packaging: build recipes for arch, gentoo, nix, void, fedora

Five distro recipes in packaging/, all following the same recipe:
unpack the Gitea release archive (which extracts to fastwc/), run
autoreconf -fi (the generated configure/Makefile.in are not committed),
configure, make, make install - the binary needs only glibc.

Each recipe notes the release prerequisite: the archive URL requires a
v0.1.0 tag on the remote, and Arch/Nix/Void carry an integrity
placeholder to fill in once the tag exists. The PKGBUILD was validated
with makepkg --printsrcinfo, and the full build recipe was run
end-to-end from a Gitea-layout tarball (autoreconf, configure, make,
make install DESTDIR) producing a working /usr/bin/fastwc.

packaging/fedora/fastwc.spec

@@ -0,0 +1,43 @@
+Name:           fastwc
+Version:        0.1.0
+Release:        1%{?dist}
+Summary:        A wc replacement that beats GNU wc
+
+License:        MIT
+URL:            https://git.spectoria.dev/huntedbytheirs/fastwc
+# requires a v0.1.0 tag on the Gitea remote
+Source0:        %{url}/archive/v%{version}.tar.gz
+
+BuildRequires:  gcc
+BuildRequires:  make
+BuildRequires:  autoconf
+BuildRequires:  automake
+BuildRequires:  libtool
+
+%description
+fastwc is a single-file wc replacement. It counts lines, words, and
+bytes with SIMD kernels (AVX-512, AVX-2, SSE2, runtime-dispatched),
+maps regular files instead of copying them, and splits large files
+across cores. It never loses to GNU wc on the benchmark suite, and
+never disagrees with its counts.
+
+%prep
+# Gitea archives extract to a directory named after the repo
+%autosetup -n fastwc
+
+%build
+autoreconf -fi
+%configure
+%make_build
+
+%install
+%make_install
+
+%files
+%{_bindir}/fastwc
+%license LICENSE
+%doc README.md docs/PERFORMANCE.md
+
+%changelog
+* Sat Aug 29 2026 huntedbytheirs <[email protected]> - 0.1.0-1
+- Initial packaging