libevent is an asynchronous event notification software library. The libevent API provides a mechanism to execute a callback function when a specific event occurs on a file descriptor or after a timeout has been reached. Furthermore, libevent also supports callbacks due to signals or regular timeouts.
![[Note]](../images/note.png)
Development versions of BLFS may not build or run some packages properly if LFS or dependencies have been updated since the most recent stable versions of the books.
Download (HTTP): https://github.com/libevent/libevent/releases/download/release-2.1.12-stable/libevent-2.1.12-stable.tar.gz
Download MD5 sum: b5333f021f880fe76490d8a799cd79f4
Download size: 1.0 MB
Estimated disk space required: 20 MB (add 4 MB for tests and 4 MB for API docs)
Estimated build time: 0.3 SBU (add 11 SBU for tests)
Doxygen-1.9.8 (for API documentation)
First, fix an issue that prevents event_rpcgen.py from working:
sed -i 's/python/&3/' event_rpcgen.py
Install libevent by running the following commands:
./configure --prefix=/usr --disable-static && make
If you have Doxygen-1.9.8 installed and wish to build API documentation, issue :
doxygen Doxyfile
To test the results, issue: make verify. Six tests in
every suite related to regress_ssl.c and
regress_http.c are known to fail due to
incompatibilities with OpenSSL-3. Some tests that are related to
regress_dns.c are also known to fail intermittently
due to insufficient test timeouts.
Now, as the root user:
make install
If you built the API documentation, install it by issuing the following
commands as the root user:
install -v -m755 -d /usr/share/doc/libevent-2.1.12/api &&
cp -v -R doxygen/html/* \
/usr/share/doc/libevent-2.1.12/api
--disable-static: This switch prevents
installation of static versions of the libraries.