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Diffstat (limited to 'gcc/doc/cppopts.texi')
| -rw-r--r-- | gcc/doc/cppopts.texi | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/gcc/doc/cppopts.texi b/gcc/doc/cppopts.texi index 5958abde263..68bd43902ad 100644 --- a/gcc/doc/cppopts.texi +++ b/gcc/doc/cppopts.texi @@ -527,6 +527,19 @@ For example, comments appearing at the start of what would be a directive line have the effect of turning that line into an ordinary source line, since the first token on the line is no longer a @samp{#}. +@item -CC +Do not discard comments, including during macro expansion. This is +like @option{-C}, except that comments contained within macros are +also passed through to the output file where the macro is expanded. + +In addition to the side-effects of the @option{-C} option, the +@option{-CC} option causes all C++-style comments inside a macro +to be converted to C-style comments. This is to prevent later use +of that macro from inadvertently commenting out the remainer of +the source line. + +The @option{-CC} option is generally used to support lint comments. + @item -gcc @opindex gcc Define the macros @sc{__gnuc__}, @sc{__gnuc_minor__} and |