diff -u bigforth-2.0.12/Makefile.in bigforth/Makefile.in
--- bigforth-2.0.12/Makefile.in	2004-04-14 19:36:44.000000000 +0200
+++ bigforth/Makefile.in	2004-12-07 14:12:45.578571000 +0100
@@ -18,7 +18,7 @@
 
 INSTDIR = $(prefix)/lib/bigforth
 BININSTDIR = $(prefix)/bin
-CC = @CC@
+CC = @CC@ @ARCHFLAGS@
 CP = cp
 MV = mv
 EXE = @EXEEXT@
Only in bigforth: Makefile.in~
Only in bigforth: autom4te.cache
Only in bigforth: bigforth
diff -u bigforth-2.0.12/bigforth.c bigforth/bigforth.c
--- bigforth-2.0.12/bigforth.c	2004-12-05 18:32:54.000000000 +0100
+++ bigforth/bigforth.c	2004-12-07 15:13:00.503618000 +0100
@@ -109,9 +109,10 @@
 #define OSFILE  int
 
 int bytes=0;
+static void* heapstart=(void*)0x10000000;
 
 #define available_mem(size)        (size=0x01000000)
-#define alloc_mem(size,heap)       (heap=(int *)mmap(0, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0))
+#define alloc_mem(size,heap)       (heap=(int *)mmap(heapstart, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0)); heapstart+=size;
 #define open_by_name(name,handle)  (handle=open(name, O_RDONLY))
 #define seek_to(handle,pos)        ({ long _pos = pos; if(bytes!=_pos) lseek(handle, _pos, SEEK_SET); bytes=_pos; })
 #define read_bytes(handle,to,size) (bytes+=read(handle, to, size))
diff -u bigforth-2.0.12/configure.in bigforth/configure.in
--- bigforth-2.0.12/configure.in	2004-07-17 18:45:56.000000000 +0200
+++ bigforth/configure.in	2004-12-07 14:12:33.247638000 +0100
@@ -8,21 +8,24 @@
 	*win32|cygwin)
 		EXTFLAGS="-mno-cygwin"
 		WINDOWS="-mwindows"
+		ARCHFLAGS=""
 		;;
 	*)
 		EXTFLAGS=""
 		WINDOWS=""
+		ARCHFLAGS=""
 		;;
 esac
 
 case "$host_cpu" in
 	*x86_64*)
-		EXTFLAGS="-m32"
+		ARCHFLAGS="-m32"
 		;;
 esac
 
 AC_CHECK_LIB(dl,dlopen)
 AC_SUBST(EXTFLAGS)
+AC_SUBST(ARCHFLAGS)
 AC_SUBST(WINDOWS)
 
 AC_OUTPUT(Makefile bigforth.cnf xbigforth.cnf)
diff -u bigforth-2.0.12/png.fs bigforth/png.fs
--- bigforth-2.0.12/png.fs	2004-07-26 22:51:07.000000000 +0200
+++ bigforth/png.fs	2004-12-07 15:14:28.490256000 +0100
@@ -2,7 +2,7 @@
 
 also DOS
 
-library libpng libpng.so.2
+library libpng libpng.so.3
 
 legacy off
 
@@ -28,7 +28,7 @@
     THEN r> ;
 
 : init-png ( -- infostruc readstruc )
-    0" 1.0.15" user_error_ptr ['] noop dup png_create_read_struct
+    0" 1.2.0" user_error_ptr ['] noop dup png_create_read_struct
     dup 0= abort" PNG: no read structure"
     info-struct dup setjmp IF
         dup png_destroy_read_struct