Hello all,
I'm writing a simple realtime module to learn how to compile and use C++
code. I include the files that I'm using:
- rtmatrix.h and rtmatrix.cpp will define the class that I want to handle,
at the moment they just define the A and C classes of the cpp example.
- rtmodule.cpp is a realtime module generated by the next release of DSLib,
v1.3. It's generated from an empty dynamic system so it does nothing.
- Makefile is a slight modification of cpp-example's makefile, which
compiles rtmodule.cpp instead of hello.cpp and includes rtmatrix.o in linking.
All this compiles fine, the problem is I get the following error when
installing app.o:
Now start the real-time tasks module
Type <return> to continue
app.o: unresolved symbol rtl_printf__FPCce
make: *** [test] Error 1
rtmatrix.cpp includes rtl_printf.h and is compiled the same way than
rtmodule.cpp (which I can't understand as I said in my last posting). Do you
know what the problem is?.
Regards,
Ivan Martinez
class A {
protected:
int a;
public:
virtual void print()=0;
A();
virtual ~A();
};
class B : public A
{
public:
B();
~B();
virtual void print();
};
#include "rtmatrix.h"
#include <rtl_printf.h>
A::A()
{
a = 1;
rtl_printf("initializing A\n");
}
A::~A()
{
rtl_printf("uninitializing A\n");
}
B::B()
{
a = 1;
rtl_printf("initializing B\n");
}
B::~B()
{
rtl_printf("uninitializing B\n");
}
void B::print()
{
rtl_printf("B::print: %d\n", a);
}
#include "rtmatrix.h"
#include <rtl_cpp.h>
hrtime_t start_time;
char run;
void system_vars_init(void)
{
}
void start_execution(void)
{
system_vars_init();
run = 1;
start_time = gethrtime();
}
void stop_execution(void)
{
run = 0;
}
int init_module(void)
{
__do_global_ctors_aux();
start_execution();
return 0;
}
void cleanup_module(void)
{
stop_execution();
__do_global_dtors_aux();
}
all: app.o rtl_cpp.o rtmatrix.o
include /usr/src/rtlinux-3.1/rtl.mk
CRTBEGIN=`g++ -print-file-name=crtbegin.o`
CRTEND=`g++ -print-file-name=crtend.o`
app.o: rtmodule.o rtmatrix.o
echo $(LD)
echo $(CRTBEGIN)
echo $(CRTEND)
$(LD) -r -o app.o $(CRTBEGIN) rtmodule.o rtmatrix.o $(CRTEND)
clean:
rm -f *.o
test: all
@echo "This is a simple RTLinux program"
@echo "First we remove any existing rtl-modules"
@echo "You may see error warnings from \"make\" - ignore them"
@echo "Type <return> to continue"
@read junk
-rmmod sound
-rmmod rt_process
-rmmod frank_module
-rmmod rtl_cpp
(cd $(RTL_DIR); scripts/rmrtl)
@echo "Now insert the fifo and scheduler"
@echo "Type <return> to continue"
@read junk
(cd $(RTL_DIR); scripts/insrtl)
@echo "Now insert the C++ support module"
insmod rtl_cpp.o
@echo "Now start the real-time tasks module"
@echo "Type <return> to continue"
@read junk
@insmod app.o
@sleep 3
@echo "Now let's stop the application"
@echo "Type <return> to finish"
@read junk
@rmmod app
@rmmod rtl_cpp
include $(RTL_DIR)/Rules.make
