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| <TITLE>Debugging Tips</TITLE> |
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| <H1>Debugging Tips</H1> |
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| <p> |
| Normally Mesa (and OpenGL) records but does not notify the user of |
| errors. It is up to the application to call |
| <code>glGetError</code> to check for errors. Mesa supports an |
| environment variable, MESA_DEBUG, to help with debugging. If |
| MESA_DEBUG is defined, a message will be printed to stdout whenever |
| an error occurs. |
| </p> |
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| <p> |
| More extensive error checking is done when Mesa is compiled with the |
| DEBUG symbol defined. You'll have to edit the Make-config file and |
| add -DDEBUG to the CFLAGS line for your system configuration. You may |
| also want to replace any optimization flags with the -g flag so you can |
| use your debugger. After you've edited Make-config type 'make clean' |
| before recompiling. |
| </p> |
| <p> |
| In your debugger you can set a breakpoint in _mesa_error() to trap Mesa |
| errors. |
| </p> |
| <p> |
| There is a display list printing/debugging facility. See the end of |
| src/dlist.c for details. |
| </p> |
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