Fwd: Re: Fix for --as-needed
matz at kde.org
Mon Nov 22 13:44:31 GMT 2004
On Sun, 21 Nov 2004, Thiago Macieira wrote:
> My solution consists in:
> 1) adding the --enable-new-dtags flag to the linker, if supported. This
> makes GNU ld emit RUNPATH directives as well as RPATH. The consequence is
> a) RPATH is ignored
> b) RUNPATH is overrideable by LD_LIBRARY_PATH at run-time
> 2) making libtool's stub script use LD_LIBRARY_PATH as well as relinking.
This should do no harm. It changes a bit the way how you can call the
lt-* binary. After calling the script once it was self-contained (i.e.
contained all relevant RPATHs), so it was possible to call the lt-* binary
directly. Now you really have to go through the script for setting
> These two changes make the correct library be loaded.
> 3) make the --as-needed flag usage default to yes only if
> --enable-new-dtags is present as well
I don't like this. The reason is, that some ld's (well, yes, SuSE's
binutils) have this active by default. On those it works without the
flag. I would expect that somewhen the default for using the new dtags
will be switched globally. So the dependency of as-needed on new-dtags
should not be strict.
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