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Multiple -rpaths

From: Jan Engelhardt
Subject: Multiple -rpaths
Date: Sun, 2 Nov 2008 17:24:27 +0100 (CET)
User-agent: Alpine 1.10 (LNX 962 2008-03-14)


I have two libraries in paths that are not searched by default (e.g. 
/opt/foo/lib). So I have this in my pkgconfig files:

foo.pc: Libs:   -L${libdir} -lfoo
bar.pc: Libs:   -L${libdir} -lbar

The linker will find -lfoo,-lbar and successfully create the output file 
-- which is an .la library --, but running `ldd` on it says 
" => not found", and that seems fine to me, since no -rpath 
was given. So I try to add -rpath in the pkgconfig files:

foo.pc: Libs:   -L${libdir} -rpath ${libdir} -lfoo
bar.pc: Libs:   -L${libdir} -rpath ${libdir} -lbar

Then unfortunately, libtool complains with

libtool: link: warning: ignoring multiple `-rpath's for a libtool 

The line is just:

baz_la_LDFLAGS = -avoid-version -module ${libfoo_LIBS} ${libbar_LIBS}

with ${lib*_LIBS} being mapped to the pkgconfig parts, respectively.

How would I achieve what I am trying here? (Possibly without using 
non-portable linker flags or workarounds like -Wl,-rpath,${libdir} -- I 
seem to remember Solaris ld does not like -rpath at all and wants -R 


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