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Merged
merged 2 commits into from
Mar 8, 2020
Merged

Place source and build products in OUT_DIR #31

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11cc318
Place source and build products in OUT_DIR
jturner314 Feb 19, 2020
f619b93
Add shared-build-cache feature
jturner314 Mar 6, 2020
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1 change: 1 addition & 0 deletions Cargo.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -37,6 +37,7 @@ cblas = []
lapacke = []
static = []
system = []
shared-build-cache = []

[dev-dependencies]
libc = "0.2"
9 changes: 7 additions & 2 deletions README.md
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Expand Up @@ -8,8 +8,13 @@ The following Cargo features are supported:

* `cblas` to build CBLAS (enabled by default),
* `lapacke` to build LAPACKE (enabled by default),
* `static` to link to OpenBLAS statically, and
* `system` to skip building the bundled OpenBLAS.
* `static` to link to OpenBLAS statically,
* `system` to skip building the bundled OpenBLAS, and
* `shared-build-cache` to place most of the OpenBLAS build products in
`~/.cargo` instead of the `target` directory. (This allows them to be reused
between crates which have different `target` directories, in order to avoid
rebuilding OpenBLAS unnecessarily. However, it prevents `cargo clean` from
removing the OpenBLAS build products.)

## Cross Compilation

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6 changes: 5 additions & 1 deletion build.rs
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Expand Up @@ -32,7 +32,11 @@ fn main() {
_ => variable!("TARGET"),
};
env::remove_var("TARGET");
let source = PathBuf::from(format!("source_{}", target.to_lowercase()));
let source = if feature!("SHARED_BUILD_CACHE") {
PathBuf::from(format!("source_{}", target.to_lowercase()))
} else {
output.join(format!("source_{}", target.to_lowercase()))
};
if !source.exists() {
let source_tmp = PathBuf::from(format!("{}_tmp", source.display()));
if source_tmp.exists() {
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