-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(-)

tccelf.c

@@ -1968,7 +1968,8 @@ static int elf_output_file(TCCState *s1, const char *filename)
             }
 
             if (s1->rpath)
-                put_dt(dynamic, DT_RPATH, put_elf_str(dynstr, s1->rpath));
+                put_dt(dynamic, s1->enable_new_dtags ? DT_RUNPATH : DT_RPATH,
+                    put_elf_str(dynstr, s1->rpath));
 
             /* XXX: currently, since we do not handle PIC code, we
                must relocate the readonly segments */