GCC 4.7.2 is the first bug-fix release containing important fixes
for regressions and serious bugs in GCC 4.7.1 with over 70 bugs
fixed since the previous release.
A notable change in GCC 4.7.2 compared to 4.7.1 are ABI bug fixes
related to some C++11 templates (std::list and std::pair). As a result,
code using those templates in C++11 mode is again ABI compatible with
code in C++03/C++98 mode or C++11 mode of GCC 4.6 and earlier, but might
be ABI incompatible with code compiled by GCC 4.7.1 or 4.7.0 in C++11
mode. See http://gcc.gnu.org/gcc-4.7/changes.html for more details.
This is the list of problem reports (PRs) from GCC's bug tracking system
that are known to be fixed in this release. This list might not be complete
(that is, it is possible that some PRs that have been fixed are not listed
here).
http://gcc.gnu.org/bugzilla/buglist.cgi?bug_status=RESOLVED&resolution=FIXED&target_milestone=4.7.2
GCC 4.7.0 is a major release, containing substantial new
functionality not available in GCC 4.6.x or previous GCC releases.
GCC 4.7 features support for software transactional memory on
selected architectures. The C++ compiler supports a bigger
subset of the new ISO C++11 standard such as support for atomics
and the C++11 memory model, non-static data member initializers,
user-defined literals, alias-declarations, delegating constructors,
explicit override and extended friend syntax. The C compiler adds support
for more features from the new ISO C11 standard. GCC now supports
version 3.1 of the OpenMP specification for C, C++ and Fortran.
The link-time optimization (LTO) framework has seen improvements
with regards to scalability, stability and resource needs. Inlining
and interprocedural constant propagation have been improved.
GCC 4.7 now supports various new GNU extensions to the DWARF debugging
information format, like entry value and call site information, a typed
DWARF stack and a more compact macro representation.
Extending the widest support for hardware architectures in the
industry, GCC 4.7 gains support for Adapteva's Epiphany processor,
National Semiconductor's CR16, and TI's C6X as well as Tilera's
TILE-Gx and TILEPro families of processors. The x86
family support has been extended by the Intel Haswell and AMD Piledriver
architectures. ARM has gained support for the Cortex-A7 family.
See
http://gcc.gnu.org/gcc-4.7/changes.html
for more information about changes in GCC 4.7.
