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(gcc-295.info)File Names and DBX

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File Names in DBX Format
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   This describes file names in DBX format.

`DBX_WORKING_DIRECTORY'
     Define this if DBX wants to have the current directory recorded in
     each object file.

     Note that the working directory is always recorded if GDB
     extensions are enabled.

`DBX_OUTPUT_MAIN_SOURCE_FILENAME (STREAM, NAME)'
     A C statement to output DBX debugging information to the stdio
     stream STREAM which indicates that file NAME is the main source
     file--the file specified as the input file for compilation.  This
     macro is called only once, at the beginning of compilation.

     This macro need not be defined if the standard form of output for
     DBX debugging information is appropriate.

`DBX_OUTPUT_MAIN_SOURCE_DIRECTORY (STREAM, NAME)'
     A C statement to output DBX debugging information to the stdio
     stream STREAM which indicates that the current directory during
     compilation is named NAME.

     This macro need not be defined if the standard form of output for
     DBX debugging information is appropriate.

`DBX_OUTPUT_MAIN_SOURCE_FILE_END (STREAM, NAME)'
     A C statement to output DBX debugging information at the end of
     compilation of the main source file NAME.

     If you don't define this macro, nothing special is output at the
     end of compilation, which is correct for most machines.

`DBX_OUTPUT_SOURCE_FILENAME (STREAM, NAME)'
     A C statement to output DBX debugging information to the stdio
     stream STREAM which indicates that file NAME is the current source
     file.  This output is generated each time input shifts to a
     different source file as a result of `#include', the end of an
     included file, or a `#line' command.

     This macro need not be defined if the standard form of output for
     DBX debugging information is appropriate.