92 lines
3.0 KiB
TypeScript
92 lines
3.0 KiB
TypeScript
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/**
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* TinyCC — small embeddable C compiler. Powers bun:ffi's JIT-compile path,
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* where user-provided C gets compiled and linked at runtime.
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*
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* Disabled on Android and FreeBSD — see cfg.tinycc in config.ts.
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*
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* Built via DirectBuild — no cmake sub-process. The old overlay
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* CMakeLists.txt had two recurring ASAN workarounds for the c2str host
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* tool (Linux ASLR/shadow-map, macOS 26.4 dyld deadlock); DirectBuild's
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* no-sanitize-on-host-tools policy sidesteps both.
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*/
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import type { Dependency, DirectBuild } from "../source.ts";
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const TINYCC_COMMIT = "05f0fafaa3be31e31d7b4b5c17dc60f62c991171";
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export const tinycc: Dependency = {
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name: "tinycc",
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versionMacro: "TINYCC",
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// cfg.tinycc encodes the platform exclusions (config.ts).
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enabled: cfg => cfg.tinycc,
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source: () => ({
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kind: "github-archive",
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repo: "oven-sh/tinycc",
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commit: TINYCC_COMMIT,
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}),
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patches: ["patches/tinycc/tcc.h.patch"],
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build: cfg => {
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const sources = ["libtcc.c", "tccpp.c", "tccgen.c", "tccdbg.c", "tccelf.c", "tccasm.c", "tccrun.c"];
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if (cfg.arm64) sources.push("arm64-gen.c", "arm64-link.c", "arm64-asm.c");
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else sources.push("x86_64-gen.c", "x86_64-link.c", "i386-asm.c");
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if (cfg.darwin) sources.push("tccmacho.c");
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if (cfg.windows) sources.push("tccpe.c");
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const defines: Record<string, string | number | true> = {
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CONFIG_TCC_PREDEFS: true,
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ONE_SOURCE: 0,
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TCC_LIBTCC1: "",
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CONFIG_TCC_BACKTRACE: 0,
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// TCC_VERSION only appears in CLI help (tcc.c, not built) and DWARF
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// producer string. Use the commit hash for both so bumping TINYCC_COMMIT
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// is the only thing to update.
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TCC_VERSION: TINYCC_COMMIT.slice(0, 8),
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TCC_GITHASH: TINYCC_COMMIT.slice(0, 8),
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};
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if (cfg.darwin) {
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defines.TCC_TARGET_MACHO = true;
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defines.CONFIG_CODESIGN = true;
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defines.CONFIG_NEW_MACHO = true;
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// CONFIG_USR_INCLUDE was set to sysroot in the cmake version. tccrun
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// uses it to find system headers at runtime; bun:ffi doesn't exercise
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// that path (we only use libtcc as a backend, not the full preprocessor
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// driver) so we leave it at the default.
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}
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if (cfg.windows) defines.CONFIG_WIN32 = true;
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const spec: DirectBuild = {
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kind: "direct",
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sources,
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defines,
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includes: [".", "include"],
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cflags: ["-fno-strict-aliasing"],
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// tcc sources #include "config.h" — autotools would generate it,
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// we just stub it.
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headers: { "config.h": "" },
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// conftest.c with -DC2STR compiles to a tool that turns tccdefs.h
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// (C macros) into tccdefs_.h (C string literal for embedding).
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// tccpp.c includes the generated file.
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codegen: {
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tool: "conftest.c",
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toolDefines: { C2STR: true },
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args: ["include/tccdefs.h", "$out"],
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output: "tccdefs_.h",
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},
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};
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// clang-cl is noisy about tinycc's old-C idioms.
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if (cfg.windows) spec.cflags!.push("-w");
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return spec;
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},
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provides: () => ({
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libs: [],
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includes: [],
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}),
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};
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