--- /dev/null	2010-02-24 16:09:00.000000000 +1100
 +++ patches/patch-bc	2010-02-24 16:06:47.000000000 +1100
 @@ -0,0 +1,94 @@
 +$NetBSD: patch-bc,v  Exp $
 +
 +--- Src/exec.c.orig	2007-12-11 20:35:25.000000000 +1100
 ++++ Src/exec.c	2010-02-24 16:05:40.000000000 +1100
 +@@ -1734,17 +1734,17 @@
 + 	int l = strlen(str) + 1, nl = (l + 31) & ~31;
 + 
 + 	if (nl > underscorelen || (underscorelen - nl) > 64) {
 +-	    zfree(underscore, underscorelen);
 +-	    underscore = (char *) zalloc(underscorelen = nl);
 ++	    zfree(zunderscore, underscorelen);
 ++	    zunderscore = (char *) zalloc(underscorelen = nl);
 + 	}
 +-	strcpy(underscore, str);
 ++	strcpy(zunderscore, str);
 + 	underscoreused = l;
 +     } else {
 + 	if (underscorelen > 128) {
 +-	    zfree(underscore, underscorelen);
 +-	    underscore = (char *) zalloc(underscorelen = 32);
 ++	    zfree(zunderscore, underscorelen);
 ++	    zunderscore = (char *) zalloc(underscorelen = 32);
 + 	}
 +-	*underscore = '\0';
 ++	*zunderscore = '\0';
 + 	underscoreused = 1;
 +     }
 + }
 +@@ -3767,7 +3767,7 @@
 +     int cont;
 +     VARARR(char, ou, underscoreused);
 + 
 +-    memcpy(ou, underscore, underscoreused);
 ++    memcpy(ou, zunderscore, underscoreused);
 + 
 +     while (wrap) {
 + 	wrap->module->wrapper++;
 +@@ -3995,7 +3995,7 @@
 +     es->trapreturn = trapreturn;
 +     es->noerrs = noerrs;
 +     es->subsh_close = subsh_close;
 +-    es->underscore = ztrdup(underscore);
 ++    es->underscore = ztrdup(zunderscore);
 +     es->next = exstack;
 +     exstack = es;
 +     noerrs = cmdoutpid = 0;
 +
 +--- Src/init.c.orig	2007-11-26 20:38:49.000000000 +1100
 ++++ Src/init.c	2010-02-24 16:04:52.000000000 +1100
 +@@ -42,7 +42,7 @@
 + /* buffer for $_ and its length */
 + 
 + /**/
 +-char *underscore;
 ++char *zunderscore;
 + 
 + /**/
 + int underscorelen, underscoreused;
 +@@ -773,9 +773,9 @@
 +     ifs         = ztrdup(DEFAULT_IFS);
 +     wordchars   = ztrdup(DEFAULT_WORDCHARS);
 +     postedit    = ztrdup("");
 +-    underscore  = (char *) zalloc(underscorelen = 32);
 ++    zunderscore  = (char *) zalloc(underscorelen = 32);
 +     underscoreused = 1;
 +-    *underscore = '\0';
 ++    *zunderscore = '\0';
 + 
 +     zoptarg = ztrdup("");
 +     zoptind = 1;
 +
 +--- Src/params.c.orig	2007-11-29 21:15:18.000000000 +1100
 ++++ Src/params.c	2010-02-24 16:04:52.000000000 +1100
 +@@ -3347,7 +3347,7 @@
 + char *
 + underscoregetfn(UNUSED(Param pm))
 + {
 +-    char *u = dupstring(underscore);
 ++    char *u = dupstring(zunderscore);
 + 
 +     untokenize(u);
 +     return u;
 +
 +--- Src/utils.c.orig	2007-12-11 20:35:25.000000000 +1100
 ++++ Src/utils.c	2010-02-24 16:04:52.000000000 +1100
 +@@ -807,7 +807,7 @@
 + 		} else {
 + 		    VARARR(char, usav, underscoreused);
 + 
 +-		    memcpy(usav, underscore, underscoreused);
 ++		    memcpy(usav, zunderscore, underscoreused);
 + 
 + 		    setunderscore(*s);
 +