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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2021-07-12 19:17:35 -0400 |
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| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2021-07-12 19:17:35 -0400 |
| commit | f014b1b9bb8eda4e82c1805969dbae2b07b7d54d (patch) | |
| tree | 80a22f024a04430db95263846f34f3d57ee0f5b6 /contrib/test_decoding/test_decoding.c | |
| parent | f10f0ae420ee62400876ab34dca2c09c20dcd030 (diff) | |
| download | postgresql-f014b1b9bb8eda4e82c1805969dbae2b07b7d54d.tar.gz postgresql-f014b1b9bb8eda4e82c1805969dbae2b07b7d54d.zip | |
Probe for preadv/pwritev in a more macOS-friendly way.
Apple's mechanism for dealing with functions that are available
in only some OS versions confuses AC_CHECK_FUNCS, and therefore
AC_REPLACE_FUNCS. We can use AC_CHECK_DECLS instead, so long as
we enable -Werror=unguarded-availability-new. This allows people
compiling for macOS to control whether or not preadv/pwritev are
used by setting MACOSX_DEPLOYMENT_TARGET, rather than supplying
a back-rev SDK. (Of course, the latter still works, too.)
James Hilliard
Discussion: https://postgr.es/m/20210122193230.25295-1-james.hilliard1@gmail.com
Diffstat (limited to 'contrib/test_decoding/test_decoding.c')
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