[Bug 1510042] Re: linking against -ljsoncpp fails with clang

[Launchpad Bug Tracker]

This bug was fixed in the package llvm-toolchain-3.8 - 1:3.8-2ubuntu4

---
llvm-toolchain-3.8 (1:3.8-2ubuntu4) xenial-proposed; urgency=medium

  * SRU:
  * Add support for gcc's attribute abi_tag (needed for compatibility with
GCC 5's libstdc++); taken from the trunk. Closes: #797038. LP: #1510042.

 -- Matthias Klose   Sat, 09 Jul 2016 13:22:59 +0200

** Changed in: llvm-toolchain-3.8 (Ubuntu Xenial)
   Status: Fix Committed => Fix Released

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Title:
  linking against -ljsoncpp fails with clang

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[Bug 1510042] Re: linking against -ljsoncpp fails with clang

[Matthias Klose]

the provided example now links.

** Tags removed: verification-needed
** Tags added: verification-done

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Title:
  linking against -ljsoncpp fails with clang

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[Bug 1510042] Re: linking against -ljsoncpp fails with clang

[Mathew Hodson]

** Changed in: llvm-toolchain-3.8 (Ubuntu Xenial)
   Importance: Undecided => Medium

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Title:
  linking against -ljsoncpp fails with clang

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[Bug 1510042] Re: linking against -ljsoncpp fails with clang

[Martin Pitt]

Hello Jeff, or anyone else affected,

Accepted llvm-toolchain-3.8 into xenial-proposed. The package will build
now and be available at https://launchpad.net/ubuntu/+source/llvm-
toolchain-3.8/1:3.8-2ubuntu4 in a few hours, and then in the -proposed
repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to
enable and use -proposed.  Your feedback will aid us getting this update
out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, and change the tag
from verification-needed to verification-done. If it does not fix the
bug for you, please add a comment stating that, and change the tag to
verification-failed.  In either case, details of your testing will help
us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Changed in: llvm-toolchain-3.8 (Ubuntu Xenial)
   Status: Confirmed => Fix Committed

** Tags added: verification-needed

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Title:
  linking against -ljsoncpp fails with clang

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[Bug 1510042] Re: linking against -ljsoncpp fails with clang

[Launchpad Bug Tracker]

This bug was fixed in the package llvm-toolchain-3.8 - 1:3.8.1-3ubuntu1

---
llvm-toolchain-3.8 (1:3.8.1-3ubuntu1) yakkety; urgency=medium

  * Merge with Debian; remaining changes:

llvm-toolchain-3.8 (1:3.8.1-3) unstable; urgency=medium

  * Add -gsplit-dwarf to CXXFLAGS to workaround the memory allocation
issue on i386 (hopefully)

llvm-toolchain-3.8 (1:3.8.1-2ubuntu2) yakkety; urgency=medium

  * Add support for gcc's attribute abi_tag (needed for compatibility with
GCC 5's libstdc++); taken from the trunk. Closes: #797038. LP: #1510042.

 -- Matthias Klose   Sat, 09 Jul 2016 17:19:37 +0200

** Changed in: llvm-toolchain-3.8 (Ubuntu)
   Status: Confirmed => Fix Released

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Title:
  linking against -ljsoncpp fails with clang

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[Bug 1510042] Re: linking against -ljsoncpp fails with clang

[Matthias Klose]

** Changed in: llvm-toolchain-3.8 (Ubuntu Xenial)
   Status: New => Confirmed

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Title:
  linking against -ljsoncpp fails with clang

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[Bug 1510042] Re: linking against -ljsoncpp fails with clang

[Matthias Klose]

** Description changed:

+ SRU acceptance criteria:  the example successfully links.
+ 
  On updating ubuntu from 15.04 to 15.10, I see changes in how clang
  resolves references to some libraries. (I think this is not an ubuntu
  question but rather a clang question and that I've missed some subtlety
  on how clang has recently changed.  I suspect initially that this is
  related to the gcc-5 ABI changes, but I'm not sure how to proceed.)
  
