Tweak README.md instructions for building and invoking the binary.
For some reason the old instructions no longer work for me. I've
verified that the updated instructions (from this CL) work fine (at
least for me / on my machine...).
PiperOrigin-RevId: 477832053
diff --git a/cc_bindings_from_rs/README.md b/cc_bindings_from_rs/README.md
index 52a2174..5e4f03b 100644
--- a/cc_bindings_from_rs/README.md
+++ b/cc_bindings_from_rs/README.md
@@ -8,25 +8,26 @@
Most `rustc` cmdline parameters should be supported (e.g. `--crate-type`).
-Example:
+The following example should work in the current dev environment:
```
+$ cd crubit/cc_bindings_from_rs
+$ bazel build :cc_bindings_from_rs
+...
+$ CC_BINDINGS_FROM_RS_BINARY=$(find `bazel info bazel-bin` -name cc_bindings_from_rs -type f)
+$ export LD_LIBRARY_PATH=$PWD/../../unsupported_toolchains/rust/toolchains/nightly/lib/rustlib/x86_64-unknown-linux-gnu/lib
-$ cat scratch/test.rs
+$ echo > test.rs "
pub fn public_function() {
private_function()
}
-
fn private_function() {}
+"
-$ bazel run \
- //cc_bindings_from_rs:cc_bindings_from_rs_legacy_toolchain_runner -- \
- --h-out=$(pwd)/test.h -- \
- $(pwd)/test.rs \
- --crate-type=lib \
- --sysroot $(pwd)/third_party/unsupported_toolchains/rust/toolchains/nightly
+$ $CC_BINDINGS_FROM_RS_BINARY --h-out=test.h -- test.rs --crate-type=lib \
+ --sysroot $(pwd)/../../unsupported_toolchains/rust/toolchains/nightly
-$ cat bazel-out/scratch/test.h
+$ cat test.h
// Automatically @generated C++ bindings for the following Rust crate:
// test
