Error while loading shared libraries: libdb_cxx-4.8.so: cannot open shared object file #4103

[centos 6.5, current bitcoin version] I seem to have successfully compiled bitcoind, however, when I try to run it, I get the following:

./bitcoind: error while loading shared libraries: libdb_cxx-4.8.so: cannot open shared object file: No such file or directory

Having followed the directions here, I downloaded and compiled 4.8 source, but I can't seem to get any BerkeleyDB.4.8 folders to be generated in /usr/local. I have, however, located libdb_cxx-4.8.so in db-4.8.30.NC/build_unix/.libs

If I simply copy or reference this .so file in the correct places, should that resolve the issue? Using 'locate libdb_cxx' I get entries for 'libdb_cxx.so' and 'libdb_cxx-4.7.so' in /usr/lib64, but that's all.

Should I point bitcoin/src/m4/bitcoin_find_bdb48.m4, line:7, to 'bdbdirlist=/root/berkeley-db/db-4.8.30.NC/build_unix/.libs' ? (the db-4.8.30.NC/build_unix/build/include directory mentioned above does not exist for me).

Copying libdb_cxx-4.8.so do /usr/lib64 does not seem to resolve the issue.

My apologies in advance for my limited understanding. I'm still getting up to speed with several layers of abstraction involved here. Thanks in advance. Full post here: https://bitcointalk.org/index.php?topic=588032

see also #3550

The runtime library cannot find the .so file. There are [at least] two ways to specify the dynamic linker search path. The environment variable LD_LIBRARY_PATH (only in that session) as well as (globally) adding the path to `/etc/ld.so.conf'.

export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:/usr/local/lib"

In general: If you build BerkeleyDB from scratch, build only the static library (--with-static) not the shared one (--without-shared). It will not need the static library at runtime, which makes the executable more self-contained (this is the same as done for the gitian builds).

Closing this as it's more of a question than an actual issue.

On ubuntu, installing libdb5.3++ worked for me.

This worked for me too. Thanks @juanpastas

sudo add-apt-repository ppa:bitcoin/bitcoin sudo apt-get update sudo apt-get install libdb4.8-dev libdb4.8++-dev

i have tried installation libdb4.8 but it throws following msg , any help then please write here

Package libdb4.8-dev is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source

E: Package 'libdb4.8-dev' has no installation candidate E: Package 'libdb4.8++-dev' has no installation candidate

@scottie I had to do this first:

sudo apt-get install software-properties-common

for add-apt-repository to work.

/e Oh noes, this issue is closed. Didn't see that. :(

On Debian, after running make install you get this message.

# Libraries have been installed in:
#    /usr/local/lib
#
# If you ever happen to want to link against installed libraries
# in a given directory, LIBDIR, you must either use libtool, and
# specify the full pathname of the library, or use the '-LLIBDIR'
# flag during linking and do at least one of the following:
#    - add LIBDIR to the 'LD_LIBRARY_PATH' environment variable
#      during execution
#    - add LIBDIR to the 'LD_RUN_PATH' environment variable
#      during linking
#    - use the '-Wl,-rpath -Wl,LIBDIR' linker flag
#    - have your system administrator add LIBDIR to '/etc/ld.so.conf'
# 
# See any operating system documentation about shared libraries for
# more information, such as the ld(1) and ld.so(8) manual pages.

# Solving using forth option
su -
echo "/usr/local/lib" >> /etc/ld.so.conf.d/bitcoind.conf
ldconfig

FWIW: The only recommended way to install bdb 4 (besides a depends build) is to use the ./contrib/install_db4.sh script, as described in doc/build-unix.md and other build-*: this builds a static library that is only used by bitcoind, so there's no need to make global system changes