Re: [Mingw-users] -L option to include libddraw.a on mac

[John B. <joh...@ho...>]

Zack Morris wrote:

> Ya true hmm, I just haven't worked much with configure or passing gcc
> options directly. Well I have it all working from console, and am now
> trying to integrate this with Xcode. I have done these steps so far to
> swap mingw in for gcc, and tell Xcode what flags to pass to it:
>
> cd /usr/bin
> sudo mv gcc gccBACKUP
> sudo ln -s /usr/local/cross-tools/bin/i386-mingw32-g++ gcc
> // go into project settings:
> Architectures: i386 (might be $(NATIVE_ARCH) on intel)
> Valid Architectures: i386 x86_64
> Header Search Paths: /Users/zmorris/Development/Windows/DXSDK/include
> Library Search Paths: /usr/local/cross-tools/lib
> Other Linker Flags: -mwindows -g -o -lmingw32 -lddraw
>
> So far it allllmost works, but I am getting:
>
> ld: warning in /usr/local/cross-tools/lib/libddraw.a, file is not of required architecture
> "_main", referenced from:
> start in crt1.10.5.o

I don't know anything abiyt Xcode, but:
You should create symbolic links g++ and gcc, corresponding to i386-mingw32-g++
and  i386-mingw32-gcc respectively. If you are compiling
C++ files, you should use g++, otherwise use gcc. gcc will work, but you must
add -lstdc++ to the command line. However, that is not the problem (yet).

It seems that your native ld is being called instead of the
cross-compiler's ld.  You should probably create your symbolic links in
/usr/local/cross-tools/bin and then ensure that this directory appears before
/usr/bin (or any other directory that contains gcc) in your PATH.

> "_MessageBox", referenced from:
> _WinMain in main.o
> ld: symbol(s) not found
> collect2: ld returned 1 exit status

MessageBox is found in -luser32, which is part of w32api. I assume that w32api
is installed. You can search the MSDN Library to find out which header and
library files are needed for any Win32 API function.
>
> I am still not absolutely certain that Xcode is using mingw. The -mwindows flag
>  should skip the need for main(), and I believe -lmingw32 should provide
> MessageBox(). I am still missing something, but this whole process seems to
> still be evolving, with several forums on the web offering different suggestions.
>

The -o flag does not belong in 'Other Linker Flags'. I don't think that it is
necessary to explicitly link to -lmingw32, and it may even be the problem.

> FYI, I understand this is a potentially painful path I am on, but I want to
> understand what is happening at a low level. I also have MS Visual C++
> Express in parallels and am building a project in parallel on both sides.
> It's just quicker for me to work in my native environment is all, and then
> debug in the visual c++ IDE when I need to.
>
> Thanx,
>
> --Zack
>

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