undefined reference error can't resolve

[HammyW]

I am using Dev-C++ version 4.9.9.2 with windows XP and trying to make a game engine from code in a beginning game programming book. I have created a project with one header file and one source file and unable to compile. I've researched the other threads and still am confused. Any help appreciated, below is a copy of my compile log:

Compiler: Default compiler
Building Makefile: "C:\Dev-Cpp\Wayne\game\Makefile.win"
Executing make clean
rm -f GameEngine.o "game engine.exe"

g++.exe -DDEBUG -c GameEngine.cpp -o GameEngine.o -I"C:/Dev-Cpp/lib/gcc/mingw32/3.4.2/include" -I"C:/Dev-Cpp/include/c++/3.4.2/backward" -I"C:/Dev-Cpp/include/c++/3.4.2/mingw32" -I"C:/Dev-Cpp/include/c++/3.4.2" -I"C:/Dev-Cpp/include" -I"C:/Dev-Cpp/Wayne" -I"C:/Dev-Cpp/Wayne/game" -I"C:/Dev-Cpp/include" -I"C:/Dev-Cpp/Wayne/game" -g3

g++.exe -DDEBUG GameEngine.o -o "game engine.exe" -L"C:/Dev-Cpp/lib" -mwindows -g3

GameEngine.o(.text+0xd): In function ZN10GameEngine9SetWindowEP6HWND__': C:/Dev-Cpp/Wayne/game/GameEngine.h: undefined reference toGameInitialize(HINSTANCE*)'
GameEngine.o(.text+0xcf):C:/Dev-Cpp/Wayne/game/GameEngine.h: undefined reference to GameCycle()' GameEngine.o(.text+0xe1):C:/Dev-Cpp/Wayne/game/GameEngine.h: undefined reference toGameEnd()'
GameEngine.o(.text+0x5b7): In function ZN10GameEngine11HandleEventEP6HWND__jjl': C:/Dev-Cpp/Wayne/game/GameEngine.cpp:136: undefined reference toGameStart(HWND)'
GameEngine.o(.text+0x5ce):C:/Dev-Cpp/Wayne/game/GameEngine.cpp:140: undefined reference to GameActivate(HWND__*)' GameEngine.o(.text+0x5f8):C:/Dev-Cpp/Wayne/game/GameEngine.cpp:145: undefined reference toGameDeactivate(HWND__)'
GameEngine.o(.text+0x63a):C:/Dev-Cpp/Wayne/game/GameEngine.cpp:153: undefined reference to GamePaint(HDC__*)' GameEngine.o(.text+0x65d):C:/Dev-Cpp/Wayne/game/GameEngine.cpp:158: undefined reference toGameEnd()'
collect2: ld returned 1 exit status

make.exe: *** ["game] Error 1

Execution terminated

[Wayne Keen]

Errors of this kind come from failing to link the correct library.

In this case, I can't see where you tried to link any libraries.

There is a section in the thread titled "Please Read Before Posting a Question" that
covers the compile log, including headers, and linking libraries - it takes you through
the why's and how's.

Wayne

[Anonymous]

Read the next chapter of the book! http://www.gidforums.com/t-16228.html

Next time it would be a good idea to tell us what book you are using. Others with the same book might be able to help you. I am just guessing from the symbol names (all I did to find this was to Google "GameDeactivate" - a bit of lateral thinking when searching always helps).

Clifford

[HammyW]

I have moved on in same book and now am stumped with this message from compile log, I get a cannot create Makefile.win I/O error 32

Compiler: Default compiler
Building Makefile: "C:\Dev-Cpp\Wayne\game\Makefile.win"
Executing make clean
make.exe: *** No rule to make target `clean'. Stop.

Execution terminated

[Osito]

Try moving your project out of the dev-cpp folder. Although I don't think that's your problem.

[HammyW]

For some reason unknown to me that worked and I was able to compile after some minor tweaks - thanks
One more problem to solve and I think I'll be on my way. Here is my compiler log and a function that is supposed to draw icons in my window but nothing appears, does the icon file have to be a certain size?

Compiler: Default compiler
Building Makefile: "C:\game\Makefile.win"
Executing make clean
rm -f Blizzard.o GameEngine.o blizzard_private.res blizzard.exe

g++.exe -DDEBUG -c Blizzard.cpp -o Blizzard.o -I"C:/Dev-Cpp/lib/gcc/mingw32/3.4.2/include" -I"C:/Dev-Cpp/include/c++/3.4.2/backward" -I"C:/Dev-Cpp/include/c++/3.4.2/mingw32" -I"C:/Dev-Cpp/include/c++/3.4.2" -I"C:/Dev-Cpp/include" -I"C:/Dev-Cpp/Wayne" -I"C:/Dev-Cpp/Wayne/game" -I"C:/Dev-Cpp/include" -I"C:/Dev-Cpp/Wayne/game" -g3

g++.exe -DDEBUG -c GameEngine.cpp -o GameEngine.o -I"C:/Dev-Cpp/lib/gcc/mingw32/3.4.2/include" -I"C:/Dev-Cpp/include/c++/3.4.2/backward" -I"C:/Dev-Cpp/include/c++/3.4.2/mingw32" -I"C:/Dev-Cpp/include/c++/3.4.2" -I"C:/Dev-Cpp/include" -I"C:/Dev-Cpp/Wayne" -I"C:/Dev-Cpp/Wayne/game" -I"C:/Dev-Cpp/include" -I"C:/Dev-Cpp/Wayne/game" -g3

windres.exe -i blizzard_private.rc --input-format=rc -o blizzard_private.res -O coff

g++.exe -DDEBUG Blizzard.o GameEngine.o blizzard_private.res -o "blizzard.exe" -L"C:/Dev-Cpp/lib" -mwindows -g3

Execution terminated
Compilation successful

My Function:

void GameCycle()
{
HDC hDC;
HWND hWindow = g_pGame->GetWindow();
// Draw the snowflake icon at random positions on the game screen
hDC = GetDC(hWindow);
DrawIcon(hDC, rand() % g_pGame->GetWidth(), rand() % g_pGame->GetHeight(),
(HICON)GetClassLong(hWindow, GCL_HICON));
ReleaseDC(hWindow, hDC);
}

[Osito]

I haven't used DrawIcon() - you might want to check here and make sure you're calling it correctly:

http://msdn2.microsoft.com/en-us/library/ms648051.aspx

[Anonymous]

> For some reason unknown to me that worked ...

It is a strange but known bug of Dev-C++ that when you create a project win the Dev-C++ installation folder it may fail to build. I t is unfortunate that that is where Dev installs its own examples! Other than that I cant think of a good reason to create projects in a program's installation folder.

Clifford

[HammyW]

Thanks for the reply, the book I'm using is Beginning Game Programming by Michael Morrison. Thanks for that link Clifford it was the same problem I had and now it makes sense. The book didn't really explain that, anyway I'll move forward and hopefully have better luck.