[Lazarus] Compiling only LCL to 64-bit, on Windows

[Andreas Schneider]

At Wednesday, 24.08.2011 on 15:06 Marcos Douglas wrote:
> 
> So, what is the best way to use Win 32 and 64-bit, in my case?
> 

I would suggest: don't go the most complicated route ever ;-)
It's really dead simple to get cross compilation with Windows as target to run. In your case I would suggest the lowest common denominator: the 32bit compiler. So build from/for 32bit and add the 64bit cross compiler there:

I assume the official FPC 2.4.4 release for 32bit to be installed under C:\FPC\2.4.4.

set PATH=C:\FPC\2.4.4\bin\i386-win32;%PATH%
cd C:\FPC\2.5.1
svn co http://svn.freepascal.org/svn/fpc/trunk src
cd src
make install INSTALL_PREFIX=C:\FPC\2.5.1
make crossinstall INSTALL_PREFIX=C:\FPC\2.5.1 OS_TARGET=win64 CPU_TARGET=x86_64
make clean


Done. Now you set the compiler (in Lazarus) to C:\FPC\2.5.1\bin\i386-win32\fpc.exe and switch the target architecture/OS in the project options depending on your needs - the 32bit fpc.exe will then either invoke the 32bit ppcx86.exe to compile for 32bit, or the 32bit ppccrossx86_86.exe to compile for 64bit.

-- 
Best Regards,
Andreas