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problem with compiling 64 bt dll on a 32 bit windows via TDM-GCC

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-1

I use 32 bit windows and my assistant has 64 bit. We both use gcc (I specifically use tdm-gcc. My assistant uses qt which also uses gcc as far as I'm aware). I wanted to write a very simple plugin in a form of simple .dll for my assistant to use from inside of her application. To do so I need just to compile my .dll for windows 32 (like 32 bit XP) as a .dll for a windows 64 (like win 7 or 10).

I found that -m64 option could work. However when I compile it and she links it and tries to call my functions it shows that this application with this plugin .dll I've made (on 32 bit windows with tdm-gcc with that -m64 option) silently crashes (program ends and no output is generated).

What is the problem with that? The test we were doing was simple like exporting a function that just returns 232323 and trying to receive and print it on application side - but is still doesn't work.My guess is that this 64 bit .dll is wrong (dependency walker shows dependency on kernel32, isn't it 32 bit specific?)

Should I do something more than putting -m64 to make my plugin compile to 64 bit and work properly there?

windows gcc dll 32bit-64bit tdm-mingw

share|improve this question

edited Mar 9 at 4:16

Spevacus

536

asked Mar 9 at 0:37

J. StoneJ. Stone

217

add a comment | 

-1

I use 32 bit windows and my assistant has 64 bit. We both use gcc (I specifically use tdm-gcc. My assistant uses qt which also uses gcc as far as I'm aware). I wanted to write a very simple plugin in a form of simple .dll for my assistant to use from inside of her application. To do so I need just to compile my .dll for windows 32 (like 32 bit XP) as a .dll for a windows 64 (like win 7 or 10).

I found that -m64 option could work. However when I compile it and she links it and tries to call my functions it shows that this application with this plugin .dll I've made (on 32 bit windows with tdm-gcc with that -m64 option) silently crashes (program ends and no output is generated).

What is the problem with that? The test we were doing was simple like exporting a function that just returns 232323 and trying to receive and print it on application side - but is still doesn't work.My guess is that this 64 bit .dll is wrong (dependency walker shows dependency on kernel32, isn't it 32 bit specific?)

Should I do something more than putting -m64 to make my plugin compile to 64 bit and work properly there?

windows gcc dll 32bit-64bit tdm-mingw

share|improve this question

edited Mar 9 at 4:16

Spevacus

536

asked Mar 9 at 0:37

J. StoneJ. Stone

217

add a comment | 

I use 32 bit windows and my assistant has 64 bit. We both use gcc (I specifically use tdm-gcc. My assistant uses qt which also uses gcc as far as I'm aware). I wanted to write a very simple plugin in a form of simple .dll for my assistant to use from inside of her application. To do so I need just to compile my .dll for windows 32 (like 32 bit XP) as a .dll for a windows 64 (like win 7 or 10).

I found that -m64 option could work. However when I compile it and she links it and tries to call my functions it shows that this application with this plugin .dll I've made (on 32 bit windows with tdm-gcc with that -m64 option) silently crashes (program ends and no output is generated).

What is the problem with that? The test we were doing was simple like exporting a function that just returns 232323 and trying to receive and print it on application side - but is still doesn't work.My guess is that this 64 bit .dll is wrong (dependency walker shows dependency on kernel32, isn't it 32 bit specific?)

Should I do something more than putting -m64 to make my plugin compile to 64 bit and work properly there?

windows gcc dll 32bit-64bit tdm-mingw

share|improve this question

edited Mar 9 at 4:16

Spevacus

536

asked Mar 9 at 0:37

J. StoneJ. Stone

217

share|improve this question

edited Mar 9 at 4:16

Spevacus

536

asked Mar 9 at 0:37

J. StoneJ. Stone

217

share|improve this question

edited Mar 9 at 4:16

Spevacus

536

asked Mar 9 at 0:37

J. StoneJ. Stone

217

edited Mar 9 at 4:16

Spevacus

536

edited Mar 9 at 4:16

Spevacus

536

asked Mar 9 at 0:37

J. StoneJ. Stone

217

asked Mar 9 at 0:37

J. StoneJ. Stone

217

1 Answer
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0

It showed it most probably work.. She cant link it in QT from unknown reasons to me (we work remotely and i cannot check) but she succesfully linked it dynamically so it seems -m64 in fact suffice

share|improve this answer

answered Mar 26 at 20:32

J. StoneJ. Stone

217

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Did you produce separate import libraries for the two architectures? Just because the list of exported functions is the same doesn't make the import library interchangeable. Or are you not using import libraries at all and trusting the gcc linker to analyze the DLL exports?
  
  – Ben Voigt
  Mar 26 at 20:37
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Ben Voigt - i didnt generated import libs, gcc generally dont need that -llibname and he just links..... this is a problem of my girl assistant and QT i dont know what it was.... i only was in confusion if that -m64 should work at all , it now showed it work when dynamically linked.. so my doubts are answered
  
  – J. Stone
  Mar 28 at 13:49
  

  
  
  
  

add a comment | 

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0

It showed it most probably work.. She cant link it in QT from unknown reasons to me (we work remotely and i cannot check) but she succesfully linked it dynamically so it seems -m64 in fact suffice

share|improve this answer

answered Mar 26 at 20:32

J. StoneJ. Stone

217

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Did you produce separate import libraries for the two architectures? Just because the list of exported functions is the same doesn't make the import library interchangeable. Or are you not using import libraries at all and trusting the gcc linker to analyze the DLL exports?
  
  – Ben Voigt
  Mar 26 at 20:37
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Ben Voigt - i didnt generated import libs, gcc generally dont need that -llibname and he just links..... this is a problem of my girl assistant and QT i dont know what it was.... i only was in confusion if that -m64 should work at all , it now showed it work when dynamically linked.. so my doubts are answered
  
  – J. Stone
  Mar 28 at 13:49
  

  
  
  
  

add a comment | 

0

It showed it most probably work.. She cant link it in QT from unknown reasons to me (we work remotely and i cannot check) but she succesfully linked it dynamically so it seems -m64 in fact suffice

share|improve this answer

answered Mar 26 at 20:32

J. StoneJ. Stone

217

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Did you produce separate import libraries for the two architectures? Just because the list of exported functions is the same doesn't make the import library interchangeable. Or are you not using import libraries at all and trusting the gcc linker to analyze the DLL exports?
  
  – Ben Voigt
  Mar 26 at 20:37
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Ben Voigt - i didnt generated import libs, gcc generally dont need that -llibname and he just links..... this is a problem of my girl assistant and QT i dont know what it was.... i only was in confusion if that -m64 should work at all , it now showed it work when dynamically linked.. so my doubts are answered
  
  – J. Stone
  Mar 28 at 13:49
  

  
  
  
  

add a comment | 

It showed it most probably work.. She cant link it in QT from unknown reasons to me (we work remotely and i cannot check) but she succesfully linked it dynamically so it seems -m64 in fact suffice

share|improve this answer

answered Mar 26 at 20:32

J. StoneJ. Stone

217

share|improve this answer

answered Mar 26 at 20:32

J. StoneJ. Stone

217

answered Mar 26 at 20:32

J. StoneJ. Stone

217

answered Mar 26 at 20:32

J. StoneJ. Stone

217