touch could be a useful test.

examples/coreutils/Makefile

@@ -0,0 +1,36 @@
+VERSION=8.31
+SRC=coreutils-${VERSION}
+TAR=${SRC}.tar.xz
+URL=https://ftp.gnu.org/gnu/coreutils/${TAR}
+
+
+all: touch.bc
+
+${TAR}:
+	wget ${URL}
+
+${SRC}: ${TAR}
+	tar xvf ${TAR}
+	touch ${SRC}
+
+
+${SRC}/Makefile: ${SRC}
+	cd ${SRC}; CC=gclang ./configure
+
+${SRC}/src/touch: ${SRC}/Makefile
+	cd ${SRC}; make
+	touch ${SRC}/src/touch
+
+touch.bc: ${SRC}/src/touch
+	get-bc -o touch.bc -m ${SRC}/src/touch
+
+touch_from_bitcode: touch.bc
+	clang++ touch.bc -o touch
+
+clean:
+	rm -rf touch  touch.bc  touch.bc.llvm.manifest
+	make -C ${SRC}
+
+spotless:
+	rm -rf ${SRC} ${TAR}
+