add support for linux_riscv64 and freestanding_riscv64 #4089
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gingerBill
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flysand7
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Adds support for riscv64 through a Linux and freestanding target.
We require the float, doubles and integer multiplication extensions to be enabled. We default to the same features as clang with
-march=rv64gcwhich stands for "general computing". Users can tweak extensions with -microarch and -target-features. These default features are:64bit,a,c,d,f,m,relax,zicsr,zifenceiyou can find more info on them by compiling with-target-features:"help".You can either build with no libc through
odin build . -target:linux_riscv64 -no-crt -default-to-nil-allocatorand in my testing I needed-reloc-mode:staticor it would complain about thread local storage.Or, install the gnu toolchain
sudo apt install gcc-12-riscv64-linux-gnu libc6-dev-riscv64-crossto get the cross-compilation toolchain and useodin build . -target:linux_riscv64 -extra-linker-flags:"-fuse-ld=/usr/bin/riscv64-linux-gnu-gcc-12"to use the riscv enabled linker.