Tested x86_64-pc-linux-gnu, applying to trunk.
-- 8< --
When we're explicitly choosing GCC extensions, we similarly shouldn't
complain about optional features that GCC provides. This particular pattern
of cast between function and object pointer is used by gthr-posix.h on some
targets, including linux-gnu before glibc 2.34.
gcc/cp/ChangeLog:
* parser.cc (cp_parser_unary_expression) [RID_EXTENSION]: Also
suppress -Wconditionally-supported.
gcc/testsuite/ChangeLog:
* g++.dg/warn/Wconditionally-supported-1.C: Add __extension__ cases.
---
gcc/cp/parser.cc | 6 ++++++
gcc/testsuite/g++.dg/warn/Wconditionally-supported-1.C | 6 ++++++
2 files changed, 12 insertions(+)
diff --git a/gcc/cp/parser.cc b/gcc/cp/parser.cc
index 3c8c75575b0..4dd9474cf60 100644
--- a/gcc/cp/parser.cc
+++ b/gcc/cp/parser.cc
@@ -9150,9 +9150,15 @@ cp_parser_unary_expression (cp_parser *parser,
cp_id_kind * pidk,
/* Save away the PEDANTIC flag. */
cp_parser_extension_opt (parser, &saved_pedantic);
+ /* Also suppress -Wconditionally-supported. */
+ diagnostic_push_diagnostics (global_dc, input_location);
+ diagnostic_classify_diagnostic
+ (global_dc, OPT_Wconditionally_supported,
+ DK_IGNORED, input_location);
/* Parse the cast-expression. */
expr = cp_parser_simple_cast_expression (parser);
/* Restore the PEDANTIC flag. */
+ diagnostic_pop_diagnostics (global_dc, input_location);
pedantic = saved_pedantic;
return expr;
diff --git a/gcc/testsuite/g++.dg/warn/Wconditionally-supported-1.C
b/gcc/testsuite/g++.dg/warn/Wconditionally-supported-1.C
index 3c32edba8ce..192d709fd79 100644
--- a/gcc/testsuite/g++.dg/warn/Wconditionally-supported-1.C
+++ b/gcc/testsuite/g++.dg/warn/Wconditionally-supported-1.C
@@ -22,4 +22,10 @@ void foo ()
pf = reinterpret_cast <PF>(po); // { dg-warning "8:casting between
pointer-to-function and pointer-to-object is conditionally-supported" }
po = reinterpret_cast <PO>(pf); // { dg-warning "8:casting between
pointer-to-function and pointer-to-object is conditionally-supported" }
+
+ pf = __extension__ reinterpret_cast <PF>(pv);
+ pv = __extension__ reinterpret_cast <PV>(pf);
+
+ pf = __extension__ reinterpret_cast <PF>(po);
+ po = __extension__ reinterpret_cast <PO>(pf);
}
base-commit: 5ef73ba1cc17b8893ad9a4e95f9cd191dbc0bfa3
--
2.46.0
