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Diffstat (limited to 'gdb/doc/gdb.texinfo')
| -rw-r--r-- | gdb/doc/gdb.texinfo | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo index 7ae9e1c..57bd084 100644 --- a/gdb/doc/gdb.texinfo +++ b/gdb/doc/gdb.texinfo @@ -8382,7 +8382,7 @@ can be any string of tokens. @cindex definition, showing a macro's @item info macro @var{macro} Show the definition of the macro named @var{macro}, and describe the -source location where that definition was established. +source location or compiler command-line where that definition was established. @kindex macro define @cindex user-defined macros @@ -8547,6 +8547,18 @@ $2 = 0 (@value{GDBP}) @end smallexample +In addition to source files, macros can be defined on the compilation command +line using the @option{-D@var{name}=@var{value}} syntax. For macros defined in +such a way, @value{GDBN} displays the location of their definition as line zero +of the source file submitted to the compiler. + +@smallexample +(@value{GDBP}) info macro __STDC__ +Defined at /home/jimb/gdb/macros/play/sample.c:0 +-D__STDC__=1 +(@value{GDBP}) +@end smallexample + @node Tracepoints @chapter Tracepoints |