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Date:      Sun, 25 Nov 2018 15:43:36 +0000
From:      bugzilla-noreply@freebsd.org
To:        ports-bugs@FreeBSD.org
Subject:   [Bug 233506] devel/llvm70: (and prev versions) LLVM assertions are enabled unintentionally
Message-ID:  <bug-233506-7788@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D233506

            Bug ID: 233506
           Summary: devel/llvm70: (and prev versions) LLVM assertions are
                    enabled unintentionally
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: brooks@FreeBSD.org
          Reporter: greg@unrelenting.technology
             Flags: maintainer-feedback?(brooks@FreeBSD.org)
          Assignee: brooks@FreeBSD.org

LLVM's CMake build only enables assertions in Debug builds of LLVM.

The FreeBSD Ports do not set the LLVM_ENABLE_ASSERTIONS CMake variable.

LLVM relies on CMake to automatically add -DNDEBUG in non-Debug builds.

However, something =E2=80=94 looks like our *FLAGS environment variables =
=E2=80=94 overrides
CMake's flags and -DNDEBUG is lost.

Compare: (in CMakeCache)

CMAKE_CXX_FLAGS_RELEASE:STRING=3D-O2 -pipe -fstack-protector -isystem
/usr/local/include -fno-strict-aliasing  -isystem /usr/local/include

CMAKE_CXX_FLAGS_RELWITHDEBINFO:STRING=3D-O2 -g -DNDEBUG

So we're shipping debug assertions in production, and looks like not
intentionally!!

This has exposed a few easily fixable bugs in some tools (e.g. Mull), but it
looks like there are some clang assertions (e.g.
https://github.com/Andersbakken/rtags/issues/586 =E2=80=94 I'm seeing the s=
ame one in
devel/ccls) that no one wants to fix. (And they are deep in clang, not in t=
he
user of libclang.)


// As a workaround, we can add something like:

CFLAGS+=3D-DNDEBUG
CXXFLAGS+=3D-DNDEBUG

--=20
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