Linking with C library
Full working code for concepts described in this section is here.
Begin by adding fdb crate as a
dependency in your Cargo.toml file.
[dependencies]
fdb = "0.x"
fdb crate supports
linking
with different versions of the C library using cargo feature
flags. In order to
correctly build your application, you are required to specify the
version of the C library to link against. This can be done in two
ways. Either by using the command line option --features fdb/fdb-X_Y or
by specifying the following in your Cargo.toml. Here X is the
major version and Y is the minor version of FoundationDB.
[features]
default = ["fdb/fdb-X_Y"]
If you have installed libfdb_c.so in a non-standard location, you
can use the environment variable
RUSTC_LINK_SEARCH_FDB_CLIENT_LIB
to specify the location of the C library.
Note While it is required for your application to link to a
specific version of fdb_c library during build time, FoundationDB
client can also dynamically load newer version during runtime. This
feature is used during cluster upgrades. See this
link
for details.