Remove AIX support

There isn't a lot of user demand for AIX support, we have a bunch of
hacks 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's
still supported for stable versions.

The acute issue that triggered this decision was that after commit
8af2565248, the AIX buildfarm members have been hitting this
assertion:

    TRAP: failed Assert("(uintptr_t) buffer == TYPEALIGN(PG_IO_ALIGN_SIZE, buffer)"), File: "md.c", Line: 472, PID: 2949728

Apperently the "pg_attribute_aligned(a)" attribute doesn't work on AIX
for 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 support
instead.

Discussion: https://www.postgresql.org/message-id/[email protected]
Reviewed-by: Andres Freund, Noah Misch, Thomas Munro

1 files changed, 0 insertions, 39 deletions

diff --git a/src/makefiles/Makefile.aix b/src/makefiles/Makefile.aix
deleted file mode 100644
index dd16a7a0378..00000000000
--- a/src/makefiles/Makefile.aix
+++ /dev/null
@@ -1,39 +0,0 @@
-# MAKE_EXPORTS is required for svr4 loaders that want a file of
-# symbol names to tell them what to export/import.
-MAKE_EXPORTS= true
-
-# -blibpath must contain ALL directories where we should look for libraries
-libpath := $(shell echo $(subst -L,:,$(filter -L/%,$(LDFLAGS))) | sed -e's/ //g'):/usr/lib:/lib
-
-# when building with gcc, need to make sure that libgcc can be found
-ifeq ($(GCC), yes)
-libpath := $(libpath):$(dir $(shell gcc -print-libgcc-file-name))
-endif
-
-rpath = -Wl,-blibpath:'$(rpathdir)$(libpath)'
-
-LDFLAGS_SL += -Wl,-bnoentry -Wl,-H512 -Wl,-bM:SRE
-
-# gcc needs to know it's building a shared lib, otherwise it'll not emit
-# correct code / link to the right support libraries
-ifeq ($(GCC), yes)
-LDFLAGS_SL += -shared
-endif
-
-# env var name to use in place of LD_LIBRARY_PATH
-ld_library_path_var = LIBPATH
-
-
-POSTGRES_IMP= postgres.imp
-
-ifdef PGXS
-BE_DLLLIBS= -Wl,-bI:$(pkglibdir)/$(POSTGRES_IMP)
-else
-BE_DLLLIBS= -Wl,-bI:$(top_builddir)/src/backend/$(POSTGRES_IMP)
-endif
-
-MKLDEXPORT_DIR=src/backend/port/aix
-MKLDEXPORT=$(top_srcdir)/$(MKLDEXPORT_DIR)/mkldexport.sh
-
-%$(DLSUFFIX): %.o
-	$(CC) $(CFLAGS) $*.o $(LDFLAGS) $(LDFLAGS_SL) -o $@ $(BE_DLLLIBS)