(output_line_directive): Do not output negative line numbers when

[pf3gnuchains/gcc-fork.git] / gcc / cpp.texi

diff --git a/gcc/cpp.texi b/gcc/cpp.texi
index c74b4b2..dd26942 100644 (file)
--- a/gcc/cpp.texi
+++ b/gcc/cpp.texi
@@ -974,14 +974,14 @@ but in the @samp{m68k-coff} environment it expands to the string
 
 @item __USER_LABEL_PREFIX__
 @findex __USER_LABEL_PREFIX__
-This macro expands to a string describing the prefix applied to
-user generated labels in assembler code.  It can be used to write
-assembler code that is usable in multiple environments.
-For example, in the @samp{m68k-aout} environment it expands to the
-string @samp{"_"}, but in the @samp{m68k-coff} environment it expands
-to the string @samp{""}.
-This does not work with the -mno-underscores option that the i386/osfrose
-and m88k targets provide, and not with the -mcall* options of rs6000/sysv4 .
+This macro expands to a string describing the prefix applied to user
+generated labels in assembler code.  It can be used to write assembler
+code that is usable in multiple environments.  For example, in the
+@samp{m68k-aout} environment it expands to the string @samp{"_"}, but in
+the @samp{m68k-coff} environment it expands to the string @samp{""}.
+This does not work with the @samp{-mno-underscores} option that the
+i386 OSF/rose and m88k targets provide nor with the @samp{-mcall*} options
+of the rs6000 System V Release 4 target.
 @end table
 
 @node Nonstandard Predefined,, Standard Predefined, Predefined
@@ -2330,7 +2330,7 @@ when you run @code{gcc} or @code{cpp}.  @xref{Invocation}.
 @findex #error
 The directive @samp{#error} causes the preprocessor to report a fatal
 error.  The rest of the line that follows @samp{#error} is used as the
-error message.
+error message.  The line must consist of complete tokens.
 
 You would use @samp{#error} inside of a conditional that detects a
 combination of parameters which you know the program does not properly
@@ -2340,7 +2340,7 @@ properly on a Vax, you might write
 @smallexample
 @group
 #ifdef __vax__
-#error Won't work on Vaxen.  See comments at get_last_object.
+#error "Won't work on Vaxen.  See comments at get_last_object."
 #endif
 @end group
 @end smallexample
@@ -2818,9 +2818,10 @@ is applied to the standard system directories.
 @findex -lang-objc++
 Specify the source language.  @samp{-lang-c} is the default; it
 allows recognition of C++ comments (comments that begin with
-@samp{//} and end at end of line), since this is
-a common feature and it will most likely be in the next C standard.
-@samp{-lang-c89} disables recognition of C++ comments.  @samp{-lang-c++}
+@samp{//} and end at end of line) and hexadecimal floating-point constants,
+since these features will most likely appear in the next C standard.
+@samp{-lang-c89} disables recognition of C++ comments and
+hexadecimal floating-point constants.  @samp{-lang-c++}
 handles C++ comment syntax and includes extra default include
 directories for C++.  @samp{-lang-objc} enables the Objective C
 @samp{#import} directive.  @samp{-lang-objc++} enables both C++ and Objective C