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//
// Check if the compoler support the GNU attribute extension for
// alignment, and does not contain a bug which causes internal
// compiler segfault.
//
struct A
{
char a;
};
struct B
{
char b;
} __attribute__ ((aligned (64)));
// fail for gcc 4.1
#if __GNUC__ == 4 && __GNUC_MINOR__ == 1
#error This version of GCC is know to have a internal compilation error with this feature in ITK.
#endif
// BUG DETECTION: This following usage may generate a segfault during
// compilation.
//
// The following block of code causes an internal compiler error with
// Apple's (GCC) 4.2.1 (Apple Inc. build5666) (dot 3) compiler when
// compiled in debug mode with the -g flag.
//
template <typename T>
class foo
{
// NOTE: implicit constructor is required for this test
struct A
{
char a;
};
typedef A AlignedA __attribute__ ((aligned(64)));
AlignedA *AlignedElementsOfA;
};
// This structure will generate a compiler error if the template
// argument is false
template<bool t> struct OnlyTrue;
template<> struct OnlyTrue<true> { static bool Result = true; };
int main()
{
foo<int> f;
typedef A AlignedA __attribute__ ((aligned(64)));
return OnlyTrue<__alignof__( AlignedA ) == 64>::Result
&& OnlyTrue<__alignof__( B ) == 64>::Result;
return 0;
}
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