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The GNU Arm Embedded Toolchain is a ready-to-use, open-source suite of tools for C, C++ and assembly programming. The GNU Arm Embedded Toolchain targets the 32-bit Arm Cortex-A, Arm Cortex-M, and Arm Cortex-R processor families. The GNU Arm Embedded Toolchain includes the GNU Compiler (GCC) and is available free of charge directly from Arm for embedded software development on Windows, Linux, and Mac OS X operating systems. Follow the links on this page to download the right version for your development environment.
Release notes for****************************************************GNU Arm Embedded Toolchain 2020-q2-update****************************************************This release includes bare metal pre-built binaries for AArch32 EABI targets,which can be hosted on:* Windows 10 or later on 32/64-bit architecture* Linux - on AArch64 (RHEL 7, Ubuntu 14.04 or later) - on x86_64 (RHEL 7, Ubuntu 16.04 or later)* Mac OS X 10.14 or later on 64-bit architectureFor Windows, the binaries are provided with an installer and as a zip file.For Linux, the binaries are provided as tarball files.For Mac OS X, the binaries are provided as tarball and pkg files.The release also contains source code package (together with build scripts andinstructions to setup the build environment), which is composed of: * gcc : refs/vendors/ARM/heads/arm-9-branch git://gcc.gnu.org/git/gcc.git commit 13861a80750d118fbdca6006ab175903bacbb7ec * binutils : binutils-2_34-branch git://sourceware.org/git/binutils-gdb.git commit f75c52135257ea05da151a508d99fbaee1bb9dc1 * newlib and newlib-nano : newlib-3.3.0 git://sourceware.org/git/newlib-cygwin.git commit 6d79e0a58866548f435527798fbd4a6849d05bc7 * gdb : gdb-8.3-branch git://sourceware.org/git/binutils-gdb.git commit fc94da0a253e925166bbb1a429c190200dc5778dNote that some or all of the following prerequisites are downloaded whenbuilding from source: * EnvVarUpdate NSIS script : * expat 2.1.1 : -2.1.1.tar.bz2 * gmp 6.1.0 : -6.1.0.tar.bz2 * isl 0.18 : -0.18.tar.xz * libelf 0.8.13 : -0.8.13.tar.gz * libiconv 1.15 : -1.15.tar.gz * mpc 1.0.3 : -1.0.3.tar.gz * mpfr 3.1.4 : -3.1.4/mpfr-3.1.4.tar.bz2 * python 2.7.7 : -2.7.7.msi * zlib 1.2.8 : -1.2.8.tar.gzFeatures:* All GCC 9.3.1 features, plus latest mainline featuresTests:* Targets: + Variety of Cortex-M0/M0+/M3/M4/M7/A9 boards + Qemu + Arm Fast ModelsNotable changes in 2020-q2-update release:* Bumped binutils to version 2.34.* Bumped newlib to version 3.3.0.* Fixed -arm-embedded/+bug/1848002 Parallel builds fail on Windows due to bug in MinGW-w64 used to build binutils.* Fixed -software/tools/f/arm-compilers-forum/46294/macos-objdump-reading-section-bss-failed-because-memory-exhausted objdump: Reading section .bss failed because: memory exhausted.* Fixed _bug.cgi?id=93188 Fix rmprofile multilibs when architecture includes +mp or +sec.* Fixed -arm-embedded/+bug/1415310 Extend the --skip_steps to enable skipping the target library strip step.* Additional v7-a multilib directories: thumb/v7-a+fp/softfp thumb/v7-a+fp/hard thumb/v7-a+simd/softfp thumb/v7-a+simd/hard thumb/v7-a/nofp* Additional v7ve multilib directories: thumb/v7ve+simd/softfp thumb/v7ve+simd/hard* Additional v8-a multilib directories: thumb/v8-a/nofp thumb/v8-a+simd/softfp thumb/v8-a+simd/hardKnown issues:* Doing IPA on CMSE generates a linker error:The linker will error out when resulting object file contains a symbol forthe clone function with the __acle_se prefix that has a non-local binding. Issue occurs when compiling binaries for M-profile Secure Extensions wherethe compiler may decide to clone a function with the cmse_nonsecure_entryattribute. Although cloning nonsecure entry functions is legal, as long as the cloneis only used inside the secure application, the clone function itself shouldnot be seen as a secure entry point and so it should not have the __acle_seprefix. A possible work around for this is to add a 'noclone' attribute tofunctions with the 'cmse_nonsecure_entry'. This will prevent GCC from cloningsuch functions.
