diff options
Diffstat (limited to 'gcc/f/g77.texi')
| -rw-r--r-- | gcc/f/g77.texi | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/gcc/f/g77.texi b/gcc/f/g77.texi index 6b4b83f3be8..b799e6f7bb3 100644 --- a/gcc/f/g77.texi +++ b/gcc/f/g77.texi @@ -1539,7 +1539,7 @@ line being effectively commented out---unfortunate if that line is a non-comment line of important code! @emph{Note:} The @samp{-traditional} and @samp{-undef} flags are supplied -to @code{cpp} by default, to avoid unpleasant surprises. +to @code{cpp} by default, to help avoid unpleasant surprises. @xref{Preprocessor Options,,Options Controlling the Preprocessor, gcc,Using and Porting GNU CC}. This means that ANSI C preprocessor features (such as the @samp{#} @@ -1550,6 +1550,15 @@ Thus, if you want to do system-specific tests, use, for example, @samp{#ifdef __linux__} rather than @samp{#ifdef linux}. Use the @samp{-v} option to see exactly how the preprocessor is invoked. +@cindex /* +Unfortunately, the @samp{-traditional} flag will not avoid an error from +anything that @code{cpp} sees as an unterminated C comment, such as: +@smallexample +C Some Fortran compilers accept /* as starting +C an inline comment. +@end smallexample +@xref{Trailing Comment}. + The following options that affect overall processing are recognized by the @code{g77} and @code{gcc} commands in a GNU Fortran installation: @@ -6868,6 +6877,9 @@ continuation line, imitating the behavior of @code{f2c}. @node Trailing Comment @section Trailing Comment +@cindex trailing comment +@cindex comment, trailing +@cindex /* @code{g77} supports use of @samp{/*} to start a trailing comment. In the GNU Fortran language, @samp{!} is used for this purpose. @@ -6887,6 +6899,7 @@ error (though it would likely behave incorrectly). @node Debug Line @section Debug Line @cindex debug line +@cindex comment line, debug Use of @samp{D} or @samp{d} as the first character (column 1) of a source line denotes a debug line. |