Package: libstdc++6-4.7-dev
Version: 4.7.2-5
Severity: important
Dear Maintainer,
The following code compiles with gcc, but fails to compile with clang.
$ cat /tmp/test.cc
#include <condition_variable>
$ clang --version
Debian clang version 3.4-1 (trunk) (based on LLVM 3.4)
Target: x86_64-pc-linux-gnu
Thread model: posix
$ clang -std=c++11 /tmp/test.cc
In file included from /tmp/test.cc:1:
In file included from
/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../include/c++/4.7/condition_variable:38:
/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../include/c++/4.7/chrono:540:6:
error: no matching constructor for initialization of 'duration' (aka
'std::chrono::duration<long, std::ratio<1, 1000000> >')
: __d(__t.time_since_epoch())
^ ~~~~~~~~~~~~~~~~~~~~~~
/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../include/c++/4.7/condition_variable:111:42:
note: in instantiation of function template specialization
'std::chrono::time_point<std::chrono::system_clock, std::chrono::duration<long,
std::ratio<1, 1000000> > >::time_point<std::chrono::duration<long, std::ratio<1,
1000000000> > >' requested here
const __clock_t::time_point __s_atime = __s_entry + __delta;
^
/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../include/c++/4.7/chrono:234:12:
note: candidate constructor not viable: no known conversion from
'duration<[...], ratio<[...], 1000000000>>' to 'const duration<[...],
ratio<[...], 1000000>>' for 1st argument
constexpr duration(const duration&) = default;
^
/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../include/c++/4.7/chrono:240:23:
note: candidate template ignored: couldn't infer template argument ''
constexpr explicit duration(const _Rep2& __rep)
^
/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../include/c++/4.7/chrono:247:14:
note: candidate template ignored: couldn't infer template argument ''
constexpr duration(const duration<_Rep2, _Period2>& __d)
^
/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../include/c++/4.7/chrono:232:12:
note: candidate constructor not viable: requires 0 arguments, but 1 was provided
constexpr duration() : __r() { }
^
1 error generated.
$ gcc -std=c++11 /tmp/test.cc
/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../x86_64-linux-gnu/crt1.o(.text+0x20):
error: undefined reference to 'main'
collect2: error: ld returned 1 exit status
Upstream seems to have fixed the problem. Can the upstream fix be applied here?
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53841
Extra packages (build from source from unstable.)
ii clang-3.4 1:3.4~svn183914-1
-- System Information:
Debian Release: 7.1
APT prefers stable-updates
APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)
Kernel: Linux 3.2.0-4-rt-amd64 (SMP w/4 CPU cores; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages libstdc++6-4.7-dev depends on:
ii g++-4.7 4.7.2-5
ii gcc-4.7-base 4.7.2-5
ii libc6-dev 2.13-38
ii libstdc++6 4.7.2-5
libstdc++6-4.7-dev recommends no packages.
Versions of packages libstdc++6-4.7-dev suggests:
pn libstdc++6-4.7-doc <none>
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