GNU Arm Embedded Toolchain 2020-q2-preview This is a preview release for M-profile Vector Extension (MVE) andCustom Datapath Extension (CDE) features, and is not a production release.For a production quality toolchain, use the GNU Arm Embedded Toolchain9-2020-q2-update release.This release includes bare metal pre-built binaries for AArch32 EABI targets,which can be hosted on:* Windows 10 or later on 32/64-bit architecture* Linux - on AArch64 (RHEL 7, Ubuntu 14.04 or later) - on x86_64 (RHEL 7, Ubuntu 16.04 or later)* Mac OS X 10.14 or later on 64-bit architectureFor Windows, the binaries are provided with an installer and as a zip file.For Linux, the binaries are provided as tarball files.For Mac OS X, the binaries are provided as tarball and pkg files.The release also contains source code package (together with build scripts andinstructions to setup the build environment), which is composed of: * gcc : refs/vendors/ARM/heads/arm-10 git://gcc.gnu.org/git/gcc.git commit 58ae4fa0f1563eacac56291c00c876e6594f9925 * binutils : master git://sourceware.org/git/binutils-gdb.git commit cceb53b8849bc76f522931890b585b41e6662fa5 * newlib and newlib-nano : newlib-3.3.0 git://sourceware.org/git/newlib-cygwin.git commit 6d79e0a58866548f435527798fbd4a6849d05bc7 * gdb : master git://sourceware.org/git/binutils-gdb.git commit cceb53b8849bc76f522931890b585b41e6662fa5Note that some or all of the following prerequisites are downloaded whenbuilding from source: * EnvVarUpdate NSIS script : * expat 2.1.1 : -2.1.1.tar.bz2 * gmp 6.1.0 : -6.1.0.tar.bz2 * isl 0.18 : -0.18.tar.xz * libelf 0.8.13 : -0.8.13.tar.gz * libiconv 1.15 : -1.15.tar.gz * mpc 1.0.3 : -1.0.3.tar.gz * mpfr 3.1.4 : -3.1.4/mpfr-3.1.4.tar.bz2 * python 2.7.7 : -2.7.7.msi * zlib 1.2.8 : -1.2.8.tar.gzFeatures:* All GCC 10.1 featuresTests:* Targets: + Variety of Cortex-M0/M0+/M3/M4/M7/A9 boards + Qemu + Arm Fast ModelsNotable changes in 2020-q2-preview release:* Added support for: + M-profile Vector Extension (MVE) assembler and intrinsics + Custom Datapath Extension (CDE) + Cortex-M55Known issues:* Doing IPA on CMSE generates a linker error:The linker will error out when resulting object file contains a symbol forthe clone function with the __acle_se prefix that has a non-local binding. Issue occurs when compiling binaries for M-profile Secure Extensions wherethe compiler may decide to clone a function with the cmse_nonsecure_entryattribute. Although cloning nonsecure entry functions is legal, as long as the cloneis only used inside the secure application, the clone function itself shouldnot be seen as a secure entry point and so it should not have the __acle_seprefix. A possible workaround for this is to add a 'noclone' attribute tofunctions with the 'cmse_nonsecure_entry'. This will prevent GCC from cloningsuch functions.* Load or Store of __fp16 type together with MVE might generate invalid code:If you use __fp16 type together with MVE enabled, then when the compiler needsto generate an instruction to load a Floating-point Extension register(S register) from memory or an instruction to store a Floating-point Extensionregister (S register) to memory, then the compiler generates the wrong assemblyinstruction. The wrong assembly instruction is generated by the front-end for anyoptimization other than -O0. The wrong instruction causes an error duringassembly, for example: "Error: instruction does not support writeback - `vstr.16 s15,[r0]!'" "Error: instruction does not support writeback - `vldr.16 s15,[r0]!'" The workaround is to use the -O0 command line option to generate the correctinstruction when loading or storing of __fp16 type together with MVE.* Uncompressing the Windows zip file requests permission to overwrite file: When you decompress the windows zip file,gcc-arm-none-eabi-10-2020-q2-preview-win32.zip, the decompression requestspermission to overwrite the file frame-apply.html. This is because the GDB documentationwithin the folder share/doc/gcc-arm-none-eabi/html/gdb contains files that are namedframe-apply.html and Frame-Apply.html, which are treated as identical names ona Windows host. You can choose to overwrite the file frame-apply.html with Frame-Apply.html. If youdecompress the zip file using a command-line tool, you can use a command-line option toautomatically overwrite the file, for example by using the -y command-line option with 7zip.* Readme.txt links to version 9.3 of the GCC online docs: Readme.txt contains the following links to version 9.3 of the GCC online docs: -9.3.0/gcc/ARM-Options.html#index-mcpu-2 -9.3.0/gcc/ARM-Options.html#index-mfloat-abi The correct links to version 10.1 of the GCC online docs are: -10.1.0/gcc/ARM-Options.html#index-mcpu-2 -10.1.0/gcc/ARM-Options.html#index-mfloat-abi 2b1af7f3a8