diff options
Diffstat (limited to 'gcc/doc/cppopts.texi')
| -rw-r--r-- | gcc/doc/cppopts.texi | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/gcc/doc/cppopts.texi b/gcc/doc/cppopts.texi index 6fb3b53..24c6edd 100644 --- a/gcc/doc/cppopts.texi +++ b/gcc/doc/cppopts.texi @@ -110,6 +110,16 @@ Warn whenever an identifier which is not a macro is encountered in an @samp{#if} directive, outside of @samp{defined}. Such identifiers are replaced with zero. +@item -Wunused-macros +@opindex Wunused-macros +Warn about macros defined in the main file that are unused. A macro +is @dfn{used} if it is expanded or tested for existence at least once. +The preprocessor will also warn if the macro has not been used at the +time it is redefined or undefined. + +Built-in macros, macros defined on the command line, and macros +defined in include files are not warned about. + @item -Wendif-labels @opindex Wendif-labels Warn whenever an @samp{#else} or an @samp{#endif} are followed by text. |