vector support on x86 32 bit

[bmallya]

Hello,

In the downloads section, I did not see any off the shelf binaries available for 32 bit systems. Then I tried to look if there is any docker image in the rust embedded section which can be used to compile using cross, but did not find any.

Is this supported?

[jszwedko]

Hi @bmallya !

You are correct, we don't currently build for i686. We do build for armv7 though, which is 32-bit, so it might not be too hard to get working.

I tried it just now by adding the following diff:

diff --git a/Cargo.toml b/Cargo.toml
index 47952cd96..7e42a0ef4 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -363,6 +363,7 @@ target-x86_64-unknown-linux-musl = ["api", "api-client", "disk-buffer", "rdkafka
 target-powerpc64le-unknown-linux-gnu = ["api", "api-client", "disk-buffer", "enrichment-tables", "rdkafka-cmake", "sinks", "sources", "sources-dnstap", "transforms", "unix", "vendor-libz", "vendor-openssl", "vrl-cli", "datadog-pipelines"]
 # currently doesn't build due to lack of support for 64-bit atomics
 target-powerpc-unknown-linux-gnu = ["api", "api-client", "disk-buffer", "enrichment-tables", "rdkafka-cmake", "sinks", "sources", "sources-dnstap", "transforms", "unix", "vendor-libz", "vendor-openssl", "vrl-cli", "datadog-pipelines"]
+target-i686-unknown-linux-gnu = ["api", "api-client", "disk-buffer", "enrichment-tables", "rdkafka-cmake", "sinks", "sources", "sources-dnstap", "transforms", "unix", "vendor-libz", "vendor-openssl", "vrl-cli", "datadog-pipelines"]

 # Enables `rdkafka` dependency.
 # This feature is more portable, but requires `cmake` as build dependency. Use it if `rdkafka-plain` doesn't work.
diff --git a/scripts/cross/i686-unknown-linux-gnu.dockerfile b/scripts/cross/i686-unknown-linux-gnu.dockerfile
new file mode 100644
index 000000000..68da34d72
--- /dev/null
+++ b/scripts/cross/i686-unknown-linux-gnu.dockerfile
@@ -0,0 +1,4 @@
+FROM rustembedded/cross:i686-unknown-linux-gnu
+
+COPY bootstrap-ubuntu.sh .
+RUN ./bootstrap-ubuntu.sh

But ran into clang issues:

error: failed to run custom build command for `onig_sys v69.7.1`

Caused by:
  process didn't exit successfully: `/target/release/build/onig_sys-3f43075698c84254/build-script-build` (exit status: 101)
  --- stderr
  thread 'main' panicked at 'Unable to find libclang: "couldn't find any valid shared libraries matching: ['libclang.so', 'libclang-*.so', 'libclang.so.*', 'libclang-*.so.*'], set the `LIBCLANG_PATH` environment variable to a path where one of these files can be found (invalid: [])"', /cargo/registry/src/github.com-1ecc6299db9ec823/bindgen-0.56.0/src/lib.rs:1922:31
  note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

So we'll probably need to dig into that more. I'll convert this to an issue to gauge demand for i686 so we can prioritize it if there is sufficient demand. EDIT created #10223

[bmallya]

Thanks for the quick response @jszwedko