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Revert "Revert "reinstate riscv32i"" 

Custom rustc targets with JSON come with a messed up TARGET environment variable and lots of things break.

This reverts commit b22d85ba52.
This commit is contained in:
Sebastien Bourdeauducq 2019-06-08 19:31:41 +08:00
parent 8388018db7
commit 033659344f
2 changed files with 70 additions and 0 deletions
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67
compilers/rustc-riscv32i.patch Normal file
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@ -0,0 +1,67 @@
commit 23c32a1597df69083f4fa6fb932410cb342e266e
Author: Sebastien Bourdeauducq <sb@m-labs.hk>
Date: Tue Apr 9 00:15:31 2019 +0800
add riscv32i
diff --git a/src/librustc_target/spec/mod.rs b/src/librustc_target/spec/mod.rs
index 46fefd78f4..181342db7d 100644
--- a/src/librustc_target/spec/mod.rs
+++ b/src/librustc_target/spec/mod.rs
@@ -465,6 +465,7 @@ supported_targets! {
("aarch64-unknown-hermit", aarch64_unknown_hermit),
("x86_64-unknown-hermit", x86_64_unknown_hermit),
+ ("riscv32i-unknown-none-elf", riscv32i_unknown_none_elf),
("riscv32imc-unknown-none-elf", riscv32imc_unknown_none_elf),
("riscv32imac-unknown-none-elf", riscv32imac_unknown_none_elf),
("riscv64imac-unknown-none-elf", riscv64imac_unknown_none_elf),
diff --git a/src/librustc_target/spec/riscv32i_unknown_none_elf.rs b/src/librustc_target/spec/riscv32i_unknown_none_elf.rs
new file mode 100644
index 0000000000..a015e16d93
--- /dev/null
+++ b/src/librustc_target/spec/riscv32i_unknown_none_elf.rs
@@ -0,0 +1,31 @@
+use crate::spec::{LinkerFlavor, LldFlavor, PanicStrategy,
+ Target, TargetOptions, TargetResult};
+
+pub fn target() -> TargetResult {
+ Ok(Target {
+ data_layout: "e-m:e-p:32:32-i64:64-n32-S128".to_string(),
+ llvm_target: "riscv32".to_string(),
+ target_endian: "little".to_string(),
+ target_pointer_width: "32".to_string(),
+ target_c_int_width: "32".to_string(),
+ target_os: "none".to_string(),
+ target_env: String::new(),
+ target_vendor: "unknown".to_string(),
+ arch: "riscv32".to_string(),
+ linker_flavor: LinkerFlavor::Lld(LldFlavor::Ld),
+
+ options: TargetOptions {
+ linker: Some("rust-lld".to_string()),
+ cpu: "generic-rv32".to_string(),
+ max_atomic_width: Some(32),
+ atomic_cas: true,
+ features: "-m,-a,-c".to_string(),
+ executables: true,
+ panic_strategy: PanicStrategy::Abort,
+ relocation_model: "static".to_string(),
+ emit_debug_gdb_scripts: false,
+ abi_blacklist: super::riscv_base::abi_blacklist(),
+ .. Default::default()
+ },
+ })
+}
diff --git a/src/tools/build-manifest/src/main.rs b/src/tools/build-manifest/src/main.rs
index 61cc78ad80..4364ef41f9 100644
--- a/src/tools/build-manifest/src/main.rs
+++ b/src/tools/build-manifest/src/main.rs
@@ -92,6 +92,7 @@ static TARGETS: &[&str] = &[
"powerpc-unknown-linux-gnu",
"powerpc64-unknown-linux-gnu",
"powerpc64le-unknown-linux-gnu",
+ "riscv32i-unknown-none-elf",
"riscv32imc-unknown-none-elf",
"riscv32imac-unknown-none-elf",
"riscv64imac-unknown-none-elf",

3
overlay.nix
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@ -4,4 +4,7 @@ self: super:
name = oa.name + "-riscv";
cmakeFlags = oa.cmakeFlags ++ ["-DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD=RISCV"];
});
rustc = super.rustc.overrideAttrs(oa: {
patches = oa.patches ++ [ ./compilers/rustc-riscv32i.patch ];
});
}