Problem with libPostscriptdll when building in Windows

I need to build root on windows to include some math functionality not available in the standard windows binaries and the home-built version seems to have a problem with the libPostscript.dll not present in the standard binaries. This is a problem building on both Windows 7 and Windows 10.

I have built root as follows:

Start with downloaded sources from

Use Visual studio express 2013 (compiler ID’s as C/C++ “Optimizing Compiler Version 18.00.31101 for x86”. (The visual studio version number convention is very confusing)

Fetch and install third party packages:
- Zlib
- GSL 1.16

Use cmake to configure with the command line:

cmake -G “Visual Studio 12” -Dbuiltin_zlib=ON -DZLIB_INCLUDE_DIR=“C:\Program Files (x86)\GnuWin32\include” -DZLIB_LIBRARY_DEBUG=“C:\Program Files (x86)\GnuWin32\lib\zlib.lib” -DZLIB_LIBRARY_RELEASE=“C:\Program Files (x86)\GnuWin32\lib\zlib.lib” -Dbuiltin_gsl=OFF -DGSL_CBLAS_LIBRARY=“C:\Program Files\gsl\x86\lib\cblas.lib” -DGSL_INCLUDE_DIR=“C:\Program Files\gsl\x86\include” -DGSL_LIBRARY=“C:\Program Files\gsl\x86\lib\gsl.lib” -Dfftw3=ON -Dbuiltinfftw3=OFF -DFFTW_DIR=“C:\Program Files (x86)\fftw” -DFFTW_INCLUDE_DIR=“C:\Program Files (x86)\fftw” -DFFTW_LIBRARY=“C:\Program Files (x86)\fftw\libfftw3-3.lib” -Dminuit2=ON -Dpython=ON -Droofit=ON …/root-src

No errors

cmake --build .

No errors

Then try run root, create a TCanvas
root [0] new TCanvas
(class TCanvas*)0x3495a78

Canvas creates OK
Now use the drawing toolbar to make a picture, and try to save to a pdf

root [1] C:\Users\hseywerd\root-build\bin\libPostscript.dll: The specified module could not be found.
Load Error: Failed to load Dynamic link library C:\Users\hseywerd\root-build\bin\libPostscript.dll
Error in TCint::AutoLoad: failure loading library libPostscript.dll for class TPDF
Error in TPluginHandler::SetupCallEnv: class TPDF not found in plugin Postscript

Then root terminates unpleasantly

Works fine for gif, bmp etc., but fails for all the types in the TPostscipt library (ps, pdf, eps, etc…)

I look back in the build files but see no errors, and the libPostscript dll exists.

There is a workaround: If I copy the libPostscript dll from the prebuilt windows version, no error.
Nonetheless, it would be nice to know what’s going on.



Why are you specifying -Dbuiltin_zlib=ON and then -DZLIB_INCLUDE_DIR="C:\Program Files (x86)\GnuWin32\include" -DZLIB_LIBRARY_DEBUG="C:\Program Files (x86)\GnuWin32\lib\zlib.lib" -DZLIB_LIBRARY_RELEASE="C:\Program Files (x86)\GnuWin32\lib\zlib.lib"
Please try with “-Dbuiltin_zlib=ON” only.

Cheers, Bertrand.