From ca882a2783f66fdf1162f498172da7348d317f41 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Eduardo=20Leegwater=20Sim=C3=B5es?=
 <eduardols@protonmail.com>
Date: Fri, 24 Jan 2025 02:16:08 +0100
Subject: [PATCH] Allow static and dynamic linking

Currently both `userfaultfd` and `userfaultfd-sys` always load libclang
dynamically. This commit keeps this as the default behavior but adds the
"static" and "runtime" features. The "static" feature will statically
link libclang, while "runtime" will load libclang at runtime.

Users using `default-features=false` will need to specify
`features = ["runtime"]` to maintain current behavior, but they should
be in the minority, given that neither crate currently has default
features.
---
 Cargo.toml                 | 8 ++++++--
 userfaultfd-sys/Cargo.toml | 8 ++++++--
 2 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/Cargo.toml b/Cargo.toml
index ec56fd4..6b823cd 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,12 +14,16 @@ cfg-if = "^1.0.0"
 libc = "0.2.65"
 nix = { version = "0.27", features = ["ioctl"] }
 thiserror = "1.0.4"
-userfaultfd-sys = { path = "userfaultfd-sys", version = "^0.5.0" }
+userfaultfd-sys = { path = "userfaultfd-sys", version = "^0.5.0", default-features = false }
 
 [dev-dependencies]
 nix = { version = "0.27", features = ["poll", "mman", "feature"] }
 
 [features]
-default = []
+default = ["runtime"]
+
 linux4_14 = ["userfaultfd-sys/linux4_14", "nix/process"]
 linux5_7 = ["userfaultfd-sys/linux5_7"]
+
+runtime = ["userfaultfd-sys/runtime"]
+static = ["userfaultfd-sys/static"]
diff --git a/userfaultfd-sys/Cargo.toml b/userfaultfd-sys/Cargo.toml
index 9062ce7..4379dbe 100644
--- a/userfaultfd-sys/Cargo.toml
+++ b/userfaultfd-sys/Cargo.toml
@@ -13,10 +13,14 @@ build = "build.rs"
 cfg-if = "^1.0.0"
 
 [build-dependencies]
-bindgen = { version = "^0.68.1", default-features = false, features = ["runtime"]  }
+bindgen = { version = "^0.68.1", default-features = false }
 cc = "1.0"
 
 [features]
-default = []
+default = ["runtime"]
+
 linux4_14 = []
 linux5_7 = []
+
+runtime = ["bindgen/runtime"]
+static = ["bindgen/static"]