Makefile, better gitignore

.gitignore

@@ -1 +1,3 @@
 *.pyc
+*.o
+*.so

clients/c/Makefile

@@ -1,2 +1,13 @@
-test: test.c
-	gcc -g -I/usr/local/include -L/usr/local/lib -o test test.c  -lcurl -ljansson
+CC ?= gcc
+CFLAGS ?= -Wall -Werror -I/usr/local/include -fpic
+LDFLAGS ?= -Wall -L/usr/local/lib -L.
+LIBS ?= -lcurl -ljansson
+
+test: test.o libcosmopolite.so
+	$(CC) $(LDFLAGS) -o test test.o -lcosmopolite $(LIBS)
+
+libcosmopolite.so: cosmopolite.o
+	$(CC) -shared $(LDFLAGS) -o libcosmopolite.so cosmopolite.o
+
+%.o: %.c
+	$(CC) -c $(CFLAGS) $< -o $@