  Here's a tiny test example designed only to tickle the phenomenon:
  
  #include 
  #include 
  
  int main(int argc, char *argv[]) {
- std::cout << argc << " - " << argv[0] << std::endl;
- Json::Reader reader;
- Json::Value root;
- reader.parse("", root, false);
- std::cout << reader.getFormattedErrorMessages() << std::endl;
- return 0;
+ std::cout << argc << " - " << argv[0] << std::endl;
+ Json::Reader reader;
+ Json::Value root;
+ reader.parse("", root, false);
+ std::cout << reader.getFormattedErrorMessages() << std::endl;
+ return 0;
  }
  
  If I compile like this
  
  clang++ -ggdb3 -Wall -Wextra -std=c++14 -o json_test json_test.cc
  -ljsoncpp
  
  /tmp/json_test-680d3a.o: In function `main':
  /tmp/json_test.cc:10: undefined reference to 
`Json::Reader::getFormattedErrorMessages() const'
  clang: error: linker command failed with exit code 1 (use -v to see 
invocation)
  
  And yet the definition appears to be present:
  
  jeff@birdsong:src $ objdump -TC /usr/lib/x86_64-linux-gnu/libjsoncpp.so | 
grep getFormatted
  e190 gDF .text  04d2  Base
Json::OurReader::getFormattedErrorMessages[abi:cxx11]() const
  dc70 gDF .text  04d2  Base
Json::Reader::getFormattedErrorMessages[abi:cxx11]() const
- jeff@birdsong:src $ 
+ jeff@birdsong:src $
  
  The abi:cxx11 suggests I might at least try this
  
  clang++ -ggdb3 -Wall -Wextra -std=c++11 -o json_test json_test.cc
  -ljsoncpp
  
  but same error. On the other hand, this works fine:
  
  g++ -ggdb3 -Wall -Wextra -std=c++14 -o json_test json_test.cc -ljsoncpp
  
  Fwiw, here's version info:
  
  jeff@birdsong:tmp $ g++ --version
  g++ (Ubuntu 5.2.1-22ubuntu2) 5.2.1 20151010
  Copyright (C) 2015 Free Software Foundation, Inc.
  This is free software; see the source for copying conditions.  There is NO
  warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  
  jeff@birdsong:tmp $ clang++ --version
  Ubuntu clang version 3.6.2-1 (tags/RELEASE_362/final) (based on LLVM 3.6.2)
  Target: x86_64-pc-linux-gnu
  Thread model: posix
  jeff@birdsong:tmp $
  
  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: libjsoncpp-dev 0.10.5-1
  ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
  Uname: Linux 4.2.0-16-generic x86_64
  ApportVersion: 2.19.1-0ubuntu3
  Architecture: amd64
  CurrentDesktop: i3
  Date: Mon Oct 26 12:00:40 2015
  Dependencies:
-  gcc-5-base 5.2.1-22ubuntu2
-  libc6 2.21-0ubuntu4
-  libgcc1 1:5.2.1-22ubuntu2
-  libjsoncpp0v5 0.10.5-1
-  libstdc++6 5.2.1-22ubuntu2
+  gcc-5-base 5.2.1-22ubuntu2
+  libc6 2.21-0ubuntu4
+  libgcc1 1:5.2.1-22ubuntu2
+  libjsoncpp0v5 0.10.5-1
+  libstdc++6 5.2.1-22ubuntu2
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2015-10-23 (2 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  SourcePackage: libjsoncpp
  UpgradeStatus: Upgraded to wily on 2015-10-23 (2 days ago)

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Title:
  linking against -ljsoncpp fails with clang

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[Bug 1510042] Re: linking against -ljsoncpp fails with clang

[Matthias Klose]

** Also affects: llvm-toolchain-3.8 (Ubuntu Xenial)
   Importance: Undecided
   Status: New

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  linking against -ljsoncpp fails with clang

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[Bug 1510042] Re: linking against -ljsoncpp fails with clang

[Alberto Salvia Novella]

** Changed in: llvm-toolchain-3.8 (Ubuntu)
   Importance: Undecided => Medium

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  linking against -ljsoncpp fails with clang

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[Bug 1510042] Re: linking against -ljsoncpp fails with clang

[Matthias Klose]

yes, clang is not yet aware of the GCC5 mangling

** Changed in: llvm-toolchain-3.8 (Ubuntu)
   Status: New => Confirmed

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  linking against -ljsoncpp fails with clang

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[Bug 1510042] Re: linking against -ljsoncpp fails with clang

[Bug Watch Updater]

** Changed in: llvm-toolchain-3.8 (Debian)
   Status: Unknown => Confirmed

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  linking against -ljsoncpp fails with clang

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[Bug 1510042] Re: linking against -ljsoncpp fails with clang

[LocutusOfBorg]

assigning to clang

** Bug watch added: Debian Bug tracker #797038
   http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=797038

** Also affects: libjsoncpp (Debian) via
   http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=797038
   Importance: Unknown
   Status: Unknown

** Package changed: libjsoncpp (Ubuntu) => llvm-toolchain-3.8 (Ubuntu)

** Package changed: libjsoncpp (Debian) => llvm-toolchain-3.8 (Debian)

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Title:
  linking against -ljsoncpp fails with clang

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