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https://github.com/luxfi/accel.git
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zeekay
e830255ea3
cgo says a C compiler is available. It does not say libluxgpu_hqc and lux/gpu/hqc.h are installed. code_cpu.go declared the second fact as the first, so any consumer that turns cgo on for an unrelated reason — blst, say — had to carry a luxgpu install or fail to compile: ops/code/code_cpu.go:102:10: fatal error: lux/gpu/hqc.h: No such file or directory Two facts, two predicates. This restores the pairing ops/code carried through v1.2.4 and that every other optional native link in accel still uses: crypto_secp256k1_cgo.go and ops/crypto/crypto_msm_native.go behind lux_crypto_native, ops/fhe/cgo.go behind luxfhe, internal/capi/real.go behind lux_accel_real. ops/code was the lone file keyed on bare cgo. code_nocgo.go covers the complement, so a plain cgo build now reports ErrNativeHQCUnavailable — the error the API already documents — instead of failing to build. -tags=lux_hqc_native links the native oracle unchanged. Verified: build + test at CGO=0; CGO=1 with and without the tag; both again under -tags=accel. Full suite green.
43 lines
1.6 KiB
Go
43 lines
1.6 KiB
Go
// Copyright (C) 2024-2026, Lux Industries Inc. All rights reserved.
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// See the file LICENSE for licensing terms.
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//go:build cgo && !hqc_pqclean && lux_hqc_native
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// Standalone `randombytes` shim for the accel/ops/code binding.
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//
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// PQClean's HQC reference (inside libluxgpu_hqc.a) calls `extern int
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// randombytes(out, n)` for every entropy byte it needs. When this
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// package is consumed in isolation (e.g. by `go test ./ops/code/...`
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// or a downstream service that does NOT also link luxfi/crypto/hqc),
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// no other TU provides that symbol; this file does.
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//
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// The build tag `hqc_pqclean` deliberately matches the tag that
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// luxfi/crypto/hqc uses to wire in its OWN `randombytes_shim.c`.
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// When that tag is set, both crypto/hqc and accel/ops/code are
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// linked into the same binary — only crypto/hqc's shim provides
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// `randombytes`, and that shim dispatches between the TLS seed
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// buffer (for batch ops) and the Go io.Reader (for single-op
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// dispatch). Excluding this file in that case prevents the
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// duplicate-symbol link error.
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package code
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/*
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#include <stdint.h>
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#include <stddef.h>
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// Forward declaration of the TLS seed reader exposed by libluxgpu_hqc.
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extern int lux_hqc_randombytes(uint8_t* out, size_t n);
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// randombytes — strong definition for standalone accel/ops/code use.
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// Forwards to the canonical TLS seed reader. The C++ batch kernel
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// pre-installs a per-slot seed slice before each inner PQClean
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// invocation, so every read here returns deterministic bytes from
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// the caller-provided seed buffer.
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int randombytes(uint8_t* out, size_t n);
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int randombytes(uint8_t* out, size_t n) {
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return lux_hqc_randombytes(out, n);
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}
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*/
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import "C"
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