diff options
Diffstat (limited to 'gcc/doc/cppopts.texi')
| -rw-r--r-- | gcc/doc/cppopts.texi | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/gcc/doc/cppopts.texi b/gcc/doc/cppopts.texi index dbc8f0e6e67..4b02a87cb8e 100644 --- a/gcc/doc/cppopts.texi +++ b/gcc/doc/cppopts.texi @@ -682,6 +682,14 @@ Like @samp{D}, but emit only the macro names, not their expansions. @opindex dI Output @samp{#include} directives in addition to the result of preprocessing. + +@item U +@opindex dU +Like @samp{D} except that only macros that are expanded, or whose +definedness is tested in preprocessor directives, are output; the +output is delayed until the use or test of the macro; and +@samp{#undef} directives are also output for macros tested but +undefined at the time. @end table @item -P |