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| -rw-r--r-- | README.rst | 15 |
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diff --git a/README.rst b/README.rst index 2ffc4a92b8..9d7ad10f18 100644 --- a/README.rst +++ b/README.rst @@ -60,3 +60,18 @@ Alternatively, install Qt Creator and open the `bitcoin-qt.pro` file. An executable named `bitcoin-qt` will be built. +Berkely DB version warning +========================== + +A warning for people using the *static binary* version of Bitcoin (tl;dr: **Berkely DB databases are not forward compatible**). + +The static binary version of Bitcoin is linked against libdb4.7 or libdb4.8 (see also `this Debian issue`_). + +Now the nasty thing is that databases from 5.X are not compatible with 4.X. + +If the globally installed development package of Berkely DB installed on your system is 5.X, any source you +build yourself will be linked against that. The first time you run with a 5.X version the database will be upgraded, +and 4.X cannot open the new format. This means that you cannot go back to the old statically linked version without +significant hassle! + +.. _`this Debian issue`: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=621425 |