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Tom Lane
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On Sparc64, use of __attribute__(aligned(8)) with __int128 causes faulty code generation in gcc versions at least through 5.5.0. We can work around that by disabling use of __int128, so teach configure to test for the bug. This solution doesn't fix things for the case of cross-compiling with a buggy compiler; to support that nicely, we'd need to add a manual disable switch. Unless more such cases turn up, it doesn't seem worth the work. Affected users could always edit pg_config.h manually. In passing, fix some typos in the existing configure test for __int128. They're harmless because we only compile that code not run it, but they're still confusing for anyone looking at it closely. This is needed in support of commit 75180499, so back-patch to 9.5 as that was. Marina Polyakova, Victor Wagner, Tom Lane Discussion: https://postgr.es/m/0d3a9fa264cebe1cb9966f37b7c06e86@postgrespro.ru
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