Removing compiler warnings about unused portions of code.

Now unix.in uses absolute paths also to overcome problems with libtool.
To do that in a consistent way I had to modify the rules how to handle
$OBJ_DIR (and consequently $LIB_DIR): You should set $OBJ_DIR explicitly
on the command line (or environment).

builds/unix/unix.in

@@ -16,6 +16,7 @@
 ifndef TOP
   TOP := .
 endif
+TOP := $(shell cd $(TOP); pwd)
 
 DELETE        := @RMF@
 DELDIR        := @RMDIR@
@@ -57,15 +58,16 @@ version_info := @version_info@
 
 # The directory where all object files are placed.
 #
-# Note that this is not $(TOP)/obj!
 # This lets you build the library in your own directory with something like
 #
 #   set TOP=.../path/to/freetype2/top/dir...
-#   mkdir obj
+#   set OBJ_DIR=.../path/to/obj/dir
 #   make -f $TOP/Makefile setup [options]
 #   make -f $TOP/Makefile
 #
-OBJ_DIR := obj
+ifndef OBJ_DIR
+  OBJ_DIR := $(shell cd $(TOP)/obj; pwd)
+endif
 
 
 # The directory where all library files are placed.

src/truetype/ttgload.c

@@ -659,7 +659,11 @@
   FT_Error  load_truetype_glyph( TT_Loader*  loader,
                                  FT_UInt     glyph_index )
   {
+
+#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
     FT_Stream        stream = loader->stream;
+#endif
+
     FT_Error         error;
     TT_Face          face   = (TT_Face)loader->face;
     FT_ULong         offset;

src/truetype/ttobjs.c

@@ -61,12 +61,15 @@
 #define FT_COMPONENT  trace_ttobjs
 
 
+#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
+
   /*************************************************************************/
   /*                                                                       */
   /*                       GLYPH ZONE FUNCTIONS                            */
   /*                                                                       */
   /*************************************************************************/
 
+
   /*************************************************************************/
   /*                                                                       */
   /* <Function>                                                            */
@@ -141,6 +144,8 @@
     return error;
   }
 
+#endif /* TT_CONFIG_OPTION_BYTECODE_INTERPRETER */
+
 
   /*************************************************************************/
   /*                                                                       */

src/truetype/ttobjs.h

@@ -107,6 +107,8 @@
   } TT_GraphicsState;
 
 
+#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
+
   LOCAL_DEF void  TT_Done_GlyphZone( TT_GlyphZone*  zone );
 
   LOCAL_DEF FT_Error TT_New_GlyphZone( FT_Memory      memory,
@@ -114,6 +116,8 @@
                                        FT_Short       maxContours,
                                        TT_GlyphZone*  zone );
 
+#endif /* TT_CONFIG_OPTION_BYTECODE_INTERPRETER */
+
 
   /*************************************************************************/
   /*                                                                       */