From 86e1184794e26af08a7971c990004cd573fc43b1 Mon Sep 17 00:00:00 2001
From: Alix ANNERAUD <alix@anneraud.fr>
Date: Fri, 25 Jul 2025 21:32:52 +0200
Subject: [PATCH] Add LITTLEFS_CONFIG support and adjust bindings for wasm32
 target

---
 build.rs | 18 ++++++++++++++++--
 string.c |  2 +-
 2 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/build.rs b/build.rs
index 2c2105d..b6253a8 100644
--- a/build.rs
+++ b/build.rs
@@ -46,6 +46,12 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     #[cfg(not(feature = "malloc"))]
     builder.flag("-DLFS_NO_MALLOC");
 
+    if let Ok(lfs_config) = env::var("LITTLEFS_CONFIG") {
+        builder.define("LFS_CONFIG", Some(lfs_config.as_str()));
+        println!("cargo::rerun-if-env-changed=LITTLEFS_CONFIG");
+        println!("cargo::rerun-if-changed={}", lfs_config);
+    }
+
     #[cfg(feature = "multiversion")]
     let builder = builder.flag("-DLFS_MULTIVERSION");
 
@@ -61,11 +67,19 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     #[cfg(feature = "multiversion")]
     let bindgen = bindgen.clang_arg("-DLFS_MULTIVERSION");
 
-    let bindings = bindgen
+    let mut bindings_builder = bindgen
         .derive_default(true)
         .use_core()
         .allowlist_item("lfs_.*")
-        .allowlist_item("LFS_.*")
+        .allowlist_item("LFS_.*");
+
+    if let Ok(target) = env::var("TARGET") {
+        if target == "wasm32-unknown-unknown" {
+            bindings_builder = bindings_builder.clang_arg("-fvisibility=default");
+        }
+    }
+
+    let bindings = bindings_builder
         .generate()
         .expect("Unable to generate bindings");
 
diff --git a/string.c b/string.c
index a2ab96c..3fdefb4 100644
--- a/string.c
+++ b/string.c
@@ -5,7 +5,7 @@
  *  Copyright (C) 1991, 1992  Linus Torvalds
  */
 
-#include <string.h>
+#include <stddef.h>
 
 size_t strspn(const char *s, const char *accept)
 {