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Optimize build for libbz2.a #88

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Optimize build for libbz2.a #88

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f8d1029
Use `--gc-sections` to remove unused symbols from `libbz2.a`
NobodyXu Jan 27, 2023
e952617
Add new feature `fat-lto` & `thin-lto`
NobodyXu Jan 27, 2023
0f8f115
Add new feat `thin` to use opt-level `z`
NobodyXu Jan 28, 2023
814695e
Remove unused `-Wl` linker args
NobodyXu Feb 1, 2023
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6 changes: 6 additions & 0 deletions bzip2-sys/build.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -25,6 +25,12 @@ fn main() {

let dst = PathBuf::from(env::var_os("OUT_DIR").unwrap());

cfg.flag_if_supported("-ffunction-sections")
.flag_if_supported("-fdata-sections")
.flag_if_supported("-fmerge-all-constants")
.flag_if_supported("-Wl,--gc-sections")
.flag_if_supported("-Wl,--icf=safe");
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Makes sense to have -ffunction-sections and co. -Wl,--gc-sections and -Wl,--icf=safe can be omitted though as those only apply to linking by the cc crate, but we only build a staticlib here. They don't have any effect on linking done by rustc.


cfg.include("bzip2-1.0.8")
.define("_FILE_OFFSET_BITS", Some("64"))
.define("BZ_NO_STDIO", None)
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