--- build	2026-04-14 04:52:27
+++ build	2026-05-03 21:06:47
@@ -5,7 +5,12 @@
 
 TARGET="$1" # Example: riscv64-linux-gnu
 MCPU="$2" # Examples: `baseline`, `native`, `generic+v7a`, or `arm1176jzf_s`
+JOBS="${3:-}" # Optional: number of parallel jobs
 
+if [ -z "$JOBS" ]; then
+  JOBS="$(getconf _NPROCESSORS_ONLN 2>/dev/null || nproc 2>/dev/null || sysctl -n hw.ncpu 2>/dev/null || echo 1)"
+fi
+
 ROOTDIR="$(pwd)"
 ZIG_VERSION="0.16.0"
 
@@ -56,7 +61,7 @@
   -DCLANG_TOOL_CLANG_LINKER_WRAPPER_BUILD=OFF \
   -DCLANG_TOOL_C_INDEX_TEST_BUILD=OFF \
   -DCLANG_TOOL_LIBCLANG_BUILD=OFF
-cmake --build . --target install
+cmake --build . --target install --parallel "$JOBS"
 
 # Now we build Zig, still with system C/C++ compiler, linking against LLVM,
 # Clang, LLD we just built from source.
@@ -67,7 +72,7 @@
   -DCMAKE_PREFIX_PATH="$ROOTDIR/out/host" \
   -DCMAKE_BUILD_TYPE=Release \
   -DZIG_VERSION="$ZIG_VERSION"
-cmake --build . --target install
+cmake --build . --target install --parallel "$JOBS"
 
 # Now we have Zig as a cross compiler.
 ZIG="$ROOTDIR/out/host/bin/zig"
@@ -89,7 +94,7 @@
   -DCMAKE_RC_COMPILER="$ROOTDIR/out/host/bin/llvm-rc" \
   -DCMAKE_AR="$ROOTDIR/out/host/bin/llvm-ar" \
   -DCMAKE_RANLIB="$ROOTDIR/out/host/bin/llvm-ranlib"
-cmake --build . --target install
+cmake --build . --target install --parallel "$JOBS"
 
 # Same deal for zstd.
 # The build system for zstd is whack so I just put all the files here.
@@ -97,6 +102,7 @@
 cp "$ROOTDIR/zstd/lib/zstd.h" "$ROOTDIR/out/$TARGET-$MCPU/include/zstd.h"
 cd "$ROOTDIR/out/$TARGET-$MCPU/lib"
 $ZIG build-lib \
+  -j"$JOBS" \
   --name zstd \
   -target $TARGET \
   -mcpu=$MCPU \
@@ -190,11 +196,12 @@
   -DCLANG_TOOL_C_INDEX_TEST_BUILD=OFF \
   -DCLANG_TOOL_LIBCLANG_BUILD=OFF \
   -DLLD_BUILD_TOOLS=OFF
-cmake --build . --target install
+cmake --build . --target install --parallel "$JOBS"
 
 # Finally, we can cross compile Zig itself, with Zig.
 cd "$ROOTDIR/zig"
 $ZIG build \
+  -j"$JOBS" \
   --prefix "$ROOTDIR/out/zig-$TARGET-$MCPU" \
   --search-prefix "$ROOTDIR/out/$TARGET-$MCPU" \
   -Dflat \
