Compile error for libsql-ffi feature sqlean-extension-regexp under macOS arm64

[jamesaoverton]

Thanks to @sivukhin for bundling sqlean's regexp extension in PR #2160. It works for me under Linux, but under macOS arm64 I get a compiler error ld: archive member '9b5fb81abcc0eb79-pcre2_internal.o' not a mach-o file in '[...]libsql/target/debug/build/libsql-ffi-27754f27da3d637e/out/liblibsql.a'

My system: macOS 15.5, Apple M4 Pro processor, rustc 1.85.0 (4d91de4e4 2025-02-17).

Steps to reproduce:

git clone https://github.com/tursodatabase/libsql.git
cd libsql/libsql-ffi
cargo build # succeeds
cargo test # succeeds
cargo build --features sqlean-extension-regexp # succeeds
cargo test --features sqlean-extension-regexp # compiler error

Line 258 of libsql-ffi/build.rs says sqlean_patterns.push("regexp/pcre2/pcre2_internal.h");, which is the only sqlean_patterns line that includes an .h file.

libsql/libsql-ffi/build.rs

Line 258 in 71906fa

sqlean_patterns.push("regexp/pcre2/pcre2_internal.h");

When I comment that line out compilation succeeds, but when I run the code, the regexp functions don't seem to be defined: I get runtime errors like SqliteFailure(1, "no such function: regexp_like").

This is not an area I know much about. Happy to provide more information.