The Target Makefile Fragment
============================

   The target makefile fragment, `t-TARGET', defines special target
dependent variables and targets used in the `Makefile':

`LIBGCC1'
     The rule to use to build `libgcc1.a'.  If your target does not
     need to use the functions in `libgcc1.a', set this to empty.
     See Interface.

`CROSS_LIBGCC1'
     The rule to use to build `libgcc1.a' when building a cross
     compiler.  If your target does not need to use the functions in
     `libgcc1.a', set this to empty.  See Cross Runtime.

`LIBGCC2_CFLAGS'
     Compiler flags to use when compiling `libgcc2.c'.

`LIB2FUNCS_EXTRA'
     A list of source file names to be compiled or assembled and
     inserted into `libgcc.a'.

`CRTSTUFF_T_CFLAGS'
     Special flags used when compiling `crtstuff.c'.  
See Initialization.

`MULTILIB_OPTIONS'
     For some targets, invoking GNU CC in different ways produces
     objects that can not be linked together.  For example, for some
     targets GNU CC produces both big and little endian code.  For
     these targets, you must arrange for multiple versions of
     `libgcc.a' to be compiled, one for each set of incompatible
     options.  When GNU CC invokes the linker, it arranges to link in
     the right version of `libgcc.a', based on the command line options
     used.

     The `MULTILIB_OPTIONS' macro lists the set of options for which
     special versions of `libgcc.a' must be built.  Write options that
     are mutually incompatible side by side, separated by a slash.
     Write options that may be used together separated by a space.  The
     build procedure will build all combinations of compatible options.

     For example, if you set `MULTILIB_OPTIONS' to `m68000/m68020
     msoft-float', `Makefile' will build special versions of `libgcc.a'
     using the options `-m68000', `-m68020', `-msoft-float', `-m68000
     -msoft-float', and `-m68020 -msoft-float'.

`MULTILIB_DIRNAMES'
     If `MULTILIB_OPTIONS' is used, this variable specifies the
     directory names that should be used to hold the various libraries.
     Write one element in `MULTILIB_DIRNAMES' for each element in
     `MULTILIB_OPTIONS'.  If `MULTILIB_DIRNAMES' is not used, the
     default value will be `MULTILIB_OPTIONS', with all slashes treated
     as spaces.

     For example, if `MULTILIB_OPTIONS' is `m68000/m68020 msoft-float',
     then the default value of `MULTILIB_DIRNAMES' is `m68000 m68020
     msoft-float'.  You may specify a different value if you desire a
     different set of directory names.

`MULTILIB_MATCHES'
     Sometimes the same option may be written in two different ways.
     If an option is listed in `MULTILIB_OPTIONS', GNU CC needs to know
     about any synonyms.  In that case, set `MULTILIB_MATCHES' to a
     list of items of the form `option=option' to describe all relevant
     synonyms.  For example, `m68000=mc68000 m68020=mc68020'.