add FITPACK Fortran library

start developing of FITPACK C++ bindings
mount_server.cpp: fix compilation error with GCC15

cxx/fitpack/Makefile

@@ -0,0 +1,19 @@
+# Makefile that builts a library lib$(LIB).a from all
+# of the Fortran files found in the current directory.
+# Usage: make LIB=<libname>
+# Pearu
+
+OBJ=$(patsubst %.f,%.o,$(shell ls *.f))
+all: lib$(LIB).a
+$(OBJ):
+	$(FC) -c $(FFLAGS) $(FSHARED) $(patsubst %.o,%.f,$(@F)) -o $@
+lib$(LIB).a: $(OBJ)
+	$(AR) rus lib$(LIB).a $?
+clean:
+	rm *.o
+
+
+
+
+
+