lol
1--- a/run_rustc/Makefile
2+++ b/run_rustc/Makefile
3@@ -79,14 +79,14 @@
4 @mkdir -p $(OUTDIR)build-std
5 @mkdir -p $(LIBDIR)
6 @echo [CARGO] $(RUST_SRC)libstd/Cargo.toml
7- $VCARGO_TARGET_DIR=$(OUTDIR)build-std RUSTC=$(BINDIR_S)rustc $(CARGO_ENV) $(BINDIR)cargo build --manifest-path $(RUST_SRC)libstd/Cargo.toml -j 1 --release --features panic-unwind
8+ $VCARGO_TARGET_DIR=$(OUTDIR)build-std RUSTC=$(BINDIR_S)rustc $(CARGO_ENV) $(BINDIR)cargo build --manifest-path $(RUST_SRC)libstd/Cargo.toml -j $(NIX_BUILD_CORES) --release --features panic-unwind
9 $Vcp --remove-destination $(OUTDIR)build-std/release/deps/*.rlib $(LIBDIR)
10 $Vcp --remove-destination $(OUTDIR)build-std/release/deps/*.so $(LIBDIR)
11 # libtest
12 $(LIBDIR)libtest.rlib: $(BINDIR)rustc_m $(LIBDIR)libstd.rlib $(CARGO_HOME)config
13 @mkdir -p $(OUTDIR)build-test
14 @echo [CARGO] $(RUST_SRC)libtest/Cargo.toml
15- $VCARGO_TARGET_DIR=$(OUTDIR)build-test RUSTC=$(BINDIR)rustc_m $(CARGO_ENV) $(BINDIR)cargo build --manifest-path $(RUST_SRC)libtest/Cargo.toml -j 1 --release
16+ $VCARGO_TARGET_DIR=$(OUTDIR)build-test RUSTC=$(BINDIR)rustc_m $(CARGO_ENV) $(BINDIR)cargo build --manifest-path $(RUST_SRC)libtest/Cargo.toml -j $(NIX_BUILD_CORES) --release
17 @mkdir -p $(LIBDIR)
18 $Vcp --remove-destination $(OUTDIR)build-test/release/deps/*.rlib $(LIBDIR)
19 $Vcp --remove-destination $(OUTDIR)build-test/release/deps/*.so $(LIBDIR)
20@@ -95,7 +95,7 @@
21 $(BINDIR)rustc: $(BINDIR)rustc_m $(BINDIR)cargo $(CARGO_HOME)config $(LIBDIR)libtest.rlib
22 @mkdir -p $(PREFIX)tmp
23 @echo [CARGO] $(RUST_SRC)rustc/Cargo.toml
24- $V$(RUSTC_ENV_VARS) TMPDIR=$(abspath $(PREFIX)tmp) CARGO_TARGET_DIR=$(OUTDIR)build-rustc RUSTC=$(BINDIR)rustc_m RUSTC_ERROR_METADATA_DST=$(abspath $(PREFIX)) $(CARGO_ENV) $(BINDIR)cargo build --manifest-path $(RUST_SRC)rustc/Cargo.toml --release -j 1
25+ $V$(RUSTC_ENV_VARS) TMPDIR=$(abspath $(PREFIX)tmp) CARGO_TARGET_DIR=$(OUTDIR)build-rustc RUSTC=$(BINDIR)rustc_m RUSTC_ERROR_METADATA_DST=$(abspath $(PREFIX)) $(CARGO_ENV) $(BINDIR)cargo build --manifest-path $(RUST_SRC)rustc/Cargo.toml --release -j $(NIX_BUILD_CORES)
26 cp $(OUTDIR)build-rustc/release/deps/*.so $(LIBDIR)
27 cp $(OUTDIR)build-rustc/release/deps/*.rlib $(LIBDIR)
28 ifeq ($(RUSTC_VERSION),1.19.0)