RHBA-2015:0880 - Bug Fix Advisory

Topic

Updated devtoolset-3-gcc packages that fix several bugs and add various
enhancements are now available for Red Hat Developer Toolset 3.1.

Description

The GNU Compiler Collection (GCC) is a portable compiler suite with support for
various programming languages, including C, C++, and Fortran. The
devtoolset-3-gcc packages provide the Red Hat Developer Toolset version of GCC,
as well as related libraries.

The devtoolset-3-gcc packages have been upgraded to upstream version 4.9.2,
which provides a number of bug fixes and enhancements over the previous version.
Among others:

• A new option, "-fsanitize=kernel-address", has been added, which enables

AddressSanitizer for the Linux kernel.

• The "-fsanitize-recover" option has been improved and now allows more

fine-grained selection of when it is desirable to recover and when not.

(BZ#1191557)

This update also fixes the following bugs:

• Previously, due to a bug in the stdarg functions optimization, the compiler

could produce incorrect code. The problem occurred only when the va_list
variable escaped a PHI node. This bug has been fixed, and the compiler now
generates correct code. (BZ#1192038)

• Previously, the OpenMP artificial functions generated by the compiler did not

contain the "DW_AT_name" attribute. Consequently, it was impossible to print
variables residing in an OpenMP region in the GNU debugger. With this update,
"DW_AT_name" is properly set, and now it is possible to print variables also in
OpenMP regions. (BZ#1025729)

• Previously, the libitm and libatomic packages from Red Hat Developer Toolset 3

conflicted with the corresponding packages from the base Red Hat Enterprise
Linux 7 system. With this update, the devtoolset-3-gcc packages for Red Hat
Enterprise Linux 7 no longer include libitm and libatomic. (BZ#1160176)

Users of devtoolset-3-gcc are advised to upgrade to these updated packages,
which fix these bugs and add these enhancements.

Solution

Before applying this update, make sure all previously released errata relevant
to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Software Collections (for RHEL Server) 1 for RHEL 7 x86_64
• Red Hat Software Collections (for RHEL Server) 1 for RHEL 6.6 x86_64
• Red Hat Software Collections (for RHEL Server) 1 for RHEL 6.5 x86_64
• Red Hat Software Collections (for RHEL Server) 1 for RHEL 6 x86_64
• Red Hat Software Collections (for RHEL Workstation) 1 for RHEL 7 x86_64
• Red Hat Software Collections (for RHEL Workstation) 1 for RHEL 6 x86_64
• Red Hat Software Collections (for RHEL Server) from RHUI 1 for RHEL 7 x86_64
• Red Hat Software Collections (for RHEL Server) from RHUI 1 for RHEL 6 x86_64

Fixes

• BZ - 1025729 - common block thread private variables out of scope inside OpenMP parallel region
• BZ - 1149294 - template argument deduction/substitution fails when default argument is lambda
• BZ - 1167957 - devtoolset-3-libstdc++-devel requires on /usr/lib64/libstdc++.so.6 triggers filelist download

CVEs

(none)

References

(none)