From fcce57564b63a66c86bdbc3a47a55092e9c0f531 Mon Sep 17 00:00:00 2001 From: Jeffrey A Law Date: Mon, 28 Sep 1998 03:14:40 +0000 Subject: [PATCH] * cpp.texi: Update for Fortran usage from Craig. From-SVN: r22613 --- gcc/ChangeLog | 4 ++++ gcc/cpp.texi | 50 +++++++++++++++++++++++++++++++++++++++++++++----- 2 files changed, 49 insertions(+), 5 deletions(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 62c224b5913..6a94c26d129 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,7 @@ +Mon Sep 28 04:11:35 1998 Jeffrey A Law (law@cygnus.com) + + * cpp.texi: Update for Fortran usage from Craig. + Fri Sep 25 22:09:47 1998 David Edelsohn * rs6000.c (function_arg_boundary): Revert accidental change on diff --git a/gcc/cpp.texi b/gcc/cpp.texi index e71b6e91fe0..c81554b6a92 100644 --- a/gcc/cpp.texi +++ b/gcc/cpp.texi @@ -42,7 +42,7 @@ into another language, under the above conditions for modified versions. @titlepage @c @finalout @title The C Preprocessor -@subtitle Last revised March 1997 +@subtitle Last revised September 1998 @subtitle for GCC version 2 @author Richard M. Stallman @page @@ -51,8 +51,8 @@ This booklet is eventually intended to form the first chapter of a GNU C Language manual. @vskip 0pt plus 1filll -Copyright @copyright{} 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997 Free -Software Foundation, Inc. +Copyright @copyright{} 1987, 1989, 1991-1998 +Free Software Foundation, Inc. Permission is granted to make and distribute verbatim copies of this manual provided the copyright notice and this permission notice @@ -2594,6 +2594,46 @@ Traditionally, @samp{\} inside a macro argument suppresses the syntactic significance of the following character. @end itemize +@cindex Fortran +@cindex unterminated +Use the @samp{-traditional} option when preprocessing Fortran code, +so that singlequotes and doublequotes +within Fortran comment lines +(which are generally not recognized as such by the preprocessor) +do not cause diagnostics +about unterminated character or string constants. + +However, this option does not prevent diagnostics +about unterminated comments +when a C-style comment appears to start, but not end, +within Fortran-style commentary. + +So, the following Fortran comment lines are accepted with +@samp{-traditional}: + +@smallexample +C This isn't an unterminated character constant +C Neither is "20000000000, an octal constant +C in some dialects of Fortran +@end smallexample + +However, this type of comment line will likely produce a diagnostic, +or at least unexpected output from the preprocessor, +due to the unterminated comment: + +@smallexample +C Some Fortran compilers accept /* as starting +C an inline comment. +@end smallexample + +@cindex g77 +Note that @code{g77} automatically supplies +the @samp{-traditional} option +when it invokes the preprocessor. +However, a future version of @code{g77} +might use a different, more-Fortran-aware preprocessor +in place of @code{cpp}. + @item -trigraphs @findex -trigraphs Process ANSI standard trigraph sequences. These are three-character @@ -2778,8 +2818,8 @@ Like @samp{-M} but the dependency information is written to @var{file}. This is in addition to compiling the file as specified---@samp{-MD} does not inhibit ordinary compilation the way @samp{-M} does. -When invoking gcc, do not specify the @var{file} argument. -Gcc will create file names made by replacing ".c" with ".d" at +When invoking @code{gcc}, do not specify the @var{file} argument. +@code{gcc} will create file names made by replacing ".c" with ".d" at the end of the input file names. In Mach, you can use the utility @code{md} to merge multiple dependency -- 2.30.2