I'm getting a linker error I don't understand with VC++ and FLTK

Question

I'm trying to create a new project with FLTK and VC++2010. I haven't done this in a while. I set up the properties by memory as best I could. I'm getting a linker error though. Can anyone tell me how to fix this?

1>------ Build started: Project: BJST chap 14 ex 1a, Configuration: Debug Win32 ------ 
1>  BJST chap 14 ex 1.cpp 
1>c:\users\bryan\documents\visual studio 2010\projects\bjst chap 14 ex 1a\bjst chap 14 ex 1a\bjst chap 14 ex 1.cpp(10): error C2065: 'FL_Window' : undeclared identifier
1>c:\users\bryan\documents\visual studio 2010\projects\bjst chap 14 ex 1a\bjst chap 14 ex 1a\bjst chap 14 ex 1.cpp(10): error C2146: syntax error : missing ';' before identifier 'window'
1>c:\users\bryan\documents\visual studio 2010\projects\bjst chap 14 ex 1a\bjst chap 14 ex 1a\bjst chap 14 ex 1.cpp(10): error C3861: 'window': identifier not found
1>c:\users\bryan\documents\visual studio 2010\projects\bjst chap 14 ex 1a\bjst chap 14 ex 1a\bjst chap 14 ex 1.cpp(12): error C2065: 'FL_Box' : undeclared identifier 
1>c:\users\bryan\documents\visual studio 2010\projects\bjst chap 14 ex 1a\bjst chap 14 ex 1a\bjst chap 14 ex 1.cpp(12): error C2146: syntax error : missing ';' before identifier 'box'
1>c:\users\bryan\documents\visual studio 2010\projects\bjst chap 14 ex 1a\bjst chap 14 ex 1a\bjst chap 14 ex 1.cpp(12): error C3861: 'box': identifier not found 
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ========== 


#include <FL/Fl.H>
#include <FL/Fl_Box.H>
#include <FL/Fl_Window.H>



int main ()
{

    FL_Window window(200, 200, "window title");

    FL_Box box();

return 0;
}

'missing ';' before identifier 'box'` isn't a **linker** error! — πάντα ῥεῖ, May 14 '14 at 20:17
Did you forget `#include `? Or maybe the FLTK types belong to some namespace, and you need to qualify them. Anyway, none of those are linker errors. — Praetorian, May 14 '14 at 20:17
I"m using box and window and you can see they are both included. — user3638297, May 14 '14 at 20:20

score 1 · Answer 1 · answered May 14 '14 at 20:44

This error message

error C2065: 'FL_Window' : undeclared identifier

means that the compiler did not find the declaration of identifier FL_Window. it is posiible (and I think that it is indeed so) that this name is declared in some namespace provided that you typed it correctly. Check header file <FL/Fl_Window.H> whether this name is declared in some namespace. In this case you have to write at least as

TheNameSpace::FL_Window window(200, 200, "window title");

where instead of TheNameSpace write the namespace where name FL_Window is declared.

It seems that there is also the same problem with identifier FL_Box

Spot on. BTW, FLTK1 has no name-space... FLTK2 does. – DejanLekic May 15 '14 at 08:22 — DejanLekic, May 15 '14 at 08:22

I'm getting a linker error I don't understand with VC++ and FLTK

1 Answers1