changed the way of building in Makefiles

tests/Makefile

@@ -11,27 +11,23 @@ CXXFLAGS = -Wall -pedantic -O2 -std=c++20 -I../src -I/usr/local/include
 endif
 
 
-
 progname = tests
+pikotoolslibfile = ../src/pikotools.a
 
 
-all: $(progname) pikotools
+all: $(progname)
 
 
-$(progname): $(objfiles) pikotools
-	$(CXX) $(CXXFLAGS) -o $(progname) $(objfiles) ../src/pikotools.a
+$(progname): $(objfiles) FORCE
+	$(CXX) $(CXXFLAGS) -o $(progname) $(objfiles) $(pikotoolslibfile)
 
 
 %.o: %.cpp
 	$(CXX) -c $(CXXFLAGS) -o $@ $<
 
 
-pikotools: FORCE
-	$(MAKE) -C ../src
 
 
-FORCE:
-
 
 clean:
 	rm -f $(objfiles)
@@ -42,5 +38,8 @@ depend:
 	makedepend -Y. -I../src -f- $(sourcefiles) > Makefile.dep
 
 
+FORCE:
+
+
 -include Makefile.dep