--- gforth/configure.in	2008/08/16 16:58:35	1.240
+++ gforth/configure.in	2008/10/12 13:15:23	1.251
@@ -20,12 +20,12 @@ dnl Process this file with autoconf to p
 
 dnl We use some automake macros here,
 dnl but don't use automake for creating Makefile.in
-AC_INIT([gforth],[0.6.9-20080716],[https://savannah.gnu.org/bugs/?func=addbug&group=gforth])
+AC_INIT([gforth],[0.6.9-20081006],[https://savannah.gnu.org/bugs/?func=addbug&group=gforth])
 AC_PREREQ(2.54)
 #snapshots have numbers major.minor.release-YYYYMMDD
 #note that lexicographic ordering must be heeded.
 #I.e., 0.4.1-YYYYMMDD must not exist before 0.4.1!
-UPDATED="July 16, 2008"
+UPDATED="October 10, 2008"
 AC_SUBST(UPDATED)
 AC_CONFIG_HEADERS(engine/config.h)
 
@@ -124,6 +124,7 @@ AC_ARG_VAR(condbranch_opt, [enable (1) o
 AC_ARG_VAR(skipcode, [assembly code for skipping 16 bytes of code])
 AC_ARG_VAR(asmcomment, [assembler comment start string])
 AC_ARG_VAR(arm_cacheflush, [file containing ARM cacheflush function (without .c)])
+AC_ARG_VAR(LTDL_LIBRARY_PATH, [additional directories for libltdl (for some 64-bit platforms)])
 
 #set up feature test macros, so the tests get them right:
 # turn on all POSIX, SUSv3, and GNU features if available
@@ -617,7 +618,6 @@ 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 +666,17 @@ case "$host_os" in
 		DIRSEP="/"
 		PATHSEP=":"
 		DEFAULTSYSTEMPREFIX=""
+                #the following magic value was suggested by
+                #http://mail.python.org/pipermail/pythonmac-sig/2005-October/015190.html
+                AC_DEFINE_UNQUOTED(MACOSX_DEPLOYMENT_TARGET,"10.3",[an environment variable value needed by libtool on some MacOS X versions])
+		;;
+	*linux*)
+		DIRSEP="/"
+		PATHSEP=":"
+		DEFAULTSYSTEMPREFIX=""
+		if test -z "$LTDL_LIBRARY_PATH" -a "$wordsize" = 64; then
+		   LTDL_LIBRARY_PATH=`/sbin/ldconfig -p |tail -n +2 |sed 's/^.* => //'|sed 's|/[^/]*$||'| grep 64 | sort -u | tr '[\n]' [:] | sed -e 's/:$//'`
+		fi
 		;;
 	*)
 		DIRSEP="/"
@@ -679,6 +690,9 @@ AC_SUBST(PATHSEP)
 AC_DEFINE_UNQUOTED(PATHSEP,'$PATHSEP',[a path separator character])
 AC_SUBST(DEFAULTSYSTEMPREFIX)
 AC_DEFINE_UNQUOTED(DEFAULTSYSTEMPREFIX,"$DEFAULTSYSTEMPREFIX",[default for environment variable GFORTHSYSTEMPREFIX])
+if test -n "$LTDL_LIBRARY_PATH"; then
+   AC_DEFINE_UNQUOTED(LTDL_LIBRARY_PATH,"$LTDL_LIBRARY_PATH",[Define LTDL_LIBRARY_PATH for 64 bit Linux])
+fi                                                                
 
 #work around SELinux brain damage (from Andrew Haley <12t8f3jakb74g2c@news.supernews.com>)
 #This magic incantation  seems to be completely undocumented.
@@ -817,7 +831,7 @@ if test -z "$FFI_H_NAME"; then
 fi
 AC_SUBST(FFI_H_NAME)
 AC_CHECK_LIB(ffi,ffi_call)
-if test $ac_cv_lib_ffi_ffi_call = yes
+if test -n "$FFI_H_NAME" -a $ac_cv_lib_ffi_ffi_call = yes
 then
   LIBFFIFLAG="true"
   LIBCC_BUILD_SRC="$LIBCC_BUILD_SRC libffi.fs"
@@ -856,7 +870,7 @@ 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)