From db0cf4529f62741f0238981af83deb0dd06e3c3f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sosth=C3=A8ne=20Gu=C3=A9don?= <sosthene@nitrokey.com>
Date: Tue, 12 Dec 2023 16:46:25 +0100
Subject: [PATCH] Make use of intrinsics a feature-flag

---
 Cargo.toml | 3 ++-
 build.rs   | 6 ++++--
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/Cargo.toml b/Cargo.toml
index 7f65a06..6ee61f7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -19,4 +19,5 @@ cc = "1"
 [features]
 assertions = []
 trace = []
-malloc = []
\ No newline at end of file
+malloc = []
+software-intrinsics = []
diff --git a/build.rs b/build.rs
index c8d27d7..0cbeccd 100644
--- a/build.rs
+++ b/build.rs
@@ -11,8 +11,10 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
         .flag("-DLFS_NO_ERROR")
         .file("littlefs/lfs.c")
         .file("littlefs/lfs_util.c")
-        .file("string.c")
-    ;
+        .file("string.c");
+
+    #[cfg(feature = "software-intrinsics")]
+    let builder = builder.flag("-DLFS_NO_INTRINSICS");
 
     #[cfg(not(feature = "assertions"))]
     let builder = builder.flag("-DLFS_NO_ASSERT");