Package: g++-4.2
Version: 4.2.2-5
Severity: wishlist
The warning generated at gcc/cp/call.c:4548 doesn't have a warning type
associated with it, so there's no way to turn this warning into an
error.
This is a very serious warning, as indicated by the fact that it tells
you the call will abort at runtime. If a user doesn't notice this
warning, debugging the problem is very difficult.
If one could add something like -Werror=pass-non-POD to the gcc options,
then this would save quite a few headaches here :)
Maybe something along the lines of...
--- gcc-20071008.orig/gcc/c.opt 2007-09-01 16:49:07.000000000 -0400
+++ gcc-20071008/gcc/c.opt 2008-01-11 10:09:57.000000000 -0500
@@ -330,6 +330,10 @@
C ObjC C++ ObjC++ Var(warn_parentheses)
Warn about possibly missing parentheses
+Wpass-non-pod
+C++ Var(warn_pass_non_pod)
+Warn about passing non-POD types through '...'
+
Wpmf-conversions
C++ ObjC++ Var(warn_pmf2ptr) Init(1)
Warn when converting the type of pointers to member functions
diff -urN gcc-20071008.orig/gcc/cp/call.c gcc-20071008/gcc/cp/call.c
--- gcc-20071008.orig/gcc/cp/call.c 2007-09-13 08:57:52.000000000 -0400
+++ gcc-20071008/gcc/cp/call.c 2008-01-11 10:09:53.000000000 -0500
@@ -4545,7 +4545,7 @@
there is no need to emit a warning, since the expression won't be
evaluated. We keep the builtin_trap just as a safety check. */
if (!skip_evaluation)
- warning (0, "cannot pass objects of non-POD type %q#T through %<...%>; "
+ warning (OPT_Wpass_non_pod, "cannot pass objects of non-POD type %q#T
through %<...%>; "
"call will abort at runtime", TREE_TYPE (arg));
arg = call_builtin_trap ();
arg = build2 (COMPOUND_EXPR, integer_type_node, arg,
-- System Information:
Debian Release: lenny/sid
APT prefers unstable
APT policy: (500, 'unstable'), (500, 'testing')
Architecture: amd64 (x86_64)
Kernel: Linux 2.6.23-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_CA.UTF-8, LC_CTYPE=en_CA.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Versions of packages g++-4.2 depends on:
ii gcc-4.2 4.2.2-5 The GNU C compiler
ii gcc-4.2-base 4.2.2-5 The GNU Compiler Collection (base
ii libc6 2.7-5 GNU C Library: Shared libraries
ii libstdc++6-4.2-dev 4.2.2-5 The GNU Standard C++ Library v3 (d
g++-4.2 recommends no packages.
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