http://llvm.org/bugs/show_bug.cgi?id=11082
Summary: Support may_alias in processTypeAttrs()
Product: clang
Version: trunk
Platform: PC
OS/Version: All
Status: NEW
Severity: normal
Priority: P
Component: Frontend
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
clang now complains about unsupported attributes on types. As a consequence, it
complains about may_alias in cast expressions such as here:
void g(int p __attribute__((may_alias))) {}
void f() {
int a = 0;
g((int __attribute__((may_alias)))a);
}
hummer:clang thakis$ ../../Release+Asserts/bin/clang -Wall test.c -c
test.c:5:25: error: 'may_alias' attribute ignored when parsing type
g((int __attribute__((may_alias)))a);
^~~~~~~~~
1 error generated.
This is used in glib, see e.g. here:
http://codesearch.google.com/#cZwlSNS7aEw/external/bluetooth/glib/glib/gatomic.h&q=%5C(g_atomic_pointer_set%5C)%5C%20%5C(%5C(volatile%5C%20gpointer%5C%20G_GNUC_MAY_ALIAS%5C%20%5C*%5C)%5C%20%5C(void%5C%20%5C*%5C)%5C%20%5C(atomic%5C),%5C%20%5C(newval%5C)%5C)%5C)&type=cs&l=76
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