-m name Create a map file
-o name Name the default output file
-t sys Set the target system
+ -u sym Force an import of symbol `sym'
-v Verbose mode
-vm Verbose map file
--define sym=val Define a symbol
--dump-config name Dump a builtin configuration
--end-group End a library group
+ --force-import sym Force an import of symbol `sym'
--help Help (this text)
--lib file Link this library
--lib-path path Specify a library search path
supported.
+ <tag><tt>-u sym[:addrsize], --force-import sym[:addrsize]</tt></tag>
+
+ Force an import of a symbol. While object files are always linked to the
+ output file, regardless if there are any references, object modules from
+ libraries get only linked in if an import can be satisfied by this module.
+ The <tt/--fore-import/ option may be used to add a reference to a symbol and
+ as a result force linkage of the module that exports the identifier.
+
+ The name of the symbol may optionally be followed by a colon and an address
+ size specifier. If no address size is specified, the default address size
+ for the target machine is used.
+
+ Please note that the symbol name needs to have the internal representation,
+ meaning you have to prepend an underline for C identifiers.
+
+
<label id="option-v">
<tag><tt>-v, --verbose</tt></tag>
<item>A compiled in library path which is often <tt>/usr/lib/cc65/lib</tt> on
Linux systems.
<item>The value of the environment variable <tt/LD65_LIB/ if it is defined.
-<item>The value of the environment variable <tt/CC65_LIB/ if it is defined.
- Please note that use of this environment variable is obsolete and may
- get removed in future versions.
+<item>A subdirectory named <tt/lib/ of the directory defined in the environment
+ variable <tt/CC65_HOME/, if it is defined.
<item>Any directory added with the <tt><ref id="option--lib-path"
name="--lib-path"></tt> option on the command line.
</enum>
<enum>
<item>The current directory.
-<item>A compiled in directory which is often <tt>/usr/lib/cc65/lib</tt> on
+<item>A compiled in directory which is often <tt>/usr/lib/cc65/obj</tt> on
Linux systems.
<item>The value of the environment variable <tt/LD65_OBJ/ if it is defined.
-<item>The value of the environment variable <tt/CC65_LIB/ if it is defined.
- Please note that use of this environment variable is obsolete and may
- get removed in future versions.
+<item>A subdirectory named <tt/obj/ of the directory defined in the environment
+ variable <tt/CC65_HOME/, if it is defined.
<item>Any directory added with the <tt><ref id="option--obj-path"
name="--obj-path"></tt> option on the command line.
</enum>
<enum>
<item>The current directory.
-<item>A compiled in directory which is often <tt>/usr/lib/cc65/lib</tt> on
+<item>A compiled in directory which is often <tt>/usr/lib/cc65/cfg</tt> on
Linux systems.
<item>The value of the environment variable <tt/LD65_CFG/ if it is defined.
+<item>A subdirectory named <tt/cfg/ of the directory defined in the environment
+ variable <tt/CC65_HOME/, if it is defined.
<item>Any directory added with the <tt><ref id="option--cfg-path"
name="--cfg-path"></tt> option on the command line.
</enum>
<sect1>Builtin configurations<p>
-The builtin configurations are part of the linker source. They are also
-distributed together with the machine specific binary packages (usually in the
-doc directory) and don't have a special format. So if you need a special
-configuration, it's a good idea to start with the builtin configuration for
-your system. In a first step, just replace <tt/-t target/ by <tt/-C
+The builtin configurations are part of the linker source. They can be retrieved
+with <tt/--dump-config/ and don't have a special format. So if you need a
+special configuration, it's a good idea to start with the builtin configuration
+for your system. In a first step, just replace <tt/-t target/ by <tt/-C
configfile/. Then go on and modify the config file to suit your needs.
+<sect1>Secondary configurations<p>
+
+Several machine specific binary packages are distributed together with secondary
+configurations (in the cfg directory). These configurations can be used with
+<tt/-C configfile/ too.
+
+
+
<sect>Special segments<p>
The builtin config files do contain segments that have a special meaning for
and the libraries. It is placed in its own segment because it needs to be
loaded at the lowest possible program address on several platforms.
-<sect1>HEAP<p>
+<sect1>ZPSAVE<p>
-This segment defines the location of the memory heap used by the malloc
-routine.
+The ZPSAVE segment contains the original values of the zeropage locations used
+by the ZEROPAGE segment. It is placed in its own segment because it must not be
+initialized.