aminya · aminya · Sep 4, 2026 · Sep 4, 2026
diff --git a/README.md b/README.md
@@ -30,7 +30,7 @@ Setting up a **cross-platform** environment for building and testing C++/C proje
 | category        | tools                                                                                                       |
 | --------------- | ----------------------------------------------------------------------------------------------------------- |
 | compiler        | llvm, gcc, msvc, apple-clang, vcvarsall                                                                     |
-| build system    | cmake, ninja, meson, make, task, bazel                                                                      |
+| build system    | cmake, ninja, meson, make, autoreconf, task, bazel                                                          |
 | package manager | vcpkg, conan, choco, brew, apt-fast, nala, git, setup-cpp                                                   |
 | analyzer/linter | clang-tidy, clang-format, cppcheck, cpplint, flawfinder, lizard, infer, cmakelang, cmake-format, cmake-lint |
 | cache           | ccache, sccache                                                                                             |

diff --git a/action.yml b/action.yml
@@ -106,6 +106,9 @@ inputs:
   make:
     description: "Wether to install make (true/false) or the specific version to install."
     required: false
+  autoreconf:
+    description: "Wether to install autoreconf (true/false) or the specific version to install."
+    required: false
   task:
     description: "Wether to install task (true/false) or the specific version to install."
     required: false

diff --git a/cspell.config.yaml b/cspell.config.yaml
@@ -33,6 +33,7 @@ words:
   - cmakeformat
   - cmakelang
   - cmakelint
+  - autoreconf
   - cobertura
   - copr
   - CPATH

diff --git a/dist/legacy/setup-cpp.js b/dist/legacy/setup-cpp.js
diff --git a/dist/legacy/setup-cpp.js.map b/dist/legacy/setup-cpp.js.map
diff --git a/dist/modern/setup-cpp.mjs b/dist/modern/setup-cpp.mjs
diff --git a/dist/modern/setup-cpp.mjs.map b/dist/modern/setup-cpp.mjs.map
diff --git a/src/__tests__/main.test.ts b/src/__tests__/main.test.ts
@@ -1,6 +1,6 @@
 process.env.SETUP_CPP_SKIP_MAIN = "true"
 import { getCompilerInfo } from "../compilers.js"
-import { parseArgs } from "../setup-cpp.js"
+import { parseArgs, printHelp } from "../setup-cpp.js"
 import { type Inputs, llvmTools } from "../tool.js"
 import { getVersion, syncVersions } from "../versions/versions.js"
 
@@ -108,6 +108,22 @@ describe("syncVersion", () => {
   })
 })
 
+describe("CLI help", () => {
+  it("lists autoreconf among build system tools", () => {
+    const table = jest.spyOn(console, "table").mockImplementation(() => undefined)
+
+    printHelp()
+
+    expect(table).toHaveBeenCalledWith(
+      expect.objectContaining({
+        "build system": { tools: "--cmake, --ninja, --meson, --make, --autoreconf, --task, --bazel" },
+      }),
+      ["tools"],
+    )
+    table.mockRestore()
+  })
+})
+
 describe("getVersion", () => {
   it("gcovr", () => {
     expect(getVersion("gcovr", "5.0")).toBe("5.0")

