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riscv-software-src / riscv-tools

RISC-V Tools (ISA Simulator and Tests)
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not able to create :riscv32-unknown-elf-gcc #165

Open angrej2504 opened 6 years ago

angrej2504 commented 6 years ago

Hi,

I am using following doc to build tool-chain https://riscv.org/wp-content/uploads/2015/02/riscv-software-stack-tutorial-hpca2015.pdf at slide 18, it is mentioned to Generate RV32 code. Trying following commands: $ cd ${SRCDIR}/riscv-tools/riscv-gnu-toolchain $ ./configure --prefix=$RISCV $ make XLEN=32 linux

but getting following error image could you please help me out.

Angrej Singh

chlizheng commented 5 years ago

Hi, I have the same problem. Do you have solve it? Could you help me for this?

jim-wilson commented 5 years ago

Instructions from 2015 aren't useful. RISC-V is new, and there have been major changes to everything. Also, riscv-tools is old, obsolete, unsupported and should not be used. If you want up to date compiler sources, you have to git clone riscv-gnu-toolchain directly. riscv-gnu-toolchain has a README.md file with instructions on how to build it.

I think the only way you can get that error is if you already built a toolchain, and are trying to build a second one without removing the first one. If you have a stamps dir, then you already have done a build here. You can remove a toolchain with "make clean". But generally, it is better to create a build dir, cd into the build dir, and then use "../riscv-gnu-toolchain/configure ..." to configure. That way, you can have multiple build trees, and can easily remove a build tree with rm -rf.

mahsoommoosa42 commented 5 years ago

Hey, jim. I'm trying out the swerv-ISS. They require riscv32-unknown-build compiled with newlib. How do you do this?

jim-wilson commented 5 years ago

First of all, don't use riscvriscv-tools. It is broken. Use riscv/riscv-gnu-toolchain instead. It has a README file that explains how to build it.

Or you can try grabbing pre-built toolchains. SiFive has some available at sifive.com/boards.

You can get 32-bit code from a 64-bit multilib toolchain. Just add -march=rv32imac -mabi=ilp32 or whatever exact arch/abi you need. We don't copies of the libraries built for every possible arch/abi combination, but we do have most of the common ones. The SiFive toolchains are 64-bit multilib.