diff -r 813b44590d07 -r 1b21c78d8706 c++/sqlite-demo-modul/Makefile
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/c++/sqlite-demo-modul/Makefile	Fri May 08 00:02:05 2020 +0200
@@ -0,0 +1,20 @@
+all: libdemo.so
+
+libdemo.so: demo.cpp
+	g++ -g -shared -fPIC demo.cpp -o libdemo.so
+
+clean:
+	rm -f libdemo.so
+
+run: libdemo.so
+	echo "\
+	    SELECT 'load_extension',   load_extension('./libdemo.so'); \
+	    SELECT 'get_pid',          get_pid(); \
+	    SELECT 'value_count',      value_count(), value_count('a'), value_count('a', 'b'), value_count(1,2,3); \
+	    SELECT 'multiply',         multiply(2, 4); \
+	" | sqlite3
+
+info: libdemo.so
+	nm libdemo.so
+	ldd libdemo.so
+	file libdemo.so