| 2015-10-26 11:04:27 |
Jeff Abrahamson |
bug |
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|
added bug |
| 2016-04-01 09:37:15 |
Gianfranco Costamagna |
bug watch added |
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http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=797038 |
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| 2016-04-01 09:37:15 |
Gianfranco Costamagna |
bug task added |
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libjsoncpp (Debian) |
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| 2016-04-01 09:37:47 |
Gianfranco Costamagna |
affects |
libjsoncpp (Ubuntu) |
llvm-toolchain-3.8 (Ubuntu) |
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| 2016-04-01 09:38:08 |
Gianfranco Costamagna |
affects |
libjsoncpp (Debian) |
llvm-toolchain-3.8 (Debian) |
|
| 2016-04-01 10:30:34 |
Bug Watch Updater |
llvm-toolchain-3.8 (Debian): status |
Unknown |
Confirmed |
|
| 2016-04-04 16:56:07 |
Matthias Klose |
llvm-toolchain-3.8 (Ubuntu): status |
New |
Confirmed |
|
| 2016-04-20 14:53:52 |
Alberto Salvia Novella |
llvm-toolchain-3.8 (Ubuntu): importance |
Undecided |
Medium |
|
| 2016-07-09 11:19:10 |
Matthias Klose |
nominated for series |
|
Ubuntu Xenial |
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| 2016-07-09 11:19:10 |
Matthias Klose |
bug task added |
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llvm-toolchain-3.8 (Ubuntu Xenial) |
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| 2016-07-09 11:51:14 |
Matthias Klose |
description |
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 <jsoncpp/json/json.h>
#include <iostream>
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;
}
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
000000000000e190 g DF .text 00000000000004d2 Base Json::OurReader::getFormattedErrorMessages[abi:cxx11]() const
000000000000dc70 g DF .text 00000000000004d2 Base Json::Reader::getFormattedErrorMessages[abi:cxx11]() const
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
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) |
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 <jsoncpp/json/json.h>
#include <iostream>
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;
}
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
000000000000e190 g DF .text 00000000000004d2 Base Json::OurReader::getFormattedErrorMessages[abi:cxx11]() const
000000000000dc70 g DF .text 00000000000004d2 Base Json::Reader::getFormattedErrorMessages[abi:cxx11]() const
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
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) |
|
| 2016-07-09 15:06:13 |
Matthias Klose |
llvm-toolchain-3.8 (Ubuntu Xenial): status |
New |
Confirmed |
|
| 2016-07-11 22:47:51 |
Launchpad Janitor |
llvm-toolchain-3.8 (Ubuntu): status |
Confirmed |
Fix Released |
|
| 2016-07-12 07:02:41 |
Martin Pitt |
llvm-toolchain-3.8 (Ubuntu Xenial): status |
Confirmed |
Fix Committed |
|
| 2016-07-12 07:02:43 |
Martin Pitt |
bug |
|
|
added subscriber Ubuntu Stable Release Updates Team |
| 2016-07-12 07:02:47 |
Martin Pitt |
bug |
|
|
added subscriber SRU Verification |
| 2016-07-12 07:02:51 |
Martin Pitt |
tags |
amd64 apport-bug wily |
amd64 apport-bug verification-needed wily |
|
| 2016-07-20 07:04:27 |
Mathew Hodson |
llvm-toolchain-3.8 (Ubuntu Xenial): importance |
Undecided |
Medium |
|
| 2016-07-21 18:33:03 |
Matthias Klose |
tags |
amd64 apport-bug verification-needed wily |
amd64 apport-bug verification-done wily |
|
| 2016-07-26 13:48:08 |
Martin Pitt |
removed subscriber Ubuntu Stable Release Updates Team |
|
|
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| 2016-07-26 13:51:26 |
Launchpad Janitor |
llvm-toolchain-3.8 (Ubuntu Xenial): status |
Fix Committed |
Fix Released |
|
| 2016-08-03 07:43:12 |
Daniel van Vugt |
summary |
linking against -ljsoncpp fails with clang |
clang++ no longer ABI-compatible with g++ |
|
| 2016-08-05 22:09:49 |
Bug Watch Updater |
llvm-toolchain-3.8 (Debian): status |
Confirmed |
Fix Released |
|
