# Eclipse, Mingw & SDL with Windows

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Hello, up to now I've been working with VS, but got employed last week to work on a Mac-Project. Because I don't know better, I decided to set up a C++ environment with eclipse, so that I can work with one IDE at work and at home without having to convert Project-Formats between VS and X Code. On Windows however I can't get the simplest SDL/OpenGL example compiled (which runs fine with VS 2008), because the linker tells me: C:\Programme\MinGW\lib/libmingw32.a(main.o):main.c:(.text+0x104): undefined reference to WinMain@16' A quick and dirty diagnosis: As far as I could find out on the Internet this has to do with the Project not being pure and proper Win32, meaning the compiler tries to create a console application. Sadly the Project creation dialog does not give me any options to influence this like in VS. I also been through the whole project settings dialogs and could not find anything that worked. Anyone familiar with eclipse with the mingw g++ compiler and what project settings checkbox/compiler parameter to set in order to get it right? Thx! CaptNeo

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You also have to use -lmingw32 as a linker flag to tell the linker to link to the mingw32 library. The order in which you link the libraries is important. This particular library has to be linked before the SDL libraries.

If you want a windows application without the console window you may also have to add -mwindows to the linker flags.

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Thx, I've tried it. The following is my console output:

**** Build of configuration Debug for project opengl_sdl2 ****

**** Internal Builder is used for build ****
g++ -IC:\Programme\MinGW\include\Development -O0 -g3 -Wall -c -fmessage-length=0 -osrc\opengl_sdl2.o ..\src\opengl_sdl2.cpp
g++ -LC:\Programme\MinGW\lib\Development\SDL -LC:\Programme\MinGW\lib -mwindows -oopengl_sdl2.exe src\opengl_sdl2.o -lmingw32 -lsdl -lopengl32 -lglu32
C:\Programme\MinGW\lib/libmingw32.a(main.o):main.c:(.text+0x104): undefined reference to WinMain@16'
collect2: ld returned 1 exit status
Build error occurred, build is stopped
Time consumed: 625 ms.

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Update: I've found, that sdlmain was missing. To make sure, I did not forget anything else, I've reshuffled the libs to confirm with an old VS project (should have done so in the first place for sure, sorry). So I get another error, which seems to be SDL specific:

**** Build of configuration Debug for project opengl_sdl2 ****

**** Internal Builder is used for build ****
g++ -LC:\Programme\MinGW\lib\Development\SDL -LC:\Programme\MinGW\lib -oopengl_sdl2.exe src\opengl_sdl2.o -lmingw32 -lopengl32 -lglu32 -lsdlmain -lsdl
C:\Programme\MinGW\lib\Development\SDL/libsdlmain.a(SDL_win32_main.o): In function console_main':
/Users/hercules/trunk/SDL-1.2/./src/main/win32/SDL_win32_main.c:246: undefined reference to SDL_main'
collect2: ld returned 1 exit status
Build error occurred, build is stopped
Time consumed: 235 ms.

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