mirror of
https://github.com/luxfi/dex.git
synced 2026-09-24 00:26:31 +00:00
zooqueen
f2e3705e96
CGO_ENABLED=1 go build ./... failed to link every binary importing pkg/lx: signed_order_gpu.go unconditionally force-linked the Apple-only libsecp256k1_metal.a via a hardcoded build-tree -L path and the signed-order Metal anchor. That archive is not built by default and has no pkg-config bundle, so the link aborted with 'library secp256k1_metal not found'. The GPU-vs-CPU choice must be a runtime decision, never a hard build-time link dependency on an absent accelerator. - Gate the secp256k1 Metal force-link anchor (.go + .c) behind the opt-in 'lux_secp256k1_metal' build tag and move the Metal/Foundation LDFLAGS there. Default CGO builds now link and run the secp256k1 CPU ecrecover pipeline (via the working lux-crypto-secp256k1 .pc); the Metal accelerator, when its archive is built and the tag is set, is still resolved at runtime by cpp/ecrecover.cpp via dlsym gated on LUX_SECP256K1_METALLIB / LUX_SECP256K1_BACKEND. - signed_order_gpu.go keeps only the CPU pkg-config; the anchor file documents the build + opt-in recipe. - signed_order_cpu.go: verifyOrdersCPU returns nil for empty input, matching the cgo BatchVerifyOrders contract so CPU and cgo paths agree byte-for-byte (fixes TestBatchVerifyOrders_Empty under CGO=0). - README: remove the non-existent 'dex_gpu' build-tag claim; document the real model — AMM/CLOB GPU paths live in pkg/lx, bind the luxcpp DEX kernels via pkg-config (lux-dex-amm-metal / -amm-cuda / -clob-cuda), and select GPU-vs-CPU at runtime via crypto/backend detection with a logged, honest CPU fallback. The DEX AMM Metal bridge (amm_xyk_batch_metal) now compiles, links, and its dispatch is byte-identical to the CPU oracle (parity test green under CGO=1). CLOB GPU primitive (MatchOrderGPU) stays a flat-buffer parity/backtest primitive, intentionally not wired into the live linked-list MatchOrders() engine. Verified: CGO_ENABLED=0 go test ./... green (16 pkgs, 1360 cases); CGO_ENABLED=1 go build ./... exit 0.