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$NetBSD: normalise.txt,v 1.1 2014/09/17 12:40:56 joerg Exp $
The first phase of wrapper processing for cc-ish wrappers is argument
normalisation. This simplifies processing in latter steps.
Transformations done in this phase:
1. Empty arguments are suppressed.
2. Arguments of the form "-Xlinker -Wl,foo" are converted to "-Wl,foo".
All other arguments of the form "-Xlinker foo" are converted to "-Wl,foo".
3. Arguments of the form "-Wl,*,*" are split into separate -Wl options.
4. Arguments of the form "-I foo", "-D foo", "-L foo" or
"-Wl,-L -Wl,foo" are converted to the single argument form "-Ifoo",
"-Dfoo", "-Lfoo" and "-Wl,-Lfoo" respectively.
5. Arguments of the form "-Wl,-L,foo" are converted to "-Lfoo".
6. Arguments of the form "-Wl,-rpath-link -Wl,foo" are converted to
the single argument form "-Wl,-rpath-link,foo".
7. Arguments of the form "-Rfoo", "-R foo", "-Wl,-Rfoo", "-Wl,-R -Wl,foo",
"-Wl,-rpath -Wl,foo" or "--Wl,-rpath -Wl,foo" are converted to the single
canonical argument form "-Wl,-rpath,foo". All -Wl,-rpath options with relative
path (e.g. not starting with /) are dropped.
8. Full path names that end up in
"/lib([a-zA-Z0-9_-])*\.s[ol](\.[0-9][^/]*)$ are replaced by "-Ldir -l\1"
with "dir" being the base name of the argument. This is not done for
arguments to -o, --dynamic-linker or -Wl,--dynamic-linker.
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