From: khan@xraylith.wisc.edu (Mumit Khan) Subject: Re: Linking problems. 24 Jul 1998 09:30:38 -0700 Message-ID: References: <35B757CB.D54A10AD@Brown.Edu> Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII To: Aaron Schweiger Cc: gnu-win32@cygnus.com On Thu, 23 Jul 1998, Aaron Schweiger wrote: > I am trying to link the mgui graphics library under gnu-win32, however, > I keep getting linking errors: > > e:\MINGW32\LIB\GCC-LIB\i386-mingw32\egcs-2.90.27\../../..\libmguiw.a(mguiinit.o)(.text+0x2ad):mguiinit.c: > undefined reference to `MessageBoxA' > e:\MINGW32\LIB\GCC-LIB\i386-mingw32\egcs-2.90.27\../../..\libmguiw.a(mguiinit.o)(.text+0x904):mguiinit.c: > undefined reference to `GetModuleFileNameA' > > Quite clearly, the library I am linking is forgetting the @16 needed at > the end of the function name. Can I resolve this problem? > Hmmm ... looks like something is redefining STDCALL somewhere, and that's the root of your problem. In Windows32/ASCIIFunctions.h, MessageBoxA is declared as the following: int STDCALL MessageBoxA ( /* parameters here /* parameters here ); You must be including some header *before* windows.h that's redefining STDCALL to *nothing* and hence gcc doesn't know that it should append the @16 to the name of the function and also generate the right code for pascal-style calling convention required. Check for messages when compiling and see if there are any messages like: ......[file name]: ##: warning: STDCALL redefined. ......[ another ]: ##: warning: STDCALL first defined here. That should get you started. Also, make sure that you've not changed the GCC specs files. fyi, STDCALL is defined to __stdcall__((attribute)) in iff i386 is defined by pre-processor (which is should be in your case). Regards, Mumit - For help on using this list (especially unsubscribing), send a message to "gnu-win32-request@cygnus.com" with one line of text: "help".