Install error that can occur when installing Qwt under Windows 7.
After doing the following, the error pops up:
cd D:\Projects\Libraries\qwt-6.1.0 C:\Qt\5.1.1\mingw48_32\bin\qmake qwt.pro C:\Qt\Tools\mingw48_32\bin\mingw32-make.exe
The error message:
mingw32-make -f Makefile.Release mingw32-make[1]: Entering directory 'D:/Projects/Libraries/qwt-6.1.0' g++ -c -pipe -fno-keep-inline-dllexport -O2 -Wall -Wextra -frtti -fexceptions -m threads -DUNICODE -DQT_DLL -DQWT_DLL -DQWT_MAKEDLL -DQT_NO_DEBUG -DQT_GUI_LIB -D QT_CORE_LIB -I. -I"include" -I"C:\Qt\5.1.1\mingw48_32\include" -I"C:\Qt\5.1.1\mi ngw48_32\include\QtGui" -I"C:\Qt\5.1.1\mingw48_32\include\QtCore" -I"src\moc" -I "C:\Qt\5.1.1\mingw48_32\mkspecs\win32-g++" -o src\obj\qwt_autoscl.o src\qwt_auto scl.cpp In file included from include/qwt_scldiv.h:14:0, from include/qwt_autoscl.h:14, from src\qwt_autoscl.cpp:11: include/qwt_array.h:25:23: fatal error: qmemarray.h: No such file or directory #include <qmemarray.h> ^ compilation terminated. Makefile.Release:1859: recipe for target 'src/obj/qwt_autoscl.o' failed mingw32-make[1]: *** [src/obj/qwt_autoscl.o] Error 1 mingw32-make[1]: Leaving directory 'D:/Projects/Libraries/qwt-6.1.0' makefile:34: recipe for target 'release' failed mingw32-make: *** [release] Error 2
Download the most recent Qwt code.
Note that the build did not succeed in creating all examples, but this library itself was fine.