Merge branch 'simplify_kernel_build_recipe' into 'master'

Simplify kernel build recipe

See merge request redox-os/cookbook!301

recipes/kernel/recipe.toml

@@ -7,22 +7,15 @@ script = """
 export RUST_TARGET_PATH="${COOKBOOK_SOURCE}/targets"
 ARCH="$(echo "${TARGET}" | cut -d - -f1)"
 cargo rustc \
-	--lib \
+	--bin kernel \
 	--manifest-path "${COOKBOOK_SOURCE}/Cargo.toml" \
 	--target "${COOKBOOK_SOURCE}/targets/${ARCH}-unknown-kernel.json" \
 	--release \
 	-Z build-std=core,alloc \
 	-- \
 	-C soft-float \
-	-C debuginfo=2 \
-	-C lto \
-	--emit link="${PWD}/libkernel.a"
-"${TARGET}-ld" \
-	--gc-sections \
-	-z max-page-size=0x1000 \
-	-T "${COOKBOOK_SOURCE}/linkers/${ARCH}.ld" \
-	-o kernel.all \
-	libkernel.a
+	-C link-arg=-T -Clink-arg="${COOKBOOK_SOURCE}/linkers/${ARCH}.ld" \
+	--emit link="${PWD}/kernel.all"
 "${TARGET}-objcopy" \
 	--only-keep-debug \
 	kernel.all \