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build: Allow building C compiler-rt fallbacks for RISC-V

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Now that https://github.com/rust-lang/rust/pull/117654 has been merged
the rust-lang/rust distribution containers contain RISC-V C compilers.

This means that we can now enable the "c" feature fallback.

Resolves: https://github.com/rust-lang/compiler-builtins/issues/350
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Alistair Francis 2023-12-20 09:30:11 +10:00
parent 72dbe301ff
commit e898296fd9
1 changed files with 2 additions and 7 deletions
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9
library/compiler-builtins/build.rs
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@ -59,12 +59,7 @@ fn main() {
// * wasm - clang for wasm is somewhat hard to come by and it's // * wasm - clang for wasm is somewhat hard to come by and it's
// unlikely that the C is really that much better than our own Rust. // unlikely that the C is really that much better than our own Rust.
// * nvptx - everything is bitcode, not compatible with mixed C/Rust // * nvptx - everything is bitcode, not compatible with mixed C/Rust
// * riscv - the rust-lang/rust distribution container doesn't have a C if !target.contains("wasm") && !target.contains("nvptx") {
// compiler.
if !target.contains("wasm")
&& !target.contains("nvptx")
&& (!target.starts_with("riscv") || target.contains("xous"))
{
#[cfg(feature = "c")] #[cfg(feature = "c")]
c::compile(&llvm_target, &target); c::compile(&llvm_target, &target);
} }
@ -519,7 +514,7 @@ mod c {
} }
} }
if target_arch == "mips" { if target_arch == "mips" || target_arch == "riscv32" || target_arch == "riscv64" {
sources.extend(&[("__bswapsi2", "bswapsi2.c")]); sources.extend(&[("__bswapsi2", "bswapsi2.c")]);
} }