Revert "Compile with opt-level 3, lto"

This reverts commit 68b3315673.

Cargo.toml

@@ -34,15 +34,3 @@ members = [
     "schemes/udpd",
     "syscall"
 ]
-
-[profile.dev]
-debug = true
-debug-assertions = true
-lto = false
-opt-level = 0
-
-[profile.release]
-debug = false
-debug-assertions = false
-lto = true
-opt-level = 3

mk/config.mk

@@ -21,7 +21,7 @@ BUILD=build/userspace
 RUSTC=./rustc.sh
 RUSTDOC=./rustdoc.sh
 CARGO=RUSTC="$(RUSTC)" RUSTDOC="$(RUSTDOC)" cargo
-CARGOFLAGS=--target $(TARGET) --release --
+CARGOFLAGS=--target $(TARGET) --release -- -C codegen-units=`nproc`
 
 # Per host variables
 UNAME := $(shell uname)

mk/kernel.mk

@@ -1,6 +1,6 @@
 $(KBUILD)/libcollections.rlib: rust/src/libcollections/Cargo.toml rust/src/libcollections/**
 	mkdir -p $(KBUILD)
-	$(KCARGO) rustc --manifest-path $< $(KCARGOFLAGS) -o $@
+	$(KCARGO) rustc --verbose --manifest-path $< $(KCARGOFLAGS) -o $@
 	cp rust/src/target/$(KTARGET)/release/deps/*.rlib $(KBUILD)
 
 $(KBUILD)/libkernel.a: kernel/Cargo.toml kernel/arch/** kernel/src/** $(KBUILD)/libcollections.rlib $(BUILD)/initfs.rs

mk/userspace/mod.mk

@@ -28,12 +28,12 @@ include mk/userspace/userutils.mk
 
 $(BUILD)/libstd.rlib: rust/src/libstd/Cargo.toml rust/src/libstd/**
 	mkdir -p $(BUILD)
-	$(CARGO) rustc --manifest-path $< --features "panic-unwind" $(CARGOFLAGS) -L native=libc-artifacts/usr/lib -o $@
+	$(CARGO) rustc --verbose --manifest-path $< --features "panic-unwind" $(CARGOFLAGS) -L native=libc-artifacts/usr/lib -o $@
 	cp rust/src/target/$(TARGET)/release/deps/*.rlib $(BUILD)
 
 $(BUILD)/libtest.rlib: rust/src/libtest/Cargo.toml rust/src/libtest/** $(BUILD)/libstd.rlib
 	mkdir -p $(BUILD)
-	$(CARGO) rustc --manifest-path $< $(CARGOFLAGS) -L native=libc-artifacts/usr/lib -o $@
+	$(CARGO) rustc --verbose --manifest-path $< $(CARGOFLAGS) -L native=libc-artifacts/usr/lib -o $@
 	cp rust/src/target/$(TARGET)/release/deps/*.rlib $(BUILD)
 
 filesystem/bin/%: programs/%/Cargo.toml programs/%/src/** $(BUILD)/libstd.rlib