[Xcb] [Bug 104769] New: libxcb-1.12: optimizations above -O1 causing multiple applications to stop working

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104769

            Bug ID: 104769
           Summary: libxcb-1.12: optimizations above -O1 causing multiple
                    applications to stop working
           Product: XCB
           Version: 1.12
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Library
          Assignee: xcb at lists.freedesktop.org
          Reporter: news at jonasstein.de
        QA Contact: xcb at lists.freedesktop.org

initially reported on Gentoo https://bugs.gentoo.org/616402

Problem: TeamViewer 12 and 
Adobe acroread 9.x and probably other closed source applications do not start
anymore

Workaround: compile with CFLAGS="-march=native -O1 -pipe"

Compiler used: gcc-6.4.0

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