elf: Implement ld.so --version

This prints out version information for the dynamic loader and
exits immediately, without further command line processing
(which seems to match what some GNU tools do).

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/elf/dl-main.h b/elf/dl-main.h
index ac7249a580..b51256d3b4 100644
--- a/elf/dl-main.h
+++ b/elf/dl-main.h
@@ -105,6 +105,9 @@ call_init_paths (const struct dl_main_state *state)
 _Noreturn void _dl_usage (const char *argv0, const char *wrong_option)
   attribute_hidden;
 
+/* Print ld.so version information and exit.  */
+_Noreturn void _dl_version (void) attribute_hidden;
+
 /* Print ld.so --help output and exit.  */
 _Noreturn void _dl_help (const char *argv0, struct dl_main_state *state)
   attribute_hidden;