Flatpak 1.0 to be Released

Flatpak is the the Linux desktop app distribution framework
21 August 2018   1461

Developers presented a stable version of Flatpak 1.0 - a framework for building self-contained packages that are not tied to a specific Linux distribution. Among the supported systems: Debian, Fedora, Linux Mint and Ubuntu. Applications collected using Flatpak are runing in an isolated container outside the OS.

Flatpak-program contains only specific dependencies: the basic system and graphic libraries are connected as runtime-environments individually for each distribution. This allows you to run test or suspicious application iterations in a separate sandbox, and also to update packages without changing the system.

Key Features of Flatpak 1.0

  • Developers can separately mark out-of-date versions of packages, so during their installation, the user will receive a warning about this.
  • Applications can now create a separate sandbox and restart themself..
  • New utility flatpak-spawn. It works through the Portals API and is needed to create isolated environments and run commands on the host side.
  • Packages ca be installed through P2P (from USB-drives or on the local network) by default, with support for bundle-packages.
  • The Flathub service, containing both development tools and ready-made applications, has received the status of a stable project.
  • Stable release of the runtime platform by default Freedesktop, built using the new BuildStream system.
  • Internal reorganization of the code, improvement of overall stability and performance.

More information on the new version can be found on the Flatpak project GitHub page..

LLVM 10.0.0 to be Released

New version of the popular development toolkit brings, among other things, support for the C++ Concepts
26 March 2020   918

After six months of development, the release of the LLVM 10.0 project, a GCC-compatible toolkit (compilers, optimizers, and code generators), compiling programs into an intermediate bitcode of RISC-like virtual instructions (a low-level virtual machine with a multi-level optimization system), is presented. The generated pseudo-code can be converted using the JIT compiler into machine instructions directly at the time of program execution.

Among the new features of LLVM 10.0, there are support for C ++ Concepts (C ++ Concepts), termination of the launch of Clang in the form of a separate process, support for CFG checks (control flow guard) for Windows, and support for new CPU features.

The main innovations of LLVM 10.0:

  • New interprocedural optimizations and analyzers have been added to the Attributor framework. The prediction of the state of 19 different attributes, including 12 attributes of 12 LLVM IR and 7 abstract attributes such as liveness, is provided.
  • New built-in compiler matrix mathematical functions (Intrinsics) have been added, which, when compiled, are replaced by effective vector instructions.
  • Numerous improvements to the backends for the X86, AArch64, ARM, SystemZ, MIPS, AMDGPU, and PowerPC architectures. Added support for Cortex-A65, Cortex-A65AE, Neoverse E1 and Neoverse N1 CPUs. For ARMv8.1-M, ​​the code generation process has been optimized (for example, support for loops with minimal overhead has appeared) and support for auto-vectorization using the MVE extension has been added. Improved support for CPU MIPS Octeon. PowerPC includes vectorization of mathematical routines using the MASSV (Mathematical Acceleration SubSystem) library, improved code generation, and optimized memory access from loops. For x86, the processing of vector types v2i32, v4i16, v2i16, v8i8, v4i8 and v2i8 has been changed.
  • Improved code generator for WebAssembly. Added support for TLS (Thread-Local Storage) and atomic.fence instructions. Significantly expanded support for SIMD. WebAssembly object files added the ability to use function signatures with multiple values.
  • When processing cycles, the MemorySSA analyzer is used to determine the dependencies between different memory operations. MemorySSA can reduce compilation and execution time, or can be used instead of AliasSetTracker without sacrificing performance.
  • The LLDB debugger has significantly improved support for the DWARF v5 format. Improved build support with MinGW and added the initial ability to debug Windows executable files for ARM and ARM64 architectures. Added descriptions of options offered when autocompleting input by pressing tabs.
  • Enhanced LLD Linker Features. Improved support for the ELF format, including full compatibility of glob templates with the GNU linker, added support for the compressed debug sections ".zdebug", added the PT_GNU_PROPERTY property to determine the .note.gnu.property section (can be used in future Linux kernels), implemented modes "-z noseparate-code", "-z separate-code" and "-z separate-loadable-segments". Improved support for MinGW and WebAssembly.

Get more at the release notes.