add build.rs
to hint rebuild binary once environment variable change
#88
+3
−0
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env variable change will not trigger re-build by default
For example
ceno/singer/benches/add.rs
Lines 35 to 36 in 10566f5
Environment variable will only be fetch when first time compilation (e.g. cargo run/cargo bench...). Once it first time pass, changing environment variable will not refresh constant definition in binary.
Need to have "build.rs" to hints
cargo
tool.