https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66262
Bug ID: 66262
Summary: [REGRESSION] testsuite failure with libstdc++ (gcc-5)
and g++-4.9 together
Product: gcc
Version: 5.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: costamagnagianfranco at yahoo dot it
Target Milestone: ---
Hi, sorry in advance for the low quality bug report.
I'm reporting this upstream, since I suspect the ABI broke in some bad way
between 4.9 and 5.0.
note: I tried to explain as much as possible on Debian bug [1]
Firstly I wasn't able to make it work with g++-5 and libstdc++ from gcc-5
package
After the Debian Maintainer rebuilt gcc-5 with
* Configure with
--disable-libstdcxx-dual-abi --with-default-libstdcxx-abi=c++98
While libstdc++ provides a dual ABI to support both the c++98 and c++11
ABI, there is no committment on compatibility of the old experimental
c++11 ABI from GCC 4.9 and the stable c++11 ABI in GCC 5.
and now I can build them with both g++-5 and libstdc++ from gcc-5.
the problem actually is that now Debian has libstdc++ from gcc-5, and the
default compiler still set to gcc-4.9.
With that combination (g++-4.9 and libstdc++ from gcc-5) the bug is there and I
can't upload in Debian the new release until I figure this out.
I can try to provide more informations, just feel free to ask me.
[1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=784655
