Bump minimum supported Rust version to 1.78

Bump the minimum supported Rust version to 1.78. This version will be
required to use newer versions of cargo_metadata.

Signed-off-by: Daniel Müller <deso@posteo.net>

.github/workflows/test.yml

@@ -132,7 +132,7 @@ jobs:
         with:
           # Please adjust README and rust-version field in Cargo.toml files when
           # bumping version.
-          toolchain: 1.71.0
+          toolchain: 1.78.0
           components: rustfmt
       - uses: Swatinem/rust-cache@v2
       - name: Build

Cargo.toml

@@ -1,7 +1,7 @@
 [workspace.package]
 version = "0.25.0-beta.1"
 edition = "2021"
-rust-version = "1.71"
+rust-version = "1.78"
 license = "LGPL-2.1-only OR BSD-2-Clause"
 repository = "https://github.com/libbpf/libbpf-rs"
 homepage = "https://github.com/libbpf/libbpf-rs"

libbpf-cargo/CHANGELOG.md

@@ -9,6 +9,7 @@ Unreleased
   - Removed `--quiet` option of `libbpf make` sub-command
 - Fixed handling of multiple types of same name in BTF by enumerating
   them in the generated skeleton
+- Bumped minimum Rust version to `1.78`
 
 
 0.25.0-beta.1

libbpf-cargo/README.md

@@ -1,5 +1,5 @@
 [![CI](https://github.com/libbpf/libbpf-rs/actions/workflows/test.yml/badge.svg?branch=master)](https://github.com/libbpf/libbpf-rs/actions/workflows/test.yml)
-[![rustc](https://img.shields.io/badge/rustc-1.71+-blue.svg)](https://blog.rust-lang.org/2023/07/13/Rust-1.71.0.html)
+[![rustc](https://img.shields.io/badge/rustc-1.78+-blue.svg)](https://blog.rust-lang.org/2024/05/02/Rust-1.78.0.html)
 
 # libbpf-cargo
 

libbpf-rs/README.md

@@ -1,5 +1,5 @@
 [![CI](https://github.com/libbpf/libbpf-rs/actions/workflows/test.yml/badge.svg?branch=master)](https://github.com/libbpf/libbpf-rs/actions/workflows/test.yml)
-[![rustc](https://img.shields.io/badge/rustc-1.71+-blue.svg)](https://blog.rust-lang.org/2023/07/13/Rust-1.71.0.html)
+[![rustc](https://img.shields.io/badge/rustc-1.78+-blue.svg)](https://blog.rust-lang.org/2024/05/02/Rust-1.78.0.html)
 
 # libbpf-rs
 

libbpf-rs/src/util.rs

@@ -56,7 +56,7 @@ pub fn c_char_slice_to_cstr(s: &[c_char]) -> Option<&CStr> {
 
 /// Round up a number to the next multiple of `r`
 pub fn roundup(num: usize, r: usize) -> usize {
-    ((num + (r - 1)) / r) * r
+    num.div_ceil(r) * r
 }
 
 /// Get the number of CPUs in the system, e.g., to interact with per-cpu maps.
@@ -194,16 +194,10 @@ mod tests {
         assert_eq!(c_char_slice_to_cstr(&slice), None);
 
         let slice = [0];
-        assert_eq!(
-            c_char_slice_to_cstr(&slice).unwrap(),
-            CStr::from_bytes_with_nul(b"\0").unwrap()
-        );
+        assert_eq!(c_char_slice_to_cstr(&slice).unwrap(), c"");
 
         let slice = ['a' as _, 'b' as _, 'c' as _, 0 as _];
-        assert_eq!(
-            c_char_slice_to_cstr(&slice).unwrap(),
-            CStr::from_bytes_with_nul(b"abc\0").unwrap()
-        );
+        assert_eq!(c_char_slice_to_cstr(&slice).unwrap(), c"abc");
 
         // Missing terminating NUL byte.
         let slice = ['a' as _, 'b' as _, 'c' as _];