--- configure.orig	2025-04-29 23:04:51
+++ configure	2025-04-29 23:14:56
@@ -1233,7 +1233,7 @@
 	macos*|darwin|rhapsody)
 		OS="macosx"
 		SYS="macosx"
-		os_v=`perl -e '{open(F, "< /System/Library/CoreServices/SystemVersion.plist") or exit(2); my ($doc) = ""; my ($line); while (defined($line = <F>)) { $doc .= $line; } close(F); $doc =~ s/\s+//gs; if ($doc =~ /<key>ProductVersion<\/key><string>([^<]+)<\/string>/) { print , "\n"; exit(0); } exit(1); }' 2>/dev/null`
+		os_v=`perl -e '{open(F, "< /System/Library/CoreServices/SystemVersion.plist") or exit(2); my ($doc) = ""; my ($line); while (defined($line = <F>)) { $doc .= $line; } close(F); $doc =~ s/\s+//gs; if ($doc =~ /<key>ProductVersion<\/key><string>([^<]+)<\/string>/) { print $1, "\n"; exit(0); } exit(1); }' 2>/dev/null`
 		if [ "$os_v" = "" ] && [ -x "$HOME/bin/macosver" ] ; then
 			os_v=`"$HOME/bin/macosver" 2>/dev/null`
 		fi
@@ -1763,6 +1763,7 @@
 #line 1764 "configure"
 #include "confdefs.h"
 #include <ctype.h>
+#include <stdlib.h>
 #define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
 #define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c))
 #define XOR(e, f) (((e) && !(f)) || (!(e) && (f)))
@@ -2545,6 +2546,7 @@
 #include <sys/uio.h>
 #include <sys/socket.h>
 #include <sys/un.h>
+#include <string.h>
 
 int main(void) {
 
@@ -7711,7 +7713,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 	/* If setvbuf has the reversed format, exit 0. */
-	main () {
+	int main () {
 	  /* This call has the arguments reversed.
 	     A reversed system may check and see that the address of main
 	     is not _IOLBF, _IONBF, or _IOFBF, and return nonzero.  */