I just got a new quad core computer and noticed that nmake is only using 1 process.
I used to use make which had the switch -j4 for launching 4 processes. What is the nmake equivalent?
[edit] Based on the information below I have been able to add a command to my qmake project file:
QMAKE_CXXFLAGS += /MP
Which effectively did it for me. Many thanks.
Quick googling gives: http://msdn.microsoft.com/en-us/library/bb385193.aspx
According to MSDN, there's no such option for 'nmake'.
It is possible to get parallel compiles using the /MP option with the VC++ command line compiler:
> cl /MP a.cpp b.cpp c.cpp
However most makefiles don't put multiple source files into a single invocation of the compiler - it's far more common for the .cpp files to be compiled to .o files individually.
Incredibuild claims to be able to run nmake builds on multiple cores / multiple machines. I don't have any experience of it.
This doesn't work for normal makefiles, but there is a setting in Visual Studio 2005 that lets you build more than one .vcproj file at the same time (provided one isn't dependent on the other). Tools -> Options -> Projects and Solutions -> Build and Run -> X maximum number of parallel project builds.
QT have tool supposed for this http://qt.gitorious.org/qt-labs/jom
The CMake 2.8.1 RC1, as for the time of writing this it's ready to try, does bring new generator for NMake which is called NMake Makefiles JOM and it generates NMake with specific settings for jom, which is the drop in replacement of NMake. Thus, it gives multi-processing enabled building using NMake.