Added rustc.temporary target

Makefile

@@ -30,6 +30,54 @@ all: config-toml
 	swapoff swap
 	rm -rf swap
 
+temporary:
+	dd if=/dev/zero of=swap bs=1048576 count=2048
+	chmod 600 swap
+	mkswap swap
+	swapon swap
+
+	tar xf rustc-1.47.0-src.tar.gz
+	mkdir rustc-home
+
+	if [ `uname -m` = "armv7l" ]; then \
+	    echo "$$CONFIG_TOML" | sed "s/\/usr/\/build\/usr/" | sed "s/TARGET/ARM/" > rustc-1.47.0-src/config.toml ; \
+	elif [ `uname -m` = "aarch64" ]; then \
+	    echo "$$CONFIG_TOML" | sed "s/\/usr/\/build\/usr/" | sed "s/TARGET/AArch64/" > rustc-1.47.0-src/config.toml ; \
+	else \
+	    echo "$$CONFIG_TOML" | sed "s/\/usr/\/build\/usr/" | sed "s/TARGET/X86/" > rustc-1.47.0-src/config.toml ; \
+	    ln -s /lib /lib64 ; \
+	fi
+
+	cd rustc-1.47.0-src && HOME=$(CURDIR)/rustc-home python3 ./x.py build
+	-cd rustc-1.47.0-src && HOME=$(CURDIR)/rustc-home python3 ./x.py test --verbose --no-fail-fast
+	cd rustc-1.47.0-src && HOME=$(CURDIR)/rustc-home python3 ./x.py install
+
+	if [ `uname -m` = "armv7l" ]; then \
+	    cp rustc-1.47.0-src/build/x86_64-unknown-linux-gnu/llvm/bin/* /build/usr/bin ; \
+	    cp rustc-1.47.0-src/build/x86_64-unknown-linux-gnu/llvm/lib/* /build/usr/lib ; \
+	elif [ `uname -m` = "aarch64" ]; then \
+	    cp rustc-1.47.0-src/build/x86_64-unknown-linux-gnu/llvm/bin/* /build/usr/bin ; \
+	    cp rustc-1.47.0-src/build/x86_64-unknown-linux-gnu/llvm/lib/* /build/usr/lib ; \
+	else \
+	    cp rustc-1.47.0-src/build/x86_64-unknown-linux-gnu/llvm/bin/* /build/usr/bin ; \
+	    cp rustc-1.47.0-src/build/x86_64-unknown-linux-gnu/llvm/lib/* /build/usr/lib ; \
+	    rm -rf /lib64 ; \
+	fi
+
+	swapoff swap
+	rm -rf swap
+
+	echo "/build/usr/lib" >> /etc/ld.so.conf
+	ldconfig
+
+clean:
+	rm -rf rustc-home
+	rm -rf rustc-1.47.0-src
+	rm -rf /build/usr
+	rm -f /etc/bash_completion.d/cargo
+	sed '/^\/build\/usr\/lib/d' -i /etc/ld.so.conf
+	ldconfig
+
 config-toml:
 define CONFIG_TOML
 [llvm]