hi yop
My QMAKESPEC env var is set = "win32-msvc" and i have compiled more then 100 examples 
Its just amazing that i am not able to compile qwtplot3d.pro ;(
I have tried:
qmake -makefile -spec win32-msvc [name].pro
and
qmake -makefile -spec win32-msvc.net [name].pro
and i get this:
This is not a valid makefile. To build this project using NMAKE,
use the Export Makefile command and run
NMAKE /f "qwtplot3d.mak".
You can specify a configuration when running NMAKE
by defining the macro CFG on the command line. For example:
NMAKE /f "qwtplot3d.mak" CFG="qwtplot3d - Win32 Debug"
Possible choices for configuration are:
"qwtplot3d - Win32 Release" (based on "Win32 (x86) Dynamic-Link Library")
"qwtplot3d - Win32 Debug" (based on "Win32 (x86) Dynamic-Link Library")
NMAKE : fatal error U1073: don't know how to make '""'
Stop.
This is not a valid makefile. To build this project using NMAKE,
use the Export Makefile command and run
NMAKE /f "qwtplot3d.mak".
You can specify a configuration when running NMAKE
by defining the macro CFG on the command line. For example:
NMAKE /f "qwtplot3d.mak" CFG="qwtplot3d - Win32 Debug"
Possible choices for configuration are:
"qwtplot3d - Win32 Release" (based on "Win32 (x86) Dynamic-Link Library")
"qwtplot3d - Win32 Debug" (based on "Win32 (x86) Dynamic-Link Library")
NMAKE : fatal error U1073: don't know how to make '""'
Stop.
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if i run:
qmake -o Makefile qwtplot3d.pro
nmake
i get this makefile:
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