-Wl, --enable-new-dtags for DT_RUNPATH instead of DT_RPATH

Today by accident i had to deal with linker problems of some
software and found an issue that mentioned DT_RUNPATH, which
mentioned that DT_RPATH is legacy and searched for
$LD_LIBRARY_PATH, whereas the newer DT_RUNPATH is searched
thereafter.  Completely unencrypted!  Well.  For what's it worth,
i for one am astonished because of course i want to override
$LD_LIBRARY_PATH, but it surely has its merites, smart people came
to the conclusion, did they.

The attached diff below seems to be sufficient to support
DT_RUNPATH instead of DT_RPATH with tcc(1).  But i have no insight
in what --enable-new-dtags is supposed to change in addition, so
i wonder.

Ciao!

--steffen

 libtcc.c     | 2 ++
 tcc-doc.texi | 4 ++++
 tcc.h        | 1 +
 tccelf.c     | 3 ++-
 4 files changed, 9 insertions(+), 1 deletion(-)

tcc-doc.texi

@@ -307,6 +307,10 @@ Generate an object file combining all input files.
 @item -Wl,-rpath=path
 Put custom search path for dynamic libraries into executable.
 
+@item -Wl,--enable-new-dtags
+When putting a custom search path for dynamic libraries into the executable,
+create the new ELF dynamic tag DT_RUNPATH instead of the old legacy DT_RPATH.
+
 @item -Wl,--oformat=fmt
 Use @var{fmt} as output format. The supported output formats are:
 @table @code