[Development] Qt wiki MinGW for 64 bit

[Jonathan Liu]

On 14/09/2012 7:55 PM, niXman wrote:
> Today, reading this(qt-project.org/wiki/MinGW-64-bit) note, I paid
> attention to the fact that it refers to the need to edit qmake.conf
> Qt5 for building 64-bit.
> But yesterday, I have built Qt5 for 64-bit successfully without
> changing qmake.conf.
> Tell me please, why in the wiki is said that it is necessary to change
> qmake.conf?
The mkspec changes are needed if you have a GCC multilib compiler that 
can target both 32-bit and 64-bit. If the compiler is targeting 32-bit 
by default, it needs some additional flags to tell it to build for 64-bit.

Regards,
Jonathan