--- gforth/configure.in	2008/08/19 13:59:00	1.241
+++ gforth/configure.in	2008/08/19 20:18:58	1.244
@@ -617,7 +617,6 @@ else
  M4=m4
 fi
 AC_SUBST(M4)
-AC_DEFINE_UNQUOTED(M4,"$M4",[How to invoke m4])
 AC_MSG_RESULT($M4)
 
 # Find installed Gforth
@@ -666,6 +665,9 @@ case "$host_os" in
 		DIRSEP="/"
 		PATHSEP=":"
 		DEFAULTSYSTEMPREFIX=""
+                #the following magic value was suggested by
+                #http://mail.python.org/pipermail/pythonmac-sig/2005-October/015190.html
+                AC_DEFINE_UNQUOTED(MACOSX_DEPLOYMENT_TARGET,"10.3",[an environment variable value needed by libtool on some MacOS X versions])
 		;;
 	*)
 		DIRSEP="/"
@@ -856,7 +858,7 @@ AC_CHECK_FUNCS(expm1 log1p)
 AC_REPLACE_FUNCS(rint ecvt)
 dnl No check for select, because our replacement is no good under
 dnl anything but DOS
-AC_CHECK_HEADERS(sys/mman.h fnmatch.h)
+AC_CHECK_HEADERS(sys/mman.h fnmatch.h alloca.h)
 AC_FUNC_FNMATCH
 test $ac_cv_func_fnmatch_works = yes || AC_LIBOBJ(fnmatch)
 AC_CHECK_FUNCS(mmap sysconf getpagesize)