[Octave-bug-tracker] [bug #41711] Build fails for libtool: moc-file-editor-interface.cc: PIC: No such file or directory

[Mike Miller]

Update of bug #41711 (project octave):

                  Status:                    None => Need Info              

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Follow-up Comment #1:

Hi, thanks for your bug report. I think this falls under user error due to
your use of the -fPIC option in CPPFLAGS. Please try removing that option from
your configure line and report back if that allows your build to succeed.

Now, the specific reason for the error in this case is that -fPIC isn't really
a preprocessor option, it's a compilation option. So it shouldn't be in
CPPFLAGS, it should rather be in CFLAGS/CXXFLAGS/FFLAGS. But one of the
advantages of using libtool is that it figures this stuff out on its own, so
you really don't need to specify -fPIC at all.

Lastly, Octave is passing all preprocessor options on to the moc command,
which only understands the basics: -I, -D, and -U. The -f option to moc means
"add an explicit #include for the following file", which is exactly what
you're seeing.

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