diff --git a/src/autoreconf/__tests__/autoreconf.test.ts b/src/autoreconf/__tests__/autoreconf.test.ts
@@ -0,0 +1,18 @@
+import type { InstallationInfo } from "../../utils/setup/setupBin.js"
+import { testBin } from "../../utils/tests/test-helpers.js"
+import { setupAutoreconf } from "../autoreconf.js"
+
+jest.setTimeout(300000)
+
+const unixDescribe = process.platform === "win32" ? describe.skip : describe
+
+unixDescribe("setup-autoreconf", () => {
+  it("should setup autoreconf", async () => {
+    const installInfo = await setupAutoreconf()
+    const binDir = (installInfo as InstallationInfo | undefined)?.binDir
+
+    await testBin("autoreconf", ["--version"])
+    await testBin("automake", ["--version"])
+    await testBin("libtoolize", ["--version"], binDir)
+  })
+})
diff --git a/src/autoreconf/autoreconf.ts b/src/autoreconf/autoreconf.ts
@@ -0,0 +1,50 @@
+import { join } from "path"
+import { addPath } from "envosman"
+import { hasApk, installApkPack } from "setup-alpine"
+import { hasAptGet, installAptPack } from "setup-apt"
+import { getBrewDir, installBrewPack } from "setup-brew"
+import { rcOptions } from "../options.js"
+import type { SetupOptions } from "../setup-options.js"
+import { hasDnf } from "../utils/env/hasDnf.js"
+import { isArch } from "../utils/env/isArch.js"
+import { setupDnfPack } from "../utils/setup/setupDnfPack.js"
+import { setupPacmanPack } from "../utils/setup/setupPacmanPack.js"
+
+const packages = ["autoconf", "autoconf-archive", "automake", "libtool"] as const
+
+export async function setupAutoreconf({ version }: Partial<Pick<SetupOptions, "version">> = {}) {
+  switch (process.platform) {
+    case "darwin": {
+      for (const name of packages) {
+        // These installs are intentionally sequential so Homebrew can update its linked tool paths.
+        // eslint-disable-next-line no-await-in-loop
+        await installBrewPack(name, version)
+      }
+
+      const gnuBinDir = join(getBrewDir(), "opt/libtool/libexec/gnubin")
+      await addPath(gnuBinDir, rcOptions)
+      return { binDir: gnuBinDir }
+    }
+    case "linux":
+      if (isArch()) {
+        for (const name of packages) {
+          // pacman package setup is sequential because the shared helper initializes the repository once.
+          // eslint-disable-next-line no-await-in-loop
+          await setupPacmanPack(name, version)
+        }
+        return { binDir: "/usr/bin/" }
+      }
+      if (hasDnf()) {
+        return setupDnfPack(packages.map((name) => ({ name, version })))
+      }
+      if (hasAptGet()) {
+        return installAptPack(packages.map((name) => ({ name, version })))
+      }
+      if (await hasApk()) {
+        return installApkPack(packages.map((name) => ({ name, version })))
+      }
+      throw new Error("Unsupported linux distribution")
+    default:
+      throw new Error("Unsupported platform")
+  }
+}
diff --git a/src/setup-cpp.ts b/src/setup-cpp.ts
@@ -89,7 +89,7 @@ export function parseArgs(args: string[]): CliOpts {
   })
 }
 
-function printHelp() {
+export function printHelp() {
   info(`
 setup-cpp [options]
 setup-cpp --compiler llvm --cmake true --ninja true --ccache true --vcpkg true
@@ -114,7 +114,7 @@ All the available tools:
         tools: "--llvm, --gcc, --msvc, --apple-clang, --vcvarsall",
       },
       "build system": {
-        tools: "--cmake, --ninja, --meson, --make, --task, --bazel",
+        tools: "--cmake, --ninja, --meson, --make, --autoreconf, --task, --bazel",
       },
       "package manager": { tools: "--vcpkg, --conan, --choco, --brew, --apt-fast, --nala, --git, --setup-cpp" },
       "analyzer/linter": {

diff --git a/src/tool.ts b/src/tool.ts
@@ -1,5 +1,6 @@
 import { type InstallationInfo, setupAptFast, setupNala } from "setup-apt"
 import { type SetupBrewOptions, setupBrew } from "setup-brew"
+import { setupAutoreconf } from "./autoreconf/autoreconf.js"
 import { setupBazel } from "./bazel/bazel.js"
 import { setupCcache } from "./ccache/ccache.js"
 import { setupChocolatey } from "./chocolatey/chocolatey.js"
@@ -79,6 +80,7 @@ export const setups = {
   ...appleClangSetups,
   ...cmakeLangSetups,
   cmake: setupCmake,
+  autoreconf: setupAutoreconf,
   ninja: setupNinja,
   vcpkg: setupVcpkg,
   bazel: setupBazel,