The problem occurs in new 9.5 beta version. source/interfaces/common/GNUmakefile no more contains line include $(G4INSTALL)/config/G4VIS_BUILD.gmk now for specific config i get libG4interfaces.so unusable by libG4OpenInventor.so. This triggers when G4UI_BUILD_XM_SESSION and G4UI_BUILD_XAW_SESSION are not set but G4VIS_BUILD_OIX_DRIVER is set. All these settings define G4INTY_BUILD_XT = 1. Now that line "include $(G4INSTALL)/config/G4VIS_BUILD.gmk" is missing, value of G4INTY_BUILD_XT is 0 but it must be 1 when built with OIX driver! Build of Geant4 completes fine but when i compile an app that uses libG4OpenInvetor.so i get linkage error complaining about undefined reference to G4Xt::getInstance(), which is not surpising because source/interfaces/common/src/G4Xt.cc was compiled with G4INTY_BUILD_XT = 0 and therefore contains no symbols. Quick fix: add line "include $(G4INSTALL)/config/G4VIS_BUILD.gmk" to source/interfaces/common/GNUmakefile (but i do not know if it can lead to other errors) or (what i did when compiled) comment line #if defined(G4INTY_BUILD_XT) || defined(G4INTY_USE_XT) and corresponding #endif in files source/interfaces/common/src/G4Xt.cc and source/interfaces/common/include/G4Xt.hh
This is understood. A fix will be included in release 9.5. Both OIX and Xm in visualisation need Xt in interfaces. Often, this is not a problem since the user builds Xt anyway. But if not, it must be forced. The following lines in G4UI_BUILD.gmk do it: # Special case: if OPENGLXM vis driver requested, G4Xt must be built. ifdef G4VIS_BUILD_OPENGLXM_DRIVER G4INTY_BUILD_XT = 1 endif # Special case: if OIX vis driver requested, G4Xt must be built. ifdef G4VIS_BUILD_OIX_DRIVER G4INTY_BUILD_XT = 1 endif This introduces a sort of dependence between vis and interfaces, but it cannot be helped.
