David Rusu 632ef6f643 fix: host -fPIC Linux archives from the fork instead of building from source
Building rapidsnark from source in build.rs required cmake/nasm/gmp on every
runner, which the self-hosted CI hosts lack. Instead, host pre-built -fPIC
static archives as a fork GitHub release and download them like before.

- build.rs: reverted to the download-based approach (the PIC archives are built
  on glibc 2.35 so they carry no __isoc23 references; no compat shim needed).
- download_rapidsnark.sh: Linux x86_64/arm64 now download the -fPIC rebuilds
  from this fork's `rapidsnark-pic-*` release; macOS/iOS/Android keep using the
  upstream iden3 archives (which work fine).
- Add .github/workflows/build-pic-archives.yml: builds the -fPIC archives
  (rapidsnark + GMP) inside a glibc-2.35 container and publishes/updates the
  release. Trigger by pushing a `rapidsnark-pic-*` tag or via workflow_dispatch.

Verified locally (glibc-2.35 container): the produced archives link into a
-shared cdylib with rust-lld.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-07 11:00:45 -04:00
..