If you install a binary from our website, you may be downloading a version of VisIt that uses a different C++ compiler from what may be installed on your system. Our binary distributions will often run just fine on such systems but once you create your own plugin using a C++ compiler that differs from the compiler used to build VisIt, you may experience problems. If you are running into this problem, you will often see runtime error messages similar to:
*** glibc detected *** free(): invalid pointer: 0x095de9b8 ***
If you notice any runtime errors related to glibc because you're using a custom-built plugin with our binary distirbutions then you probably have a runtime library incompatibility. The best way to resolve this situation is to build VisIt on your platform using our build_visit script since it will automatically build VisIt. Once you've rebuilt VisIt using your C++ compiler, you should regenerate your plugin's Makefile using the your new VisIt's xml2makefile program. Once you have done that, rebuild your plugin to make it build against your new, natively built version of VisIt.