Further tweaking of PG_SYSROOT heuristics for macOS.
authorTom Lane <[email protected]>
Wed, 20 Jan 2021 17:07:23 +0000 (12:07 -0500)
committerTom Lane <[email protected]>
Wed, 20 Jan 2021 17:07:57 +0000 (12:07 -0500)
commit175f716a8f37c0325cc3f683dad242536f9515d0
tree583a5dd55e5fe8fabe93f6e77cdb755d859eb5cc
parent0ddb529cf3e25afd94abf85aa3688b9d9063897c
Further tweaking of PG_SYSROOT heuristics for macOS.

It emerges that in some phases of the moon (perhaps to do with
directory entry order?), xcrun will report that the SDK path is
  /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk
which is normally a symlink to a version-numbered sibling directory.
Our heuristic to skip non-version-numbered pathnames was rejecting
that, which is the wrong thing to do.  We'd still like to end up
with a version-numbered PG_SYSROOT value, but we can have that by
dereferencing the symlink.

Like the previous fix, back-patch to all supported versions.

Discussion: https://postgr.es/m/522433.1611089678@sss.pgh.pa.us
src/template/darwin