I am working with a directx game in microsoft Visual C++. I tried to compile it with Dev-c++ and got tons of errors (no problem compiling in VC++). So, would someone with experience using devcpp please help me understand the difference and how to solve the problem? For those who doesn''t know about devcpp check out http://www.bloodshed.net/devcpp.html (it''s free stuff, thats why i like it ) Error messages: ompilator: Default compiler Building Makefile: "C:\Dev-Cpp\Mupp\Makefile.win" Kör make... make.exe -f "C:\Dev-Cpp\Mupp\Makefile.win" all g++.exe -c E:/Coding/Tanya/Projektarbete/Projekt.cpp -o E:/Coding/Tanya/Projektarbete/Projekt.o -I"C:/Dev-Cpp/include" -I"C:/Dev-Cpp/include" -I"E:/Coding/DXSDK9.0/Include" In file included from C:/Dev-Cpp/include/objbase.h:58, from E:/Coding/DXSDK9.0/Include/ddraw.h:36, from E:/Coding/Tanya/Projektarbete/Projekt.cpp:2: C:/Dev-Cpp/include/unknwn.h:27: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/unknwn.h:27: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/unknwn.h:41: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/unknwn.h:41: warning: `com_interface'' attribute directive ignored In file included from C:/Dev-Cpp/include/objbase.h:59, from E:/Coding/DXSDK9.0/Include/ddraw.h:36, from E:/Coding/Tanya/Projektarbete/Projekt.cpp:2: C:/Dev-Cpp/include/objidl.h:411: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:411: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:412: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:412: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:413: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:413: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:414: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:414: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:415: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:415: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:416: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:416: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:417: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:417: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:418: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:418: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:419: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:419: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:431: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:431: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:452: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:452: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:468: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:468: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:479: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:479: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:495: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:495: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:517: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:517: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:530: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:530: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:541: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:541: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:556: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:556: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:573: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:573: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:593: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:593: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:623: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:623: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:640: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:640: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:656: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:656: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:671: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:671: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:687: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:687: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:706: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:706: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:720: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:720: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:745: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:745: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:756: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:756: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:771: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:771: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:784: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:784: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:801: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:801: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:813: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:813: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:830: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:830: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:842: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:842: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:857: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:857: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:868: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:868: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:884: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:884: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:906: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:906: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:920: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:920: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:933: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:933: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:947: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:947: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:958: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:958: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:972: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:972: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:983: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:983: warning: `com_interface'' attribute directive ignored C:/Dev-Cpp/include/objidl.h:997: `com_interface'' only supported with -fvtable-thunks C:/Dev-Cpp/include/objidl.h:997: warning: `com_interface'' attribute directive ignored In file included from E:/Coding/Tanya/Projektarbete/Projekt.cpp:2: E:/Coding/DXSDK9.0/Include/ddraw.h:999: `com_interface'' only supported with -fvtable-thunks E:/Coding/DXSDK9.0/Include/ddraw.h:999: warning: `com_interface'' attribute directive ignored E:/Coding/DXSDK9.0/Include/ddraw.h:1085: `com_interface'' only supported with -fvtable-thunks E:/Coding/DXSDK9.0/Include/ddraw.h:1085: warning: `com_interface'' attribute directive ignored E:/Coding/DXSDK9.0/Include/ddraw.h:1177: `com_interface'' only supported with -fvtable-thunks E:/Coding/DXSDK9.0/Include/ddraw.h:1177: warning: `com_interface'' attribute directive ignored E:/Coding/DXSDK9.0/Include/ddraw.h:1279: `com_interface'' only supported with -fvtable-thunks E:/Coding/DXSDK9.0/Include/ddraw.h:1279: warning: `com_interface'' attribute directive ignored E:/Coding/DXSDK9.0/Include/ddraw.h:1364: `com_interface'' only supported with -fvtable-thunks E:/Coding/DXSDK9.0/Include/ddraw.h:1364: warning: `com_interface'' attribute directive ignored E:/Coding/DXSDK9.0/Include/ddraw.h:1406: `com_interface'' only supported with -fvtable-thunks E:/Coding/DXSDK9.0/Include/ddraw.h:1406: warning: `com_interface'' attribute directive ignored E:/Coding/DXSDK9.0/Include/ddraw.h:1478: `com_interface'' only supported with -fvtable-thunks E:/Coding/DXSDK9.0/Include/ddraw.h:1478: warning: `com_interface'' attribute directive ignored E:/Coding/DXSDK9.0/Include/ddraw.h:1605: `com_interface'' only supported with -fvtable-thunks E:/Coding/DXSDK9.0/Include/ddraw.h:1605: warning: `com_interface'' attribute directive ignored E:/Coding/DXSDK9.0/Include/ddraw.h:1740: `com_interface'' only supported with -fvtable-thunks E:/Coding/DXSDK9.0/Include/ddraw.h:1740: warning: `com_interface'' attribute directive ignored E:/Coding/DXSDK9.0/Include/ddraw.h:1883: `com_interface'' only supported with -fvtable-thunks E:/Coding/DXSDK9.0/Include/ddraw.h:1883: warning: `com_interface'' attribute directive ignored E:/Coding/DXSDK9.0/Include/ddraw.h:2041: `com_interface'' only supported with -fvtable-thunks E:/Coding/DXSDK9.0/Include/ddraw.h:2041: warning: `com_interface'' attribute directive ignored E:/Coding/DXSDK9.0/Include/ddraw.h:2161: `com_interface'' only supported with -fvtable-thunks E:/Coding/DXSDK9.0/Include/ddraw.h:2161: warning: `com_interface'' attribute directive ignored E:/Coding/DXSDK9.0/Include/ddraw.h:2195: `com_interface'' only supported with -fvtable-thunks E:/Coding/DXSDK9.0/Include/ddraw.h:2195: warning: `com_interface'' attribute directive ignored E:/Coding/Tanya/Projektarbete/Projekt.cpp: In function `int LoadHeroAnimation()'': E:/Coding/Tanya/Projektarbete/Projekt.cpp:677: name lookup of `AnimToLoad'' changed for new ANSI `for'' scoping E:/Coding/Tanya/Projektarbete/Projekt.cpp:661: using obsolete binding at `AnimToLoad'' E:/Coding/Tanya/Projektarbete/Projekt.cpp: In function `int DirectDrawSetup()'': E:/Coding/Tanya/Projektarbete/Projekt.cpp:1249: warning: converting NULL to non-pointer type E:/Coding/Tanya/Projektarbete/Projekt.cpp: In function `int CreateBob(BitmapObjectType *, int, int, int, int, char *)'': E:/Coding/Tanya/Projektarbete/Projekt.cpp:1641: warning: NULL used in arithmetic make.exe: *** [E:/Coding/Tanya/Projektarbete/Projekt.o] Error 1 Körning avslutad

VC6 has its own view of what C++ should be, which differs from that of g++ (which is arguably closer to the ISO C++ standard). It is thus no surprise that nonstandard code accepted by VC6 would be rejected by other compilers.

If you read the error message, you'll see that they very subtly suggest you add -fvtable-thunks to your compilation command-line options. COM is an unholy hack that relies on the internal layout of C++ objects and the presence and location of a virtual function table - all things which are not standardized in C++. g++ has support for it, but you have to explicitely enable it.

The other error at the bottom is due to the fact that, in standard C++, when you write for(int i; i<10; ++i) { ... }, the variable i exists only for the duration of the loop .

Be glad you have pretty explicit error messages.
Try to learn the words you don't understand

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[edited by - Fruny on February 18, 2003 12:03:09 PM]

Add "-fvtable-thunks" to Dev-C++''s compiler options whenever you are compiling COM stuff. Also make sure you have DirectX libs specific for MinGW.

quote: Original post by Fruny

The other error at the bottom is due to the fact that, in standard C++, when you write for(int i; i<10; ++i) { ... }, the variable i exists only for the duration of the loop .

Can you enable the looping variable to be destroyed after the loop exits in vc++? The fact that it doesn't annoys the hell out of me.


Runtime errors should be renamed to runtime terrors

[edited by - Eskhan on February 18, 2003 12:17:46 PM]

VC6, no. VC7, yes. It''s in the project options, under the ''language'' item if I am not mistaken.


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Dammit

well, I guess i''ll have to stick to enclosing the for loops with compund statements then...



Runtime errors should be renamed to runtime terrors

Go to ''project options''->''compiler''->''compiler options''->''c++ compiler'' and write ''-fvtable-thunks'' in there.

You need to convert your directX libs to mingw32 libs. Here is an article describing how to do it. It talks about recompiling the tools, but I think they have binaries up for download already.

Thank you very much for your help guys! It''s people like you that makes life worth living.