SuiteSparse Installation: Cannot open include file: 'regex.h'

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I am having issues installing SuiteSparse in Matlab. I am using the 5.3 version, downloaded from, and using the Visual Studio 2017 C++ compiler. When I run SuiteSparse_install, I get the following error:
c:\users\dylan\documents\school\masters\suitesparse\metis-5.1.0\gklib\GKlib.h(68): fatal error C1083: Cannot open include file: 'regex.h': No such file or directory
And UMFPACK, KLU, CHOLMOD, SuiteSparseQR fail to install. Has anyone got any experience with this, or could point me in the right direction for assistance? I need the sparse2 and spqr functions for my code, as I have a very large over-determined, sparse system to solve, and it is giving Matlab's mldivide a rough time. Thanks!
Humberto Brambila de Salles
Dylan, you are the real MVP! I've been trying this for so long! Thank you so much!!

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Answers (1)

Royi Avital
Royi Avital on 25 Apr 2019
Edited: Royi Avital on 16 May 2020
Why would you need SuiteSparse in MATLAB?
I though MATLAB uses SuiteSparse to begin with.
Royi Avital
Royi Avital on 31 May 2020
Dylan, MATLAB uses SuiteSparse for QR of Sprase Matrices to begin with (It's built in). It also uses MKL for BLAS things. Could you show a sample code you get improvement from?

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