When : when building perl bindings. Without this patch, it does not take care of LDFLAGS.
Why : It is required if you want to customize your own LDFLAGS, example : for hardening
Upstream : https://www.prelude-siem.org/issues/761 It should be added in the next version of Prelude.
--- a/bindings/perl/Makefile.PL.in
+++ b/bindings/perl/Makefile.PL.in
@@ -27,7 +27,7 @@
 my %attributs = (NAME => 'Prelude',
 		 INC => '-I@top_builddir@ -I@top_builddir@/src/include -I@top_srcdir@/src/include -I@top_builddir@/src/libprelude-error -I@top_srcdir@/bindings/c++/include',
 		 LIBS => ["-L@top_builddir@/src/.libs -lprelude -L@top_builddir@/bindings/c++/.libs -lpreludecpp", "-L$ENV{LIBDIR} -lprelude @LIBPRELUDE_LIBS@ @LIBADD_DL@ @LTLIBTHREAD@" ],
-		 LDDLFLAGS => "-L@top_builddir@/src/.libs $Config{lddlflags}");
+		 LDDLFLAGS => "-L@top_builddir@/src/.libs $Config{lddlflags} @LDFLAGS@,-rpath");
 
 if ( abs_path("@top_srcdir@") ne abs_path("@top_builddir@") ) {
     foreach my $filename ( qw/Prelude.cxx Prelude.pm/ ) {