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Merge pull request #309 from jgalenson/file-prefix-map 

Support deterministic builds by remapping the __FILE__ prefix if the …
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Alex Crichton 2019-08-19 17:20:33 -05:00 committed by GitHub
parent 36da64f20e c8f7928916
commit f0b43234dd
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1 changed files with 5 additions and 0 deletions
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build.rs
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@ -423,6 +423,11 @@ mod c {
panic!("RUST_COMPILER_RT_ROOT={} does not exist", root.display()); panic!("RUST_COMPILER_RT_ROOT={} does not exist", root.display());
} }
// Support deterministic builds by remapping the __FILE__ prefix if the
// compiler supports it. This fixes the nondeterminism caused by the
// use of that macro in lib/builtins/int_util.h in compiler-rt.
cfg.flag_if_supported(&format!("-ffile-prefix-map={}=.", root.display()));
let src_dir = root.join("lib/builtins"); let src_dir = root.join("lib/builtins");
for (sym, src) in sources.map.iter() { for (sym, src) in sources.map.iter() {
let src = src_dir.join(src); let src = src_dir.join(src);