Cargo.toml

[package]
name = "lmdb-master-sys"
# NB: When modifying, also modify html_root_url in lib.rs
version = "0.2.6"
authors = [
    "Kerollmops <clement@meilisearch.com>",
    "Dan Burkert <dan@danburkert.com>",
    "Victor Porof <vporof@mozilla.com>",
]
license = "Apache-2.0"
description = "Rust bindings for liblmdb on the mdb.master branch."
documentation = "https://docs.rs/lmdb-master-sys"
repository = "https://github.com/meilisearch/heed/tree/main/lmdb-master-sys"
readme = "README.md"
keywords = ["LMDB", "database", "storage-engine", "bindings", "library"]
categories = ["database", "external-ffi-bindings"]
edition = "2021"

# Tell docs.rs which targets to build the documentation on. Since April
# 2026, docs.rs only builds on x86_64-unknown-linux-gnu by default; opt
# back into the platforms this crate supports.
# See <https://blog.rust-lang.org/2026/04/04/docsrs-only-default-targets/>.
[package.metadata.docs.rs]
targets = [
    "x86_64-unknown-linux-gnu",
    "aarch64-unknown-linux-gnu",
    "x86_64-apple-darwin",
    "aarch64-apple-darwin",
    "x86_64-pc-windows-msvc",
]

# NB: Use "--features bindgen" to generate bindings.
build = "build.rs"

[lib]
name = "lmdb_master_sys"
doctest = false

[dependencies]
libc = "0.2.175"

[build-dependencies]
bindgen = { version = "0.71.1", default-features = false, optional = true, features = [
    "runtime",
] }
cc = "1.2.37"
doxygen-rs = "0.4.2"

[dev-dependencies]
cstr = "0.2.12"

[features]
default = []
no_std = []
asan = []
fuzzer = []
fuzzer-no-link = []
posix-sem = []

# These features configure the MDB_IDL_LOGN macro, which determines
# the size of the free and dirty page lists (and thus the amount of memory
# allocated when opening an LMDB environment in read-write mode).
#
# Each feature defines MDB_IDL_LOGN as the value in the name of the feature.
# That means these features are mutually exclusive, and you must not specify
# more than one at the same time (or the crate will fail to compile).
#
# For more information on the motivation for these features (and their effect),
# see https://github.com/mozilla/lmdb/pull/2.
mdb_idl_logn_8 = []
mdb_idl_logn_9 = []
mdb_idl_logn_10 = []
mdb_idl_logn_11 = []
mdb_idl_logn_12 = []
mdb_idl_logn_13 = []
mdb_idl_logn_14 = []
mdb_idl_logn_15 = []
mdb_idl_logn_16 = []

# Enable the USE_VALGRIND feature.
#
# You have to install the RPM valgrind-devel which contains memcheck.h.
use-valgrind = []

# Setting this enables you to use keys longer than 511 bytes. The exact limit
# is computed by LMDB at compile time. You can find the exact value by calling
# Env::max_key_size(). This value varies by architecture.
#
# Example max key sizes:
#   - Apple M1 (ARM64): 8126 bytes
#   - Apple Intel (AMD64): 1982 bytes
#   - Linux Intel (AMD64): 1982 bytes
#
# Setting this also enables you to use values larger than 511 bytes when using
# a Database with the DatabaseFlags::DUP_SORT flag.
#
# This builds LMDB with the -DMDB_MAXKEYSIZE=0 option.
#
# Note: If you are moving database files between architectures then your longest
# stored key must fit within the smallest limit of all architectures used. For
# example, if you are moving databases between Apple M1 and Apple Intel
# computers then you need to keep your keys within the smaller 1982 byte limit.
longer-keys = []