mirror of
https://github.com/trussed-dev/littlefs2-sys.git
synced 2026-06-20 04:16:31 -07:00
Robin Krahl
65e2a03484
In #27, we updated littlefs to a patched version that backports a change from littlefs v2.11 (filesystem shrinking) and adds a feature that has not been merged upstream yet (config flag to disable block count check on mount). To be able to cut a new release without rolling out these changes to all users, this patch adds the new unstable-littlefs-patched feature that enables these changes.
84 lines
2.6 KiB
Rust
84 lines
2.6 KiB
Rust
use std::env;
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use std::path::PathBuf;
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fn main() -> Result<(), Box<dyn std::error::Error>> {
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let littlefs_path = if cfg!(feature = "unstable-littlefs-patched") {
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"littlefs-patched"
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} else {
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"littlefs"
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};
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let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
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// Patch lfs.h to remove the lfs_util import because clang fails to locate the
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// libraries for the custom target (especially string.h)
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// Compilation before that succeeds because it's using gcc,
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// which comes as a distribution with these utils.
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// Turns out lfs_utils is not used in lfs.h, and clang properly finds stdint.h and stdbool,
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// but not string.h
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let lfs_h =
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std::fs::read_to_string(format!("{littlefs_path}/lfs.h")).expect("Reading lfs.h succeeds");
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println!("cargo::rerun-if-changed={littlefs_path}/lfs.h");
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let out_lfs_h = out_path.join("lfs.h");
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std::fs::write(
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&out_lfs_h,
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lfs_h.replace(
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r##"#include "lfs_util.h""##,
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"#include <stdint.h>\n#include <stdbool.h>",
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),
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)
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.expect("Failed to write lfs.h");
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let mut builder = cc::Build::new();
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let builder = builder
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.flag("-std=c99")
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.flag("-DLFS_NO_DEBUG")
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.flag("-DLFS_NO_WARN")
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.flag("-DLFS_NO_ERROR")
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.include(&out_path)
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.include(littlefs_path)
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.file(format!("{littlefs_path}/lfs.c"))
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.file(format!("{littlefs_path}/lfs_util.c"))
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.file("string.c");
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#[cfg(feature = "software-intrinsics")]
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let builder = builder.flag("-DLFS_NO_INTRINSICS");
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#[cfg(not(feature = "assertions"))]
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let builder = builder.flag("-DLFS_NO_ASSERT");
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#[cfg(feature = "trace")]
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let builder = builder.flag("-DLFS_YES_TRACE");
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#[cfg(not(feature = "malloc"))]
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builder.flag("-DLFS_NO_MALLOC");
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#[cfg(feature = "multiversion")]
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let builder = builder.flag("-DLFS_MULTIVERSION");
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builder.compile("lfs-sys");
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let bindgen = bindgen::Builder::default()
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.header(out_lfs_h.into_os_string().into_string().unwrap())
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.clang_arg("-std=c99")
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.clang_arg("-DLFS_NO_DEBUG")
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.clang_arg("-DLFS_NO_WARN")
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.clang_arg("-DLFS_NO_ERROR");
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#[cfg(feature = "multiversion")]
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let bindgen = bindgen.clang_arg("-DLFS_MULTIVERSION");
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let bindings = bindgen
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.derive_default(true)
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.use_core()
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.allowlist_item("lfs_.*")
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.allowlist_item("LFS_.*")
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.generate()
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.expect("Unable to generate bindings");
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bindings
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.write_to_file(out_path.join("bindings.rs"))
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.expect("Couldn't write bindings!");
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Ok(())
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}
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