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| >Adding A New Board</H1 |
| ><P |
| >Adding a new board consists of creating a new board config |
| file. Examples are in |
| <TT |
| CLASS="FILENAME" |
| >dejagnu/baseboards</TT |
| >. Usually to make a new |
| board file, it's easiest to copy an existing one. It is also |
| possible to have your file be based on a |
| <I |
| CLASS="EMPHASIS" |
| >baseboard</I |
| > file with only one or two |
| changes needed. Typically, this can be as simple as just |
| changing the linker script. Once the new baseboard file is done, |
| add it to the <SPAN |
| CLASS="SYMBOL" |
| >boards_DATA</SPAN |
| > list in the |
| <TT |
| CLASS="FILENAME" |
| >dejagnu/baseboards/Makefile.am</TT |
| >, and regenerate the |
| Makefile.in using automake. Then just rebuild and install DejaGnu. You |
| can test it by:</P |
| ><P |
| >There is a crude inheritance scheme going on with board files, so |
| you can include one board file into another, The two main procedures used |
| to do this are <TT |
| CLASS="FUNCTION" |
| >load_generic_config</TT |
| > and |
| <TT |
| CLASS="FUNCTION" |
| >load_base_board_description</TT |
| >. The generic config file |
| contains other procedures used for a certain class of target. The |
| board description file is where the board specfic settings go. Commonly |
| there are similar target environments with just different |
| processors.</P |
| ><DIV |
| CLASS="EXAMPLE" |
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| ><B |
| >Example 6. Testing a New Board Config File</B |
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| > make check RUNTESTFLAGS="--target_board=<I |
| CLASS="EMPHASIS" |
| >newboardfile</I |
| >". |
| </PRE |
| ></TD |
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| ><P |
| >Here's an example of a board config file. There are |
| several <I |
| CLASS="EMPHASIS" |
| >helper procedures</I |
| > used in this |
| example. A helper procedure is one that look for a tool of files |
| in commonly installed locations. These are mostly used when |
| testing in the build tree, because the executables to be tested |
| are in the same tree as the new dejagnu files. The helper |
| procedures are the ones in square braces |
| <I |
| CLASS="EMPHASIS" |
| >[]</I |
| >, which is the Tcl execution characters.</P |
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| ><B |
| >Example 7. Example Board Config File</B |
| ></P |
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| > # Load the generic configuration for this board. This will define a basic |
| # set of routines needed by the tool to communicate with the board. |
| load_generic_config "sim" |
| |
| # basic-sim.exp is a basic description for the standard Cygnus simulator. |
| load_base_board_description "basic-sim" |
| |
| # The compiler used to build for this board. This has *nothing* to do |
| # with what compiler is tested if we're testing gcc. |
| set_board_info compiler "[find_gcc]" |
| |
| # We only support newlib on this target. |
| # However, we include libgloss so we can find the linker scripts. |
| set_board_info cflags "[newlib_include_flags] [libgloss_include_flags]" |
| set_board_info ldflags "[newlib_link_flags]" |
| |
| # No linker script for this board. |
| set_board_info ldscript "-Tsim.ld"; |
| |
| # The simulator doesn't return exit statuses and we need to indicate this. |
| set_board_info needs_status_wrapper 1 |
| |
| # Can't pass arguments to this target. |
| set_board_info noargs 1 |
| |
| # No signals. |
| set_board_info gdb,nosignals 1 |
| |
| # And it can't call functions. |
| set_board_info gdb,cannot_call_functions 1 |
| |
| </PRE |
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