# Using the Herwig bootstrap script¶

## Out of the box¶

chmod +x herwig-bootstrap
./herwig-bootstrap /where/to/install/herwig


In the following we will call the location of the installation ${HERWIGPATH}. For a quicker installation you can supplement the -j option, for example ./herwig-bootstrap -j 4${HERWIGPATH}


After the bootstrap script completes, you can



and re-run

./herwig-bootstrap -j 4 ${HERWIGPATH}  ## Use your own pre-installed packages¶ Herwig builds on a number of freely available libraries and programs from 3rd parties. If you want to install some of these packages on your own or you might not need them for your Herwig build you can switch them off during installation. To switch off a package use the --without-<PACKAGE>  switch. If you have any package already installed you can tell the bootstrap script its location by adding --<PACKAGE>-location=/where/the/package/is  to the former switch. Your installation now may look like the following ./herwig-bootstrap -j 4 --without-boost --boost-location=where/boost/is --without-vbfnlo${HERWIGPATH}


If you chose to link against any pre-installed packages make sure that you have read Prerequisites of the Herwig program.