On Wed, 2002-02-13 at 03:01, Ted Irons wrote:
> We are using cygwin (1.3.9) with fltk-1.1 on a
> Windows NT machine.
>
> Our C++ package uses autoconf, automake, and
> libtool to maintain the build system.
> CXXFLAGS contains -DWIN32.
> LDFLAGS contains -no-undefined and -mwindows.
> configure.ac contains the AC_LIBTOOL_WIN32_DLL.
> However, when I run configure I'm using the --disable-shared flag.
>
> The program has fltk, glut, and opengl calls.
> Fltk was built using its configure under cygwin
> (one of the flags that this sets is -DWIN32). The fltk
> test programs build and run fine.
>
> Since the program seg faults (in an fltk call)
> when invoked, I was wondering if there was
> some kind of disconnect between the fltk libraries
> and our libraries. Something that I may have
> missed? The program seems to link correctly
> (except for a missing _WinMainCRTStartup call,
> which it says it can't find and will default to
> some address that seems to correspond to _mainCRTStartup).
>
> This program works under Solaris, Linux, and IRIX.
>
> Thanks in advance,
> - Ted
IIRC, Windows needs a WinMain entry point for GUI apps, and
a standard main() entry point for console apps.
It looks like you're building this app as a GUI one, but only
have a main() entry point. Try adding '-mconsole' to LDFLAGS;
this should cause the app to be built as a console one.
Note that this has the unfortunate side-effect that your app
will open an empty console window if launched from Windows
Explorer instead of the command line.
An alternative would be to add a WinMain function; this has the
big drawback that WinMain gets the command line as one big string,
so you have to chop it up into pieces yourself.
int
#if !defined(WIN32)
main(int argc, char** argv)
#else
main_entry_point(int argc, char** argv)
#endif
{
...
}
#if defined(WIN32)
INT WINAPI
WinMain(check_your_win_api_ref_for_correct_signature)
{
int myargc = 0;
char** myargv = NULL;
/* Get the executable name (for argv[0]) using the Win32 API */
...
/* Chop up the command line into pieces, adding them to myargv */
...
/* Chain to the regular entry point */
return main_entry_point(myargc, myargv);
}
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