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cpp.texi: Update.

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* cpp.texi: Update.
        * cppexp.c (parse_number): Update.
        * cpplex.c (parse_string): Pedwarn if multiline string does not
        result from a system header's macro.
        * cpplib.h (sys_objmacro_p): Rename sys_macro_p.
        * cppmacro.c (sys_objmacro_p): Rename sys_macro_p.  Return true
        for function-like macros too.
	* c-lex.c (parse_number): Update.

From-SVN: r40211
This commit is contained in:
Neil Booth 2001-03-03 11:32:32 +00:00 committed by Neil Booth
parent 4073aad5b5
commit c691145a65
7 changed files with 35 additions and 22 deletions
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11
gcc/ChangeLog
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@ -1,3 +1,14 @@
2001-03-03 Neil Booth <neil@daikokuya.demon.co.uk>
* cpp.texi: Update.
* cppexp.c (parse_number): Update.
* cpplex.c (parse_string): Pedwarn if multiline string does not
result from a system header's macro.
* cpplib.h (sys_objmacro_p): Rename sys_macro_p.
* cppmacro.c (sys_objmacro_p): Rename sys_macro_p. Return true
for function-like macros too.
* c-lex.c (lex_number): Update.
2001-03-03 Richard Henderson <rth@redhat.com>
* dwarf2out.c (output_call_frame_info): Fix augmentation length.

6
gcc/c-lex.c
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@ -1227,7 +1227,7 @@ lex_number (str, len)
if (fflag)
ERROR ("more than one 'f' suffix on floating constant");
else if (warn_traditional && !in_system_header
&& ! cpp_sys_objmacro_p (parse_in))
&& ! cpp_sys_macro_p (parse_in))
warning ("traditional C rejects the 'f' suffix");
fflag = 1;
@ -1237,7 +1237,7 @@ lex_number (str, len)
if (lflag)
ERROR ("more than one 'l' suffix on floating constant");
else if (warn_traditional && !in_system_header
&& ! cpp_sys_objmacro_p (parse_in))
&& ! cpp_sys_macro_p (parse_in))
warning ("traditional C rejects the 'l' suffix");
lflag = 1;
@ -1313,7 +1313,7 @@ lex_number (str, len)
if (spec_unsigned)
error ("two 'u' suffixes on integer constant");
else if (warn_traditional && !in_system_header
&& ! cpp_sys_objmacro_p (parse_in))
&& ! cpp_sys_macro_p (parse_in))
warning ("traditional C rejects the 'u' suffix");
spec_unsigned = 1;

24
gcc/cpp.texi
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@ -170,9 +170,9 @@ spaces, horizontal and vertical tabs, and form feeds between the
backslash and the subsequent newline. The preprocessor issues a
warning, but treats it as a valid escaped newline and combines the two
lines to form a single logical line. This works within comments and
tokens, including multi-line strings, as well as between tokens.
Comments are @emph{not} treated as whitespace for the purposes of this
relaxation, since they have not yet been replaced with spaces.
tokens, as well as between tokens. Comments are @emph{not} treated as
whitespace for the purposes of this relaxation, since they have not yet
been replaced with spaces.
@item
All comments are replaced with single spaces.
@ -216,8 +216,9 @@ bar"
@end example
is equivalent to @code{"foo\bar"}, not to @code{"foo\\bar"}. To avoid
having to worry about this, do not use the GNU extension which permits
multi-line strings. Instead, use string constant concatenation:
having to worry about this, do not use the deprecated GNU extension
which permits multi-line strings. Instead, use string literal
concatenation:
@example
"foo\\"
@ -3053,12 +3054,15 @@ used at all.
This pragma has been superseded by @samp{#pragma GCC poison}.
@xref{Poisoning}.
@item Multi-line string literals in directives
@item Multi-line string literals
The GNU C preprocessor currently allows newlines in string literals
within a directive. This is forbidden by the C standard and will
eventually be removed. (Multi-line string literals in open text are
still supported.)
The preprocessor currently allows raw newlines in string literals. This
extension is deprecated and will be removed in a future version of GCC.
The preprocessor already forbids such string literals in all directives
apart from #define.
Instead, make use of ISO C concatenation of adjacent string literals, or
use @samp{\n} followed by an escaped newline.
@item Preprocessing things which are not C

2
gcc/cppexp.c
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@ -205,7 +205,7 @@ parse_number (pfile, tok)
if (CPP_WTRADITIONAL (pfile)
&& sufftab[i].u
&& ! cpp_sys_objmacro_p (pfile))
&& ! cpp_sys_macro_p (pfile))
cpp_warning (pfile, "traditional C rejects the `U' suffix");
if (sufftab[i].l == 2 && CPP_OPTION (pfile, pedantic)
&& ! CPP_OPTION (pfile, c99))

8
gcc/cpplex.c
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@ -686,12 +686,10 @@ parse_string (pfile, token, terminator)
break;
}
if (! cpp_sys_macro_p (pfile))
cpp_pedwarn (pfile, "multi-line string constants are deprecated");
if (pfile->mlstring_pos.line == 0)
{
pfile->mlstring_pos = pfile->lexer_pos;
if (CPP_PEDANTIC (pfile))
cpp_pedwarn (pfile, "multi-line string constant");
}
pfile->mlstring_pos = pfile->lexer_pos;
handle_newline (buffer, c); /* Stores to read_ahead. */
c = '\n';

2
gcc/cpplib.h
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@ -605,7 +605,7 @@ extern void cpp_forall_identifiers PARAMS ((cpp_reader *,
extern void cpp_scan_buffer_nooutput PARAMS ((cpp_reader *, int));
extern void cpp_start_lookahead PARAMS ((cpp_reader *));
extern void cpp_stop_lookahead PARAMS ((cpp_reader *, int));
extern int cpp_sys_objmacro_p PARAMS ((cpp_reader *));
extern int cpp_sys_macro_p PARAMS ((cpp_reader *));
/* In cppfiles.c */
extern int cpp_included PARAMS ((cpp_reader *, const char *));

4
gcc/cppmacro.c
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@ -988,12 +988,12 @@ cpp_get_token (pfile, token)
defined in a system header. Just checks the macro at the top of
the stack. Used for diagnostic suppression. */
int
cpp_sys_objmacro_p (pfile)
cpp_sys_macro_p (pfile)
cpp_reader *pfile;
{
cpp_macro *macro = pfile->context->macro;
return macro && ! macro->fun_like && macro->syshdr;
return macro && macro->syshdr;
}
/* Read each token in, until EOF. Directives are transparently