I think you're out of luck with adding to LDDLFLAGS, but you could try setting 

WriteMakefile(
    ...
    dynamic_lib => { OTHERLDFLAGS => '-Wl,-rpath,/usr/local/dept/lib' 
+},
    ...
);

[download]

in Makefile.PL — which should achieve the same effect.  OTHERLDFLAGS is being inserted a little later on the linker command line, i.e.  $(LD)  $(LDDLFLAGS) $(LDFROM) $(OTHERLDFLAGS) -o $@ $(MYEXTLIB) ..., but that's not a problem, as it doesn't matter at which position the rpath option occurs.

In reply to Re: adding RPATH to Sybase.so by almut
in thread adding RPATH to Sybase.so by jklowden

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