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[taken from gcc-2.95.3-7-suse]

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save/restore warnings during the use of __extension__


git-svn-id: file:///srv/svn/repos/haiku/trunk/buildtools@9583 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Oliver Tappe 2004-10-28 18:19:43 +00:00
parent a20bf576e7
commit 288e868d9b
2 changed files with 20 additions and 7 deletions
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24
gcc/gcc/c-parse.in
View File

@ -205,6 +205,8 @@ end ifc
%type <ttype> parmlist_or_identifiers parmlist_or_identifiers_1
%type <ttype> identifiers_or_typenames
%type <itype> extension
%type <itype> setspecs
%type <ends_in_label> lineno_stmt_or_label lineno_stmt_or_labels stmt_or_label
@ -247,6 +249,15 @@ static tree declspec_stack;
/* 1 if we explained undeclared var errors. */
static int undeclared_variable_notice;
/* For __extension__, save/restore the warning flags which are
controlled by __extension__. */
#define SAVE_WARN_FLAGS() (pedantic | (warn_pointer_arith << 1))
#define RESTORE_WARN_FLAGS(val) \
do { \
pedantic = val & 1; \
warn_pointer_arith = (val >> 1) & 1; \
} while (0)
ifobjc
/* Objective-C specific information */
@ -307,7 +318,7 @@ end ifobjc
else
error ("argument of `asm' is not a constant string"); }
| extension extdef
{ pedantic = $<itype>1; }
{ RESTORE_WARN_FLAGS ($1); }
;
datadef:
@ -448,7 +459,7 @@ unary_expr:
/* __extension__ turns off -pedantic for following primary. */
| extension cast_expr %prec UNARY
{ $$ = $2;
pedantic = $<itype>1; }
RESTORE_WARN_FLAGS ($1); }
| unop cast_expr %prec UNARY
{ $$ = build_unary_op ($1, $2, 0);
overflow_warning ($$); }
@ -1015,7 +1026,7 @@ decl:
| declmods ';'
{ pedwarn ("empty declaration"); }
| extension decl
{ pedantic = $<itype>1; }
{ RESTORE_WARN_FLAGS ($1); }
;
/* Declspecs which contain at least one type specifier or typedef name.
@ -1614,7 +1625,7 @@ component_decl:
{ $$ = NULL_TREE; }
| extension component_decl
{ $$ = $2;
pedantic = $<itype>1; }
RESTORE_WARN_FLAGS ($1); }
;
components:
@ -2426,8 +2437,9 @@ identifiers_or_typenames:
extension:
EXTENSION
{ $<itype>$ = pedantic;
pedantic = 0; }
{ $$ = SAVE_WARN_FLAGS();
pedantic = 0;
warn_pointer_arith = 0; }
;
ifobjc

3
gcc/gcc/extend.texi
View File

@ -2928,7 +2928,8 @@ macros to replace them with the customary keywords. It looks like this:
@end example
@findex __extension__
@samp{-pedantic} causes warnings for many GNU C extensions. You can
@samp{-pedantic} and other options cause warnings for many
GNU C extensions. You can
prevent such warnings within one expression by writing
@code{__extension__} before the expression. @code{__extension__} has no
effect aside from this.