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Old 02-18-2012, 04:13 AM   #1
sanehussain
LQ Newbie
 
Registered: Feb 2012
Posts: 1

Rep: Reputation: Disabled
Compiling a C program with openGL, GLEW and GTK in ubuntu.


I am writing a C program, which uses openGL and GTK for the GUI(There are 2 separate windows). It also uses GLEW. Currently I am using the following command to compile it:

gcc `pkg-config --cflags --libs gtk+-2.0` main.cpp -o hello -lglut -lGL -lGLEW

And these are the errors I am getting:

/tmp/cca4mYJB.o: In function `initGuiWindow()':
main.cpp:(.text+0xf8): undefined reference to `gtk_builder_new'
main.cpp:(.text+0x11a): undefined reference to `gtk_builder_add_from_file'
main.cpp:(.text+0x11f): undefined reference to `gtk_widget_get_type'
main.cpp:(.text+0x136): undefined reference to `gtk_builder_get_object'
main.cpp:(.text+0x142): undefined reference to `g_type_check_instance_cast'
main.cpp:(.text+0x15c): undefined reference to `gtk_builder_connect_signals'
/tmp/cca4mYJB.o: In function `show()':
main.cpp:(.text+0x175): undefined reference to `gtk_widget_show'
/tmp/cca4mYJB.o: In function `on_btn_color_color_set(_GtkColorButton*, void*)':
main.cpp:(.text+0x9b6): undefined reference to `gtk_color_button_get_color'
/tmp/cca4mYJB.o: In function `on_circ_segments_value_changed(_GtkSpinButton*, void*)':
main.cpp:(.text+0xb9a): undefined reference to `gtk_spin_button_get_value'
/tmp/cca4mYJB.o: In function `guiSetStatusbarText(char const*)':
main.cpp:(.text+0xc29): undefined reference to `gtk_statusbar_push'
/tmp/cca4mYJB.o: In function `get_statusbar()':
main.cpp:(.text+0xc4b): undefined reference to `gtk_builder_get_object'
/tmp/cca4mYJB.o: In function `get_message_context_id(_GtkStatusbar*)':
main.cpp:(.text+0xc66): undefined reference to `gtk_statusbar_get_context_id'
/tmp/cca4mYJB.o: In function `clear_statusbar_text_private(_GtkStatusbar*, int)':
main.cpp:(.text+0xc94): undefined reference to `gtk_statusbar_remove'
/tmp/cca4mYJB.o: In function `guiInit(int*, char**)':
main.cpp:(.text+0xcb8): undefined reference to `gtk_init'
/tmp/cca4mYJB.o: In function `guiMainIteration()':
main.cpp:(.text+0xccc): undefined reference to `gtk_main_iteration_do'
/tmp/cca4mYJB.o: In function `__static_initialization_and_destruction_0(int, int)':
main.cpp:(.text+0xcef): undefined reference to `operator new[](unsigned int)'
collect2: ld returned 1 exit status


I don't know what mistake I am making. Can somebody please help me out?
 
Old 02-18-2012, 09:07 PM   #2
Dark_Helmet
Senior Member
 
Registered: Jan 2003
Posts: 2,786

Rep: Reputation: 372Reputation: 372Reputation: 372Reputation: 372
Well, because nobody else has responded...

Quote:
gcc `pkg-config --cflags --libs gtk+-2.0` main.cpp -o hello -lglut -lGL -lGLEW
Quote:
Code:
main.cpp:(.text+0xcef): undefined reference to `operator new[](unsigned int)'
I don't use gcc to compile C++ code. When I say "gcc" I mean the specific executable--not the compiler collection.

I always use g++ to compile C++ code. The g++ executable should come with your gcc install. And, given that the linker is complaining about the "new" operator (a fundamental C++ operator), it seems like there's a basic/fundamental issue (e.g. using an incorrect compiler).

Try with g++ and see where it gets you.

There may be some relationship between gcc and g++ (apart from being in the same compiler collection). For instance, g++ may simply be gcc with a specific set of command line options automatically applied. Though, I'm not familiar enough with them to say there is or is not such a relationship.
 
  


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