RHBA-2014:0272 - Bug Fix Advisory

Topic

Updated devtoolset-2-gcc packages that fix several bugs and add various
enhancements are now available for Red Hat Developer Toolset 2.1.

Description

The GNU Compiler Collection (GCC) is a portable compiler suite with support for
various programming languages, including C, C++, and Fortran. The
devtoolset-2-gcc packages provide the Red Hat Developer Toolset version of GCC
4.8, as well as related libraries.

The devtoolset-2-gcc packages have been upgraded to version 4.8.2, which
provides a number of bug fixes and enhancements over the previous version.

This update also fixes the following bugs:

• Previously, when GCC compiled Fortran code using large or medium Position

Independent Code (PIC) 64-bit code models, GCC was unable to delegitimize the
thread-local storage (TLS) addresses. Consequently, GCC could generate
incomplete debugging information in the DWARF format. A patch has been applied,
the code is now handled the same way as when compiling a 32-bit application, and
the described problem no longer occurs in this scenario. (BZ#994560)

• Previously, GCC was unable to correctly process the General Dynamic and the

Local Dynamic Thread-Local Storage Access Models code sequences on the AMD64 and
Intel 64 architecture. As a consequence, GCC could terminate unexpectedly with
an internal compiler error when using the "-mcmodel=large" and "-fpic" options.
This update adds support for these code sequences into the GCC and binutils
packages. (BZ#994244)

• Prior to this update, GCC was unable to properly compile a C++11 program when

using a lambda function as the default argument in a class. Consequently, GCC in
the constructor of the class could terminate unexpectedly with an internal
compiler error. With this update, GCC accepts the default argument-scope lambda
functions in a class and works correctly in the described scenario. (BZ#982324)

• Previously, GCC incorrectly instantiated the "noexcept" specifier in a

template context. Consequently, GCC could terminate unexpectedly with an
internal compiler error. GCC has been fixed to instantiate the "noexcept"
specifier only when doing full expression evaluation and programs are now
compiled correctly. (BZ#1065484)

Users of devtoolset-2-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.

This update is available via the Red Hat Network. Details on how to use the Red
Hat Network to apply this update are available at
https://access.redhat.com/site/articles/11258

Affected Products

• Red Hat Developer Toolset (for RHEL Server) 2 for RHEL 6 x86_64
• Red Hat Developer Toolset (for RHEL Server) 2 for RHEL 6 i386
• Red Hat Developer Toolset (for RHEL Server) 2 for RHEL 5 x86_64
• Red Hat Developer Toolset (for RHEL Server) 2 for RHEL 5 i386
• Red Hat Developer Toolset (for RHEL Workstation) 2 for RHEL 6 x86_64
• Red Hat Developer Toolset (for RHEL Workstation) 2 for RHEL 6 i386
• Red Hat Developer Toolset (for RHEL Workstation) 2 for RHEL 5 x86_64
• Red Hat Developer Toolset (for RHEL Workstation) 2 for RHEL 5 i386

Fixes

• BZ - 982324 - internal compiler error: in tsubst_copy
• BZ - 1017708 - asm goto miscompilation
• BZ - 1038301 - Backport some wrong code bugfixes

CVEs

(none)

References

(none)