build: add autotools bootstrap skeleton with C23 flags

.gitignore

@@ -52,3 +52,27 @@ Module.symvers
 Mkfile.old
 dkms.conf
 
+# ---> Autotools (all generated by autoreconf/configure; only the .am/.ac
+#      inputs are tracked in git)
+configure
+config.log
+config.status
+aclocal.m4
+autom4te.cache/
+Makefile
+Makefile.in
+compile
+depcomp
+install-sh
+missing
+test-driver
+.deps/
+.dirstamp
+test-suite.log
+*.trs
+*.log
+
+# ---> stupidtools binaries (built, never committed)
+/stupidtools
+/src/stupidtools
+

Makefile.am

@@ -0,0 +1,8 @@
+# Top-level Makefile.am: recursion into src/ plus the test harness.
+# `make check` runs tests/run.sh through automake's parallel test harness
+# (genuinely executed - the harness propagates the script's exit code).
+
+SUBDIRS = src
+
+TESTS = tests/run.sh
+EXTRA_DIST = tests/run.sh

configure.ac

@@ -0,0 +1,27 @@
+# configure.ac - stupidtools bootstrap (autotools, C23).
+#
+# This is the *bootstrap* build only: stupidtools will later generate its
+# own ./configure (self-hosting, todo 23). Only Makefile.am inputs are
+# tracked in git; configure/Makefile* are generated and gitignored.
+
+AC_PREREQ([2.71])
+AC_INIT([stupidtools], [1.0.0], [[email protected]])
+AM_INIT_AUTOMAKE([foreign subdir-objects])
+AC_CONFIG_SRCDIR([src/main.c])
+AC_PROG_CC
+
+# Require a compiler that actually accepts C23 (ISO/IEC 9899:2024).
+# -std=c23: GCC >= 14, Clang >= 18. Never -std=c2y (next draft, not ratified).
+save_CFLAGS="$CFLAGS"
+CFLAGS="$CFLAGS -std=c23 -Werror"
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
+  [[#if !defined(__STDC_VERSION__) || __STDC_VERSION__ < 202311L
+#error "C23 (__STDC_VERSION__ >= 202311L) required"
+#endif]],
+  [[_Static_assert(1, "ok");]])],
+  [],
+  [AC_MSG_ERROR([a C compiler with C23 support (GCC >= 14 or Clang >= 18) is required])])
+CFLAGS="$save_CFLAGS"
+
+AC_CONFIG_FILES([Makefile src/Makefile])
+AC_OUTPUT

src/Makefile.am

@@ -0,0 +1,6 @@
+# src/Makefile.am - build the stupidtools binary (C23, strict warnings).
+
+AM_CFLAGS = -std=c23 -Wall -Wextra -Wpedantic
+
+bin_PROGRAMS = stupidtools
+stupidtools_SOURCES = main.c

src/main.c

@@ -0,0 +1,24 @@
+/*
+ * stupidtools - the GNU AutoTools replacement for the moronic.
+ *
+ * Copyright (c) 2026 huntedbytheirs
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * Minimal skeleton: reports the version. Real CLI parsing (todo 4)
+ * replaces this stub.
+ */
+
+#include <stdio.h>
+
+/* Must match AC_INIT version in configure.ac (todo 1: 1.0.0). */
+#define STUPIDTOOLS_VERSION "1.0.0"
+
+int
+main(int argc, char **argv)
+{
+	(void)argc;
+	(void)argv;
+
+	printf("stupidtools %s\n", STUPIDTOOLS_VERSION);
+	return 0;
+}

tests/run.sh

@@ -0,0 +1,56 @@
+#!/bin/sh
+# tests/run.sh - test runner for stupidtools (skeleton).
+#
+# Grows with the project; today it proves the toolchain works end to end:
+# the binary must exist, run, and report its version.
+#
+# POSIX sh only (dash/bash/zsh safe). Fails fast on the first failed check.
+
+TOP_DIR=$(cd "$(dirname "$0")/.." && pwd) || {
+    echo "FAIL: cannot resolve project root" >&2
+    exit 1
+}
+BIN="$TOP_DIR/src/stupidtools"
+
+TESTS_RUN=0
+TESTS_FAILED=0
+
+pass() {
+    TESTS_RUN=$((TESTS_RUN + 1))
+    printf 'ok %d - %s\n' "$TESTS_RUN" "$1"
+}
+
+fail() {
+    TESTS_RUN=$((TESTS_RUN + 1))
+    TESTS_FAILED=$((TESTS_FAILED + 1))
+    printf 'not ok %d - %s\n' "$TESTS_RUN" "$1" >&2
+}
+
+# --- 1. the built binary must exist and be executable -------------------
+if [ -x "$BIN" ]; then
+    pass "binary exists and is executable: $BIN"
+else
+    fail "binary missing: $BIN (run 'make' first)"
+    printf 'FAILED: %d/%d checks failed\n' "$TESTS_FAILED" "$TESTS_RUN" >&2
+    exit 1
+fi
+
+# --- 2. --version must exit 0 and print exactly 'stupidtools <version>' -
+version_out=
+if version_out=$("$BIN" --version 2>&1); then
+    if [ "$version_out" = "stupidtools 1.0.0" ]; then
+        pass "--version reports: $version_out"
+    else
+        fail "--version output unexpected: '$version_out' (want 'stupidtools 1.0.0')"
+    fi
+else
+    rc=$?
+    fail "--version exited non-zero (rc=$rc): $version_out"
+fi
+
+# --- summary -------------------------------------------------------------
+if [ "$TESTS_FAILED" -ne 0 ]; then
+    printf 'FAILED: %d/%d checks failed\n' "$TESTS_FAILED" "$TESTS_RUN" >&2
+    exit 1
+fi
+printf 'All %d checks passed.\n' "$TESTS_RUN"