Libraries updates and cleanup

* Updating common/lib
 * Updating lib/csu
 * Updating lib/libc
 * Updating libexec/ld.elf_so
 * Corrected test on __minix in featuretest to actually follow the
   meaning of the comment.
 * Cleaned up _REENTRANT-related defintions.
 * Disabled -D_REENTRANT for libfetch
 * Removing some unneeded __NBSD_LIBC defines and tests

Change-Id: Ic1394baef74d11b9f86b312f5ff4bbc3cbf72ce2

lib/csu/common_elf/Makefile.inc

@@ -6,11 +6,7 @@ ELFSIZE=32
 
 .include "../../Makefile.inc"
 
-.if defined(__MINIX) && ${MACHINE_ARCH} == "arm"
-CPPFLAGS+=	-DLIBC_SCCS -DPIC -DELFSIZE=${ELFSIZE}
-.else
 CPPFLAGS+=	-DLIBC_SCCS -DPIC -DDYNAMIC -DELFSIZE=${ELFSIZE}
-.endif
 CPPFLAGS+=	-I${NETBSDSRCDIR}/libexec/ld.elf_so
 CPPFLAGS+=	-I${.CURDIR}/../common_elf
 CPPFLAGS+=	-I${NETBSDSRCDIR}/lib/libc/dlfcn

lib/csu/common_elf/common.h

@@ -1,4 +1,4 @@
-/* $NetBSD: common.h,v 1.13 2009/12/14 01:04:02 matt Exp $ */
+/* $NetBSD: common.h,v 1.16 2012/03/21 10:09:20 matt Exp $ */
 
 /*
  * Copyright (c) 1995 Christopher G. Demetriou
@@ -68,11 +68,12 @@ do {						\
 static char	*_strrchr(char *, int);
 
 char	**environ;
-char	*__progname = "";
+char	*__progname = __UNCONST("");
 struct ps_strings *__ps_strings = 0;
 
 extern void	_init(void);
 extern void	_fini(void);
+extern void	_libc_init(void);
 
 #ifdef DYNAMIC
 void	_rtld_setup(void (*)(void), const Obj_Entry *obj);
@@ -83,7 +84,7 @@ void	_rtld_setup(void (*)(void), const Obj_Entry *obj);
  * if we happen to be compiling without -static but with without any
  * shared libs present, things will still work.
  */
-extern int _DYNAMIC __weak_reference(_DYNAMIC);
+__weakref_visible int rtld_DYNAMIC __weak_reference(_DYNAMIC);
 #endif /* DYNAMIC */
 
 #ifdef MCRT0