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/*=========================================================================
*
* Copyright NumFOCUS
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
namespace itk
{
// Opened this namespace, just to avoid KWStyle check error, "namespace not defined".
}
//
// 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)));
// 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;
};
using AlignedA = A __attribute__((aligned(64)));
AlignedA * AlignedElementsOfA;
};
// This structure will generate a compiler error if the template
// argument is false
template <bool V>
struct OnlyTrue;
template <>
struct OnlyTrue<true>
{
static bool Result = true;
};
int
main()
{
foo<int> f;
using AlignedA = A __attribute__((aligned(64)));
return OnlyTrue<__alignof__(AlignedA) == 64>::Result && OnlyTrue<__alignof__(B) == 64>::Result;
return 0;
}
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