Problem 1291 - GEANT4_USE_SYSTEM_EXPAT is not documented
Summary: GEANT4_USE_SYSTEM_EXPAT is not documented
Status: CLOSED FIXED
Alias: None
Product: Documentation
Classification: Unclassified
Component: Installation Guide (show other problems)
Version: 9.5
Hardware: All All
: P5 normal
Assignee: Ben Morgan
URL:
Depends on:
Blocks:
 
Reported: 2012-02-24 18:49 CET by Tom Roberts
Modified: 2012-09-25 14:56 CEST (History)
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Description Tom Roberts 2012-02-24 18:49:32 CET 
The cmake variable GEANT4_USE_SYSTEM_EXPAT is not documented. It must be set to ON in order to build with the Coin3D visualization (and coin's similar --enable-system-expat must be given to its configure script). Both Geant4 and Coin3D use the expat library, both contain a local version, and those local versions are incompatible, so it is necessary to supply a system expat library.

Please describe all cmake variables in the installation guide, no matter how esoteric. Until I found this I was greatly perplexed.

Also, please document the ability to add flags to the C++ compiler:
    CXXFLAGS="-DCOIN_NOT_DLL -DSOWIN_NOT_DLL" cmake ....

(Those specific flags are necessary to build the OpenInventor driver using Coin3D and static libraries; omit the "_NOT" for shared libraries.)
Comment 1 Tom Roberts 2012-04-19 21:18:05 CEST 
ON =>NO
Comment 2 Tom Roberts 2012-04-19 21:19:27 CEST 
My mistake. It should be ON.
Comment 3 Ben Morgan 2012-09-25 14:56:35 CEST 
Expat option(s) documented, added section on use of various C/CXX/CFLAGS/CXXFLAGS variables and associated CMake command line options, added section on use of initial cache file to encode build settings.

Committed in revision:4002 of documentation repository, will be in 9.6 Release.