# Thread: Not able to build QWT 6.1.4 on Windows

1. Beginner
Join Date
Oct 2019
Posts
2
Qt products
Platforms

## Not able to build QWT 6.1.4 on Windows

Hi.

I am trying to build QWT-6.1.4 on 64bit Windows 10, using Visual Studio 2017, based on default installation of Qt-5.13.1.

I have a build.bat script that sets up my environment, and starts the build:

CALL "C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\VC\Auxiliary\Build\vcvars all.bat" amd64_x86
set QT_PATH=E:\Qt\5.13.1\msvc2017_64
set path=E:\Qt\5.13.1\msvc2017_64
CALL qmake qwt.pro
CALL nmake

The build fails with the following output:

...
qwt_plot_glcanvas.cpp
E:\Qt\5.13.1\msvc2017_64\include\QtCore/qconfig.h(37): warning C4005: 'QT_LARGEFILE_SUPPORT': macro redefinition
.\qwt_plot_glcanvas.cpp: note: see previous definition of 'QT_LARGEFILE_SUPPORT'
E:\Qt\5.13.1\msvc2017_64\include\QtGui/qopenglext.h(115): error C2065: 'GLenum': undeclared identifier
E:\Qt\5.13.1\msvc2017_64\include\QtGui/qopenglext.h(115): error C2146: syntax error: missing ')' before identifier 'mode'

It seems to me that the opengl include files are not included (e.g. gl.h), but I am not able to figure out how to fix this. Has anyone experienced something similar, or know how to sort this out?

Best regards
Dag Magne

2. Beginner
Join Date
Oct 2019
Posts
2
Qt products
Platforms

## Re: Not able to build QWT 6.1.4 on Windows

It seems that my build was functional after all, but I had forgot to clean up the result from previous build trials.

Sorry!