Subj : Unresolved external __declspec(dllimport), and illegal instruction
To   : borland.public.cpp.borlandcpp
From : MikL
Date : Wed Nov 17 2004 10:35 pm

Hi all,

I've never used C/C++ to write a Windows app (only console apps), and I'm
hitting an error that suggests I'm ignorantly misusing the Bcc32 compiler
("Borland C++ 5.5 for Win32" with "Turbo Incremental Link 5.00") under
WinXP.

In case it's relevant, I'm attempting to compile the Sun Java launcher
(java.c + java_md.c).  I've been getting many "unresolved references" where
java_md.c calls functions in java.c, despite the presence of good-looking
function prototypes.  To try to track down the problem, I merged the source
code from both files into a single source file and compiled that.  All of
the unresolved reference errors went away, with the exception of one
referring to "___initenv", which appears as follows in the source:

__declspec(dllimport) char **__initenv;

int WINAPI WinMain(HINSTANCE inst, HINSTANCE previnst, LPSTR cmdline, int
cmdshow)
{
    int   ret;
    SetThreadLocale(GetSystemDefaultLCID());
    __initenv = _environ;
    ret = main(__argc, __argv);
    return ret;
}

What do I need to do?  I've been Googling, and seen a few references to
IMPLIB and COFF2OMF, but I've done my head in trying to understand what
they're used for and how to use them...and I don't know if they're related
to my problem anyway :(  I've never even built a DLL.

The compile command I'm using is as follows.  I've broken it into multiple
lines here for readability:

bcc32 -5 -tW -DJAVAW -DWIN32
"-IC:\Program Files\Borland\bcc55\Include"
"-IC:\Program Files\Java\j2sdk1.4.2_03\include"
"-IC:\Program Files\Java\j2sdk1.4.2_03\include\win32"
"-LC:\Program Files\Borland\bcc55\Lib"
-DJDK_MAJOR_VERSION=\"1\"
-DJDK_MINOR_VERSION=\"4\"
"-DJAVA_ARGS={ \"heysen.common.ui.UiDialog_Test\" }"
"-DAPP_CLASSPATH={ \"testapp.jar\" }"
-otestapp.exe
java_all.c

Sadly, if I remove the references to __initenv, I get an executable, but
when I try to run it I get the following error (in a GUI dialog):

[TITLE: 16 bit MS-DOS Subsystem]
testapp.exe
The NTVDM CPU has encountered an illegal instruction.
CS:0e25 IP:010c OP:2e 63 00 88 13 Choose 'Close' to terminate the
application.

Thank you for your patience in reading this far!

.