Software/Geant4/Installation/Xerces-C

Introduction

Xerces-C++ is a validating XML parser written in a portable subset of C++. Xerces-C++ makes it easy to give your application the ability to read and write XML data.

Geant4 requires the Xerces-C++ headers and libraries compiled against the C++11 standard in order to provide support for GDML geometry descriptions.

Details

Website

http://xerces.apache.org/xerces-c/

Source URL

http://www.apache.org/dist/xerces/c/3/sources/

Installed version

3.1.3 (17 Feb 2016)

Source code

src/geant4-prerequisites/xerces-c/xerces-c-3.1.3.tar.gz

Installation Notes

The Xerces-C++ website provides some useful instructions on Building and Installing Xerces-C++.

For installation, Xerces-C++ does not support installation into a sandbox directory (i.e. there are no options prefix or DESTDIR defined for command make install) and must be given the installation directory with the -prefix option. As such, to recompile Xerces-C++ for different target directories, the configure script must be rerun with a modified -prefix /path/to/dest option. This has to be managed manually as can be seen in the installation commands below.

Installation

When downloading software, the downloaded tarball (or other Zip archive) should be placed in an appropriately named directory in /unix/pbt/software/src: the instructions below assume that the directory is /unix/pbt/software/src/geant4-prerequisites/xerces-c.

The source code should then be extracted into a suitable subdirectory in /unix/pbt/software/build. The extracted source code directory can only be deleted once the software has been built and installed.

Source Code Extraction

cd /unix/pbt/software/src/geant4-prerequisites/xerces-c
tar -xvz -f xerces-c-3.1.3.tar.gz

Build And Install

It is possible to build for the Production environment without deleting the Xerces-C build directory created for the Development installation, meaning that significant time is saved when running make. However, it isn't recommended to do so as the Production installation ends up referencing components within /unix/pbt/software/dev which is not desirable as the two environments are no longer independent. As such, these instructions assume one is building from scratch for each environment: to do so, make sure that the build/qt directory is deleted before recreating it for the subsequent build and install.

Also, although it is possible to install straight to the Production environment, it is highly discouraged to do so without first compiling a Development version.

Development Environment

cd /unix/pbt/software/build
mkdir -pv xerces-c/xerces-c-3.1.3
cd xerces-c/xerces-c-3.1.3
../../../src/geant4-prerequisites/xerces-c/xerces-c/configure --prefix /unix/pbt/software/dev/xerces-c-3.1.3
make
make install

Production Environment

cd /unix/pbt/software/build
mkdir -pv xerces-c/xerces-c-3.1.3
cd xerces-c/xerces-c-3.1.3
../../../src/geant4-prerequisites/xerces-c/xerces-c/configure -prefix /unix/pbt/software/prod-sl6
make
make install