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// { dg-do compile }
// -fpack-struct is necessary because the code below assumes the initial
// packing is larger than 1, which cannot ge guaranteed for all targets.
// { dg-options "-Wabi -fabi-version=1 -fpack-struct=8" }
// On ARM processors, the alignment of B will be 4 even though it
// contains only a single "char".  That would avoids the situation
// that the warning below is designed to catch.  We therefore
// explicitly set the default structure alignment to 1.
// { dg-options "-Wabi -fabi-version=1 -mstructure-size-boundary=8" { target arm*-*-* } }

struct A { virtual void f(); char c1; };
struct B { B(); char c2; };
struct C : public A, public virtual B {}; // { dg-warning "ABI" }