The following is from README.txt
files on the SourceForge download pages (http://sourceforge.net/projects/lazarus/files/Lazarus%20Windows%2032%20bits/Lazarus%201.2/ and http://sourceforge.net/projects/lazarus/files/Lazarus%20Windows%2064%20bits/Lazarus%201.2/). However, those readme.txt files are apparently not included in the actual installation.
I have verified that installing the plug-in allows you to build a 64-bit application.
Two things:
- there is an add-on for building Win64 applications in the 32-bit Lazarus IDE:
Add-On for building 64bit Windows applications:
lazarus-1.2.0-fpc-2.6.2-cross-x86_64-win64-win32.exe
This file can be installed as add-on to the 32 bit Lazarus IDE (on Systems with Windows 32 or 64 bit), if you wish to develop for 64bit Windows too. If you install this on a 64bit Windows PC together with the 32 bit Lazarus IDE, you will also able to debug 64 bit applications.
the link to the 64-bit Lazarus IDE on the Lazarus homepage is incorrect (it points to the Win32 version). The link should be:
If you use the 64-bit IDE you'll need a similar (but different) plugin to build 32-bit binaries.