Re: 64 bit PostgreSQL 8.3.6 build on AIX 5300-09-02-0849 with IBM XL C/C++ 10.1.0.1 - initdb fails (could not dump unrecognized node type: 650)

Tom Lane wrote:
> So it seems we have a couple of problems here. Using xlc_r or xlC_r
> or adding -q64 to CC (rather than CFLAGS which is where it really
> belongs) will confuse this check.

Correction: Flags that determine the architecture usually belong in CC,
not in CFLAGS.

Test case for when a flag belongs into CC instead of CFLAGS:

To compile a file, you use $(CC) $(CPPFLAGS) $(CFLAGS).

To preprocess a file, you use $(CPP) $(CPPFLAGS), where CPP is usually
$(CC) -E.

If you have a compiler flag that applies for preprocessing, you must put
it into CC.

Another class of flags that is typically put into CC are those selecting
the C standards mode.

> Would it be reasonable to change the test quoted above to
>
> elif test "$PORTNAME" = "aix"; then ...
>
> that is try -qnoansialias anytime the compiler isn't gcc and the
> platform is aix? Is xlc used on any platform other than aix?

That would probably make sense. I think we just never supported xlc_r,
and the threading code rejects a separate thread-safe compiler.

> Also, has anyone got a clue what the switches selected in
> src/template/aix actually do, and whether they still make sense
> for modern AIX versions?

-qmaxmem=16384 is the memory for optimizations (in bytes).

-qsrcmsg prints the affected code line in a compiler error (instead of
just file name and line number).

-qlonglong is clear.