Qt building 64 bits

Question

I have downloaded the source package of Qt, and am trying to build a 64 bit version, on a 64 bit, Windows 7 machine. I have read as much as I can on building Qt, but I must be missing something somewhere.

I open a 64 bit command shell, which some descriptions seem to think is the only thing necessary.

Next I call configure. However, should I be specifying a platform option? If so which one? There doesn't seem to be a win64 option, or anything similar.

Then I call nmake, which builds a bunch of stuff, but it still builds in 32 bits.

What am I missing? Any help would be amazing.

Answer 1

Here's the configure command I run to build Qt 4.7.1 on 64-bit Windows. The compiled libraries are, indeed, 64-bit. This is run from the 64-bit command line. I'm using the Windows Platform SDK, not Visual Studio, but as long as you are running vcvars64.bat (or something like that), your environment should be set.

configure -plugin-sql-sqlite -no-qt3support -no-webkit -developer-build -opensource -platform win32-msvc2008
nmake

Answer 2

That seems the correct way to do it. Have you build a 32 bits Qt on the same source tree before? You might try to restart with a fresh Qt source directory.