-# Specify the location of the archive containing PIC compiled object files.
-my $R = $^O eq 'Linux' ? "-Wl,--rpath -Wl," : "-R" ;
-my $librrd = "-L../../src/.libs/ $R\$(RPATH) -lrrd";
+# if the last argument when calling Makefile.PL is RPATH=/... and ... is the
+# path to librrd.so then the Makefile will be written such that RRDs.so knows
+# where to find librrd.so later on ...
+my $R="";
+if ($ARGV[-1] =~ /RPATH=(\S+)/){
+ pop @ARGV;
+ my $rp = $1;
+ for ($^O){
+ /linux/ && do{ $R = "-Wl,--rpath -Wl,$rp"};
+ /hpux/ && do{ $R = "+b$rp"};
+ /solaris/ && do{ $R = "-R$rp"};
+ /aix/ && do{ $R = "-Wl,-blibpath:$rp"};
+ }
+}
+
+# darwin works without this because librrd contains its
+# install_name which will includes the final location of the
+# library after it is installed. This install_name gets transfered
+# to the perl shared object.
+
+my $librrd = "-L../../src/.libs/ $R -lrrd";