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RE: macOS10.12/Xcode8 introduces run-time crash when building libcurl for earlier iOS versions

From: Martin Storsjö <>
Date: Fri, 16 Sep 2016 14:29:05 +0300 (EEST)

On Fri, 16 Sep 2016, Daniel Stenberg wrote:

> On Fri, 16 Sep 2016, Peter White (jawhite2) wrote:
>> Just as a confirmation, this did affect OSX when I tested it, causing a
>> crash for the same reason. The partial-availability flag also fixes it for
>> OSX.
> This sounds like something we should try to automate and incorporate into the
> configure script for the sake of other iOS and macOS users, shouldn't we?

Yes, ideally.

-Werror=partial-availability is probably safe to add by default (if the
compiler supports it), since it matches how configure checks are used - if
a function is available and can be linked, we're free to use it.

But then we also need to make sure the user sets a sensible
-mmacosx-version-min or -miphoneos-version-min, which hasn't been quite
necessary so far. Or do OSX users generally set those whenever building
things? Should configure warn if they aren't set - or set a sensible
default low version if it isn't? Given the number of current and legacy
systems that one can build it for, picking a sensible default is a bit

// Martin - one of the videolan funny hat guys from last Friday :P

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Received on 2016-09-16