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Diffstat (limited to 'provision-static.sh')
| -rwxr-xr-x | provision-static.sh | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/provision-static.sh b/provision-static.sh new file mode 100755 index 0000000..c2125ee --- /dev/null +++ b/provision-static.