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Date:      Sun, 23 Aug 2015 13:59:51 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-ports-bugs@FreeBSD.org
Subject:   [Bug 202594] Fix graphics/darktable build with clang 3.7.0
Message-ID:  <bug-202594-13@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=202594

            Bug ID: 202594
           Summary: Fix graphics/darktable build with clang 3.7.0
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: Individual Port(s)
          Assignee: dumbbell@FreeBSD.org
          Reporter: dim@FreeBSD.org
             Flags: maintainer-feedback?(dumbbell@FreeBSD.org)
          Assignee: dumbbell@FreeBSD.org

Created attachment 160248
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=160248&action=edit
Avoid calling __builtin_cpu_supports() with clang

During the exp-run in bug 201377, it was found that graphics/darktable gives
errors with a recent clang 3.7.0 snapshot:

http://package18.nyi.freebsd.org/data/headamd64PR201377-default/2015-07-31_13h29m42s/logs/errors/darktable-1.6.7.log

This is because the program optionally calls __builtin_cpu_supports() to get
some CPU feature flags, and while clang 3.7.0 now supports this builtin, our
libgcc/libcompiler-rt does not have the required support yet. To fix this,
avoid calling the builtin, if clang is used.

Note that I still could not verify whether the port completely builds, since
for me, it always fails with:

CMake Error at data/cmake_install.cmake:76 (file):
  file INSTALL cannot find
 
"/usr/work/share/dim/ports/graphics/darktable/work/.build/data/darktable.desktop".
Call Stack (most recent call first):
  cmake_install.cmake:34 (include)

This is not a clang-related problem though.  It may be due to some of the dozen
dependencies, but I cannot figure out which one.

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