One year and one month passed from the time when the last major version of the GNU Compiler Collection has been announced, so it is the time again to announce a new major GCC release, 4.9.0.
GCC 4.9.0 is a major release containing substantial new functionality not available in GCC 4.8.x or previous GCC releases. The Local Register Allocator, introduced in GCC 4.8.0 for ia32 and x86-64 targets only, is now used also on the Aarch64, ARM, S/390 and ARC targets by default and on PowerPC and RX targets optionally. There have been substantial improvements to C++ devirtualization and various scalability bottlenecks in the interprocedural optimizations and LTO have been fixed. Support for various C++14 additions have been added to the C++ Front End, on the standard C++ library side the most important addition is support for the C++11 <regex>. GCC 4.9.0 supports the OpenMP 4.0 standard for C and C++, and a partial implementation of the Cilk Plus extension for data and task parallelism. Various kinds of undefined behaviors in programs can be now diagnosed at runtime through Undefined Behavior Sanitizer. Support for the new little-endian powerpc64le-linux platform has been added, which defaults to the new PowerPC ELFV2 ABI. On x86-64 and ia32, support for the AVX-512 instruction set has been implemented. See http://gcc.gnu.org/gcc-4.9/changes.html for more information about changes in GCC 4.9. This release is available from the FTP servers listed here: http://www.gnu.org/order/ftp.html The release is in gcc/gcc-4.9.0/ subdirectory. If you encounter difficulties using GCC 4.9, please do not contact me directly. Instead, please visit http://gcc.gnu.org for information about getting help. Driving a leading free software project such as GNU Compiler Collection would not be possible without support from its many contributors. Not to only mention its developers but especially its regular testers and users which contribute to its high quality. The list of individuals is too large to thank individually!
