (Preprocess to a File) option about msvc-wine

[mstorsjo]

• Use ccache depend mode. It doesn't run preprocessor but hash files listed in /showIncludes, which we already convert them to unix style paths.

So this would require the user to set some option to make ccache not try to use this mode?

• Postprocess the preprocessor output file: convert to unix style paths. This need implement in wine-msvc.sh wrapper.

Hmm. So the wrapper script would intercept any [/-]Fi option, and if present, do the path name rewriting on lines that look like #line in that output file? I guess that would work - if it doesn't end up being too much of a mess, I guess this could be acceptable?

[huangqinjin]

So this would require the user to set some option to make ccache not try to use this mode?

Yes. User need define CCACHE_DEPEND env var, or add depend_mode = true to ccache.conf.

Please see proposed #70.