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Commit0b16bb8

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Remove AIX support
There isn't a lot of user demand for AIX support, we have a bunch ofhacks to work around AIX-specific compiler bugs and idiosyncrasies,and no one has stepped up to the plate to properly maintain it.Remove support for AIX to get rid of that maintenance overhead. It'sstill supported for stable versions.The acute issue that triggered this decision was that after commit8af2565, the AIX buildfarm members have been hitting thisassertion: TRAP: failed Assert("(uintptr_t) buffer == TYPEALIGN(PG_IO_ALIGN_SIZE, buffer)"), File: "md.c", Line: 472, PID: 2949728Apperently the "pg_attribute_aligned(a)" attribute doesn't work on AIXfor values larger than PG_IO_ALIGN_SIZE, for a static const variable.That could be worked around, but we decided to just drop the AIX supportinstead.Discussion:https://www.postgresql.org/message-id/20240224172345.32@rfd.leadboat.comReviewed-by: Andres Freund, Noah Misch, Thomas Munro
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‎Makefile

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@@ -13,6 +13,8 @@
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# AIX make defaults to building *every* target of the first rule. Start with
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# a single-target, empty rule to make the other targets non-default.
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# (We don't support AIX anymore, but if someone tries to build on AIX anyway,
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# at least they'll get the instructions to run 'configure' first.)
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all:
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allcheckinstallinstalldirsinstallcheckinstallcheck-paralleluninstallcleandistcleanmaintainer-cleandistdistcheckworldcheck-worldinstall-worldinstallcheck-world:

‎config/c-compiler.m4

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@@ -137,7 +137,7 @@ if test x"$pgac_cv__128bit_int" = xyes ; then
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AC_CACHE_CHECK([for __int128 alignment bug],[pgac_cv__128bit_int_bug],
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[AC_RUN_IFELSE([AC_LANG_PROGRAM([
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/* This must match the corresponding code in c.h: */
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#if defined(__GNUC__) || defined(__SUNPRO_C) || defined(__IBMC__)
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#if defined(__GNUC__) || defined(__SUNPRO_C)
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#define pg_attribute_aligned(a) __attribute__((aligned(a)))
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#elif defined(_MSC_VER)
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#define pg_attribute_aligned(a) __declspec(align(a))

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