[Fontconfig-bugs] [Bug 102986] New: mkostemp weak linking on macOS Sierra causes a crash if library is run on 10.11 or older

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=102986

            Bug ID: 102986
           Summary: mkostemp weak linking on macOS Sierra causes a crash
                    if library is run on 10.11 or older
           Product: fontconfig
           Version: 2.12
          Hardware: x86-64 (AMD64)
                OS: Mac OS X (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: library
          Assignee: fontconfig-bugs at lists.freedesktop.org
          Reporter: g.litenstein at gmail.com
        QA Contact: freedesktop at behdad.org

The MacOS SDK did not include mkostemp until Sierra; building on previous
versions works fine because it looks for the function, doesn't find it and it
moves on. However, if somebody builds fontconfig against the 10.12 (and
presumably also 10.13) SDK, it will be impossible to run on computers running
10.11.6 or older, since the symbol is weak-linked in libSystem.B.dylib.

The fix for this is extremely simple: passing ac_cv_func_mkostemp=no to
configure.

I made a patch to fix this for macports (PR:
https://github.com/macports/macports-ports/pull/802) but the maintainer of the
port asked me to consult here whether you consider this to be an issue that
would best be solved on your end or by the various package managers.

I personally am of the mind that this is more of an XCode issue than a
fontconfig issue  but that's just me.

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/fontconfig-bugs/attachments/20170925/47be1199/attachment.html>