Merge pull request meta-rust#288 from YoeDistro/yoe/mut

Add riscv32/riscv64 support

recipes-devtools/rust/libstd-rs.inc

@@ -8,6 +8,10 @@ RUSTLIB_DEP = ""
 inherit cargo
 
 DEPENDS_append_libc-musl = " libunwind"
+# rv32 does not have libunwind ported yet
+DEPENDS_remove_riscv32 = "libunwind"
+DEPENDS_remove_riscv64 = "libunwind"
+
 # Needed so cargo can find libbacktrace
 RUSTFLAGS += "-L ${STAGING_LIBDIR} -C link-arg=-Wl,-soname,libstd.so"
 

recipes-devtools/rust/rust-llvm.inc

@@ -19,7 +19,7 @@ LLVM_DIR = "llvm${LLVM_RELEASE}"
 
 EXTRA_OECMAKE = " \
     -DCMAKE_BUILD_TYPE=Release \
-    -DLLVM_TARGETS_TO_BUILD='X86;ARM;AArch64;PowerPC;Mips' \
+    -DLLVM_TARGETS_TO_BUILD='ARM;AArch64;Mips;PowerPC;RISCV;X86' \
     -DLLVM_BUILD_DOCS=OFF \
     -DLLVM_ENABLE_TERMINFO=OFF \
     -DLLVM_ENABLE_ZLIB=OFF \

recipes-devtools/rust/rust.inc

@@ -97,7 +97,8 @@ def llvm_features_from_tune(d):
         f.append("+a15")
     if 'cortexa17' in feat:
         f.append("+a17")
-
+    if ('riscv64' in feat) or ('riscv32' in feat):
+        f.append("+a,+c,+d,+f,+m")
     return f
 
 # TARGET_CC_ARCH changes from build/cross/target so it'll do the right thing
@@ -291,6 +292,8 @@ def llvm_cpu(d):
     trans['powerpc'] = "powerpc"
     trans['mips64'] = "mips64"
     trans['mips64el'] = "mips64"
+    trans['riscv64'] = "generic-rv64"
+    trans['riscv32'] = "generic-rv32"
 
     if target in ["mips", "mipsel"]:
         feat = frozenset(d.getVar('TUNE_FEATURES').split())
@@ -337,6 +340,10 @@ def rust_gen_target(d, thing, wd, features, cpu):
         tspec['env'] = "musl"
     else:
         tspec['env'] = "gnu"
+    if "riscv64" in tspec['llvm-target']:
+        tspec['llvm-abiname'] = "lp64d"
+    if "riscv32" in tspec['llvm-target']:
+        tspec['llvm-abiname'] = "ilp32d"
     tspec['vendor'] = "unknown"
     tspec['target-family'] = "unix"
     tspec['linker'] = "{}{}gcc".format(d.getVar('CCACHE'), prefix)