This is the GNU MCU Eclipse (formerly GNU ARM Eclipse) version of the RISC-V Embedded GCC toolchain.
This release closely follows the official RISC-V distribution maintained by SiFive.
It is more or less similar to the 20180928 release, except support for SiFive specific CLIC interrupts, which was not included.
The following commits were used:
- the riscv/riscv-gcc project,
branch
riscv-gcc-8.1.0, commit 3c148a7e6ea from from July 3rd, 2018 - the riscv/riscv-binutils-gdb
project, branch
riscv-binutils-2.30, commit 0d2fb1b7ff from Aug 11th, 2018 - the riscv/riscv-newlib project, commit 77e11e180 from July 12th, 2018
GDB is a bit special, since it is only partly upstreamed and the RISC-V repos
are no longer updated, so the current build uses
git://sourceware.org/git/binutils-gdb.git, the 7dd36a6f1c commit from
Aug 23rd, 2018 (same as the SiFive release).
Compared to the original RISC-V version, the same architecture and API options are supported, and there are minimal functional changes
- newlib-nano is supported
march=rv32imaf/mabi=ilp32fwas added to the list of multilibs
The only notable addition is support for newlib-nano, using the
--specs=nano.specs option. For better results, this option must be
added to both compile and link time (the next release of the GNU MCU
Eclipse plug-ins will add support for this).
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.
Another addition compared to the SiFive distribution is the presence of the documentation, including the PDF manuals for all tools.
For issues related to the procedure used to build the GNU MCU Eclipse RISC-V Embedded GCC binaries, please report them via gnu-mcu-eclipse/riscv-none-gcc-build GitHub Issues.
For issues related to the xPack used to install the binaries, please report them via gnu-mcu-eclipse/riscv-none-gcc-xpack GitHub issues.
For issues related to the toolchain functionality (compiler, newlib gdb, etc) please report them via their original RISC-V projects:
For more info and support, please see the GNU MCU Eclipse project pages from:
http://gnu-mcu-eclipse.github.io
Thank you for using GNU MCU Eclipse,
Liviu Ionescu