Re: pg_preadv() and pg_pwritev()

From: Sergey Shinderuk <s(dot)shinderuk(at)postgrespro(dot)ru>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Thomas Munro <thomas(dot)munro(at)gmail(dot)com>
Cc: pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: pg_preadv() and pg_pwritev()
Date: 2021-01-14 07:44:12
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>> The symptoms sound consistent with using bleeding-edge Xcode on a
>> Catalina machine ... please report exact OS and Xcode versions.
> macOS 10.15.7 (19H2)
> Xcode 12.3 (12C33)
> macOS SDK 11.1 (20C63)

Everything is fine if I run "configure" with

I noticed that "cc" invoked from command line uses:
-isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk

But "xcodebuild -version -sdk macosx Path" invoked by "configure" when
PG_SYSROOT is not provided gives:

Now I'm confused about different SDK versions and locations used by
Xcode and CommandLineTools :)

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