[examples/counter.jai] statically link coroutines library

Author: rexim

Makefile

@@ -15,13 +15,16 @@ build/counter_c3: examples/counter.c3 coroutine.c3 build/coroutine.o
 	cp build/coroutine.o build/counter.coroutine.o # c3c deletes the object files for some reason, so we make a copy to preserve the original
 	c3c compile -o build/counter_c3 examples/counter.c3 coroutine.c3 build/counter.coroutine.o
 
-build/counter_jai: examples/counter.jai build/coroutine.so
+build/counter_jai: examples/counter.jai build/coroutine.a build/coroutine.so
 	jai-linux examples/counter.jai
 
 build/coroutine.so: coroutine.c
+	mkdir -p build
 	gcc -Wall -Wextra -ggdb -shared -fPIC -o build/coroutine.so coroutine.c
 
+build/coroutine.a: build/coroutine.o
+	ar -rcs build/coroutine.a build/coroutine.o
+
 build/coroutine.o: coroutine.c coroutine.h
 	mkdir -p build
 	gcc -Wall -Wextra -ggdb -c -o build/coroutine.o coroutine.c
-