xPack GNU RISC-V Embedded GCC v10.1.0-1.1 released
The xPack GNU RISC-V Embedded GCC is the xPack distribution of the SiFive RISC-V GCC.
There are separate binaries for Windows (Intel 32/64-bit), macOS (Intel 64-bit) and GNU/Linux (Intel 32/64-bit, Arm 64-bit; no Arm 32-bit).
The binary files are available from GitHub releases.
The full details of installing the xPack GNU RISC-V Embedded GCC on various platforms are presented in the separate Install page.
The easiest way to install GNU RISC-V Embedded GCC is with
by using the binary xPack, available as
To install the latest version available, use:
xpm install --global @xpack-dev-tools/riscv-none-embed-gcc@latest --verbose
To install this specific version, use:
xpm install --global @firstname.lastname@example.org
The xPack GNU RISC-V Embedded GCC follows the official SiFive releases, with as little differences as possible.
This release is based on the v2020.08.0 release, and includes the SiFive extensions, including the vector support.
The following commits (from sifive/freedom-tools) were used:
- the sifive/riscv-binutils-gdb project, commit e30af3b8 from 28 Jul 2020;
- the sifive/riscv-gcc project, commit 04cdc9d1 from from 27 Aug 2020
- the sifive/riscv-newlib project, commit 7bee030c from 14 May 2019
- the sifive/riscv-binutils-gdb project, commit 24e9280a from 30 Jul 2020.
The supported libraries are:
$ riscv-none-embed-gcc -print-multi-lib .; rv32e/ilp32e;@march=rv32e@mabi=ilp32e rv32ea/ilp32e;@march=rv32ea@mabi=ilp32e rv32em/ilp32e;@march=rv32em@mabi=ilp32e rv32eac/ilp32e;@march=rv32eac@mabi=ilp32e rv32emac/ilp32e;@march=rv32emac@mabi=ilp32e rv32i/ilp32;@march=rv32i@mabi=ilp32 rv32if/ilp32f;@march=rv32if@mabi=ilp32f rv32ifd/ilp32d;@march=rv32ifd@mabi=ilp32d rv32ia/ilp32;@march=rv32ia@mabi=ilp32 rv32iaf/ilp32f;@march=rv32iaf@mabi=ilp32f rv32iafd/ilp32d;@march=rv32iafd@mabi=ilp32d rv32imaf/ilp32f;@march=rv32imaf@mabi=ilp32f rv32im/ilp32;@march=rv32im@mabi=ilp32 rv32imf/ilp32f;@march=rv32imf@mabi=ilp32f rv32imfc/ilp32f;@march=rv32imfc@mabi=ilp32f rv32imfd/ilp32d;@march=rv32imfd@mabi=ilp32d rv32iac/ilp32;@march=rv32iac@mabi=ilp32 rv32imac/ilp32;@march=rv32imac@mabi=ilp32 rv32imafc/ilp32f;@march=rv32imafc@mabi=ilp32f rv32imafdc/ilp32d;@march=rv32imafdc@mabi=ilp32d rv64i/lp64;@march=rv64i@mabi=lp64 rv64if/lp64f;@march=rv64if@mabi=lp64f rv64ifd/lp64d;@march=rv64ifd@mabi=lp64d rv64ia/lp64;@march=rv64ia@mabi=lp64 rv64iaf/lp64f;@march=rv64iaf@mabi=lp64f rv64iafd/lp64d;@march=rv64iafd@mabi=lp64d rv64imaf/lp64f;@march=rv64imaf@mabi=lp64f rv64im/lp64;@march=rv64im@mabi=lp64 rv64imf/lp64f;@march=rv64imf@mabi=lp64f rv64imfc/lp64f;@march=rv64imfc@mabi=lp64f rv64imfd/lp64d;@march=rv64imfd@mabi=lp64d rv64iac/lp64;@march=rv64iac@mabi=lp64 rv64imac/lp64;@march=rv64imac@mabi=lp64 rv64imafc/lp64f;@march=rv64imafc@mabi=lp64f rv64imafdc/lp64d;@march=rv64imafdc@mabi=lp64d
Compared to the original SiFive version, the same architecture and API options are supported, and there are minimal functional changes
libglosswas removed from the list of libraries always linked to the application, since it issues
ECALLinstructions that fail in bare metal environments
Support for newlib-nano is available using the
--specs=nano.specs option. For better results, this option must be
added to both compile and link time.
If no syscalls are needed,
--specs=nosys.specs can be used at link
time to provide empty implementations for the POSIX system calls.
The libraries are compiled with
-O2 -mcmodel=medany. The nano version is
-mcmodel=medany, otherwise the link will fail.
Support for Python scripting was added to GDB. This distribution provides
a separate binary,
support for Python 3.7.
The Python 3 run-time is included, so GDB does not need any version of Python to be installed, and is insensitive to the presence of other versions.
Support for Python 2 was discontinued.
Text User Interface (TUI)
Support for TUI was added to GDB. The
ncurses library (v6.2) was added to
- due to the very large number of instructions added by the vector support (~70K), the compiler sources became too large and it was not possible to build the Arm 32-bit image (#229)
- the archive size got too big for the Windows 32-bit node to handle, and
xpm installmay fail with RangeError: Array buffer allocation failed; the 64-bit systems are not affected.
On all platforms the packages are standalone, and expect only the standard runtime to be present on the host.
All dependencies that are build as shared libraries are copied locally in the same folder as the executable.
On GNU/Linux the binaries are adjusted to use a relative path:
$ readelf -d library.so | grep runpath 0x000000000000001d (RPATH) Library rpath: [$ORIGIN]
In the GNU ld.so search strategy, the
the highest priority, higher than
LD_LIBRARY_PATH, so if this later one
is set in the environment, it should not interfere with the xPack binaries.
Please note that previous versions, up to mid-2020, used
has a priority lower than
LD_LIBRARY_PATH, and does not tolerate setting
it in the environment.
Similarly, on macOS, the binaries are adjusted with
otool to use a
The original PDF documentation is available in the
Binaries for Windows, macOS and GNU/Linux are provided.
The binaries were built using the xPack Build Box (XBB), a set of build environments based on slightly older distributions, that should be compatible with most recent systems.
- Intel GNU/Linux: all binaries were built with GCC 9.3, running in an Ubuntu 12 Docker container
- Arm GNU/Linux: all binaries were built with GCC 9.3, running in an Ubuntu 16 Docker container (added in mid-2020)
- Windows: all binaries were built with mingw-w64 GCC 9.3, running in an Ubuntu 12 Docker container
- macOS: all binaries were built with GCC 9.3, running in a separate folder on macOS 10.10.5.
The scripts used to build this distribution are in:
For the prerequisites and more details on the build procedure, please see the README-MAINTAINER page.
The first set of tests were performed on Travis, by running a simple script to check if the binaries start and compile several simple programs on a wide range of platforms and distributions:
The binaries were testes on Windows 10 Pro 32/64-bit, Ubuntu 18 LTS 64-bit, Xubuntu 18 LTS 32-bit and macOS 10.14.
The tests consist in building and debugging some simple Eclipse projects available in the build project.
Since the source code used for GCC is identical to the one used by SiFive, the long and complex tests performed by SiFive to validate their release were not executed again.
The SHA-256 hashes for the files are:
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- GitHub xpack-dev-tools/riscv-none-embed-gcc-xpack
- this release
- all xPack releases
- all GNU MCU Eclipse releases
- individual file counters (grouped per release)
- npmjs.com @xpack-dev-tools/riscv-none-embed-gcc
Credit to Shields IO for the badges and to Somsubhra/github-release-stats for the individual file counters.