libc and csu updates for ELF

lib/csu/i386-elf/crt1_c.c

@@ -54,6 +54,8 @@ extern int etext;
 char **environ;
 const char *__progname = "";
 
+char ***_penviron;
+
 __dead void _start1(fptr, int, char *[]);
 
 /* The entry function, C part. */
@@ -63,6 +65,8 @@ _start1(fptr cleanup, int argc, char *argv[])
 	char **env;
 	const char *s;
 
+	_penviron = &environ;
+
 	env = argv + argc + 1;
 	environ = env;
 	if (argc > 0 && argv[0] != NULL) {

lib/libc/other/getprogname.c

@@ -44,6 +44,28 @@ __RCSID("$NetBSD: getprogname.c,v 1.3 2003/07/26 19:24:42 salo Exp $");
 #include <stdlib.h>
 #include <string.h>
 
+#if defined(__ELF__)
+extern const char *__progname;
+
+const char *
+getprogname(void)
+{
+
+        return (__progname);
+}
+
+void
+setprogname(const char *progname)
+{
+        const char *p;
+
+        p = strrchr(progname, '/');
+        if (p != NULL)
+                __progname = p + 1;
+        else
+                __progname = progname;
+}
+#else
 static const char *theprogname = NULL;
 extern const char **__prognamep;	/* Copy of argv[]. */
 extern int __argc;			/* Copy of argc. */
@@ -69,3 +91,4 @@ setprogname(const char *newprogname)
 {
 	theprogname = newprogname;
 }
+#endif