GCC compiler -m64 option in cygwin
Reini Urban
rurban@x-ray.at
Thu Feb 5 14:14:00 GMT 2009
2009/2/5 rajeevs:
> please go through the followings for the problem:
>
> 1) I want to create a 64 bit DLL using Cygwin in Windows Serever 2003
> 64 bit platform.
> 2) I am using Cygwin to run the make file
> 3) In the make file I have a macro "CFLAGS" where gave the option
> "-m64" in the make file for 64 bit build
> 4) But when I use this option I am getting an error like:
>
> $ make -f makefile_64
> g++ -c -DWIN64 -D"__int64=long long" -trigraphs -I../include
> -IC:/Progra~1/Java/jdk1.5.0_10/include
> -IC:/Progra~1/Java/jdk1.5.0_10/include/win32 -mno-cygwin -m64 Abc.C -o Abc.o
> Abc.C:1: sorry, unimplemented: 64-bit mode not compiled in
> make: *** [Abc.o] Error 1
What exactly do you not understand in the error message
"sorry, unimplemented: 64-bit mode not compiled in"
Did you read the README which comes with the gcc package?
You are using: -mno-cygwin -m64
Why do you ask mingw questions here at cygwin?
Please hurry over to mingw-users.
> 5) The main thing is that I don't know exactly what should be the
> option we have to give under cygwin for building a 64 bit DLL (though I have
> used "-m64" option), but in Linux if you use this option, you'll get the 64
> bit .SO file!!!
This is a different architecture with 64bit support.
> i tried alot but tillnow didn't get the solution.
> Please suggest me some alternative options if anybody have.
Google would have been your friend. That is a fantastic and completely
new way to find information by yourself, without the need to wait for
answers from mailing lists.
There's a unsupported and problematic/incompatible mingw build:
http://www.tdragon.net/recentgcc/ for 4.3
and
http://mingw-w64.sourceforge.net/ for win64
--
Reini
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