There is no way to pass extra flags to gcc though
riscv-gnu-toolchain Makefile.

This is neccesary for me, because I has to rewrite gmp,
isl, mpfr, mpc folders in source of gcc project. Moreover,
I don't want to rebuild them with gcc.

Also I think, the opportunity to pass extra flags will be
convenient for many development purposes.

This patch contains three minor updates:
1. Added texinfo to OS X dependency package
2. Brew tap discoteq/discoteq is no longer required to install the flock
3. Added tip in "Installation (Newlib)" to keep similar to the description
   in "Installation (Linux)" and fixed a typo.

Signed-off-by: Mingzheng Xing <xingmingzheng@iscas.ac.cn>

Add a tip so blindly following the instructions is more likely to just work.  
Issue #1169 

Signed-off-by: Carl Karsten <CFKarsten@gmail.com>

ubuntu20.04 make it need "clang ninja-build"

Signed-off-by: 长柳 <110147328+changliuxy@users.noreply.github.com>

Let's document how to use the environment variable RUNTESTFLAGS
for selecting the tests that should be executed.

Signed-off-by: Christoph Müllner <christoph.muellner@vrull.eu>

Let's document how to run all the test suites in order to increase the
number of people that will execute the tests.

Signed-off-by: Christoph Müllner <christoph.muellner@vrull.eu>

Set the default version to 2.2 for now, and once we bump to GCC 12 we
will bump that to 20191213.

The upstream musl libc does not support 32bit RISC-V builds.
We therefore only allow building the 64bit version (i.e.,
riscv64-unknown-linux-musl-).

Signed-off-by: Florian Hofhammer <florian.hofhammer@fhofhammer.de>

Signed-off-by: Florian Hofhammer <florian.hofhammer@fhofhammer.de>

This patch introduces a configure-time source-dir override for QEMU
similar to the existing overrides for the other toolchain sources.

Signed-off-by: Christoph Muellner <cmuellner@linux.com>

Just updating previous PR as `mpc` is a music player, `libmpc` is the correct required package.

Add AUR link: [https://aur.archlinux.org/packages/riscv-gnu-toolchain/](https://aur.archlinux.org/packages/riscv-gnu-toolchain/)

Added:

Also available for Arch users on the AUR: [https://aur.archlinux.org/packages/riscv-gnu-toolchain/](https://aur.archlinux.org/packages/riscv-gnu-toolchain/)

The current README.md only explains how to use multilib on the Linux cross-compiler, but not on the Newlib one. This might create confusion as seen here https://github.com/riscv/riscv-tools/issues/287, or makes it seem like you can't multilib on Newlib. It's also the case that the multilib option is more common on embedded toolchains rather than on Linux, so I believe this small change on documentation should clear things up.

Added dependencies for Arch Linux

Add BINUTILS_GDB_TARGET_FLAGS, init to --with-expat=yes, and pass to all 3 gdb
configure commands.  Update README.md to list expat package names.

https://github.com/riscv/riscv-gnu-toolchain/issues/296

Fixes: https://github.com/riscv/riscv-gnu-toolchain/issues/286

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