gcc 4.8.0 20120318 (experimental) in C++11 mode rejects the following code:

//---
struct A {
 int m;
 A() = delete;
};

A a = {1}; // line 6
//---

"6|error: could not convert '{1}' from '<brace-enclosed initializer list>' to 'A'|"

But according to N3290 (N3376 still the same) the user-declared, deleted default-constructor should not prevent A from being an aggregate type and aggregate initialization should happen here. The error text implies that A is considered as a non-aggregate and no feasible constructor is found.

According to 8.4.2 p4:

"A function is user-provided if it is user-declared and not explicitly
defaulted or deleted on its first declaration."

and by 8.5.1 p1:

"An aggregate is [..] a class (Clause 9) with no user-provided constructors"

Thus, the deleted default constructor is not a user-provided constructor and aggregate initialization should work.

This is due to DR 1135 which is already part of C++11:

http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#1135