postgresql/config
Tom Lane 5a5c2feca3 Absorb -D_USE_32BIT_TIME_T switch from Perl, if relevant.
Commit 3c163a7fc's original choice to ignore all #define symbols whose
names begin with underscore turns out to be too simplistic.  On Windows,
some Perl installations are built with -D_USE_32BIT_TIME_T, and we must
absorb that or we get the wrong result for sizeof(PerlInterpreter).

This effectively re-reverts commit ef58b87df, which injected that symbol
in a hacky way, making it apply to all of Postgres not just PL/Perl.
More significantly, it did so on *all* 32-bit Windows builds, even when
the Perl build to be used did not select this option; so that it fails
to work properly with some newer Perl builds.

By making this change, we would be introducing an ABI break in 32-bit
Windows builds; but fortunately we have not used type time_t in any
exported Postgres APIs in a long time.  So it should be OK, both for
PL/Perl itself and for third-party extensions, if an extension library
is built with a different _USE_32BIT_TIME_T setting than the core code.

Patch by me, based on research by Ashutosh Sharma and Robert Haas.
Back-patch to all supported branches, as commit 3c163a7fc was.

Discussion: https://postgr.es/m/CANFyU97OVQ3+Mzfmt3MhuUm5NwPU=-FtbNH5Eb7nZL9ua8=rcA@mail.gmail.com
2017-08-14 11:48:59 -04:00
..
ac_func_accept_argtypes.m4 Remove some configure header-file checks that we weren't really using. 2017-02-25 18:10:09 -05:00
ax_prog_perl_modules.m4 Make configure check for IPC::Run when --enable-tap-tests is specified. 2017-06-15 15:56:12 -04:00
ax_pthread.m4 Update ax_pthread.m4 to an experimental draft version from upstream. 2015-07-30 14:14:50 +03:00
c-compiler.m4 Fix configure check for typeof 2017-03-28 22:28:56 -04:00
c-library.m4 Remove some configure header-file checks that we weren't really using. 2017-02-25 18:10:09 -05:00
config.guess Update config.guess and config.sub 2017-05-14 11:09:34 -04:00
config.sub Update config.guess and config.sub 2017-05-14 11:09:34 -04:00
docbook.m4 Further improve consistency of configure's program searching. 2017-08-01 11:40:08 -04:00
general.m4
install-sh
libtool.m4
Makefile Install our "missing" script where PGXS builds can find it. 2015-12-11 16:15:05 -05:00
missing
perl.m4 Absorb -D_USE_32BIT_TIME_T switch from Perl, if relevant. 2017-08-14 11:48:59 -04:00
pkg.m4 ICU support 2017-03-23 15:28:48 -04:00
prep_buildtree
programs.m4 Further improve consistency of configure's program searching. 2017-08-01 11:40:08 -04:00
python.m4 Further improve consistency of configure's program searching. 2017-08-01 11:40:08 -04:00
tcl.m4 Further improve consistency of configure's program searching. 2017-08-01 11:40:08 -04:00