[PATCH] elf: Delete obsoleted DISTINGUISH_LIB_VERSIONS

[Fangrui Song]

and its only definition in i386/dl-librecon.h which essentially
hasn't been updated since 2004.
---
 elf/rtld.c                                 |  4 ----
 sysdeps/unix/sysv/linux/i386/dl-librecon.h | 25 ----------------------
 2 files changed, 29 deletions(-)

diff --git a/elf/rtld.c b/elf/rtld.c
index d733359eaf..4196bae703 100644
--- a/elf/rtld.c
+++ b/elf/rtld.c
@@ -1637,10 +1637,6 @@ dl_main (const ElfW(Phdr) *phdr,
       if (main_map->l_ld == NULL)
 	_exit (1);
 
-      /* We allow here some platform specific code.  */
-#ifdef DISTINGUISH_LIB_VERSIONS
-      DISTINGUISH_LIB_VERSIONS;
-#endif
       _exit (has_interp ? 0 : 2);
     }
 
diff --git a/sysdeps/unix/sysv/linux/i386/dl-librecon.h b/sysdeps/unix/sysv/linux/i386/dl-librecon.h
index 7efe0679b3..e4d90529b8 100644
--- a/sysdeps/unix/sysv/linux/i386/dl-librecon.h
+++ b/sysdeps/unix/sysv/linux/i386/dl-librecon.h
@@ -21,31 +21,6 @@
 
 #include <sysdeps/unix/sysv/linux/dl-librecon.h>
 
-#define DISTINGUISH_LIB_VERSIONS \
-  do									      \
-    {									      \
-      /* We have to find out whether the binary is linked against	      \
-	 libc 5 or glibc.  We do this by looking at all the DT_NEEDED	      \
-	 entries.  If one is libc.so.5 this is a libc 5 linked binary.  */    \
-      if (main_map->l_info[DT_NEEDED])					      \
-	{								      \
-	  /* We have dependencies.  */					      \
-	  const ElfW(Dyn) *d;						      \
-	  const char *strtab;						      \
-									      \
-	  strtab = (const char *) D_PTR (main_map, l_info[DT_STRTAB]);	      \
-									      \
-	  for (d = main_map->l_ld; d->d_tag != DT_NULL; ++d)		      \
-	    if (d->d_tag == DT_NEEDED					      \
-		&& strcmp (strtab + d->d_un.d_val, "libc.so.5") == 0)	      \
-	      break;							      \
-									      \
-	  /* We print a `5' or `6' depending on the outcome.  */	      \
-	  _dl_printf (d->d_tag != DT_NULL ? "5\n" : "6\n");		      \
-	}								      \
-    }									      \
-  while (0)
-
 /* Recognizing extra environment variables.  */
 #define EXTRA_LD_ENVVARS \
   case 15:								      \
-- 
2.32.0.605.g8dce9f2422-goog