Use the more modern Makefile syntax

certik · certik · commit 801ee61d4f4e · 2020-01-02T14:29:30.000-07:00
diff --git a/src/Makefile.manual b/src/Makefile.manual
@@ -8,7 +8,7 @@ OBJS = stdlib_experimental_ascii.o \
 
 all: $(OBJS)
 
-.f90.o:
+%.o: %.f90
 	$(FC) $(FCFLAGS) -c $<
 
 %.o: %.mod
