Re: unrecognized command line option '-fmacro-prefix-map=old=new'

[Guy Harris <guy () alum mit edu>]

On Jan 26, 2019, at 9:19 AM, Jaap Keuter <jaap.keuter () xs4all nl> wrote:

> 2. What you’ve shown is a text stage of CMake to find compiler options, these are not Wireshark build errors.

Yes.  "CMakeError.log contains errors" is not a build failure; with any given CMake-using project, you *might* happen 
to be lucky enough that *all* command-line flags being tested happen to work on the compiler you're using and that 
*all* symbols/functions/etc. happen to be available and that *all* of the structure being tested have the structure 
member being tested for and..., but the chances of that are rather slim on a cross-platform project.

"CMakeError.log contains errors" is the CMake equivalent of "config.log contains errors" for autotools.  The standard 
output and error of CMake will report the test errors that are build errors rather than "not on this platform" test 
failures, just as the standard output and errors of an autotools configure script will report the test errors that are 
build errors rather than "not on this platform" test failures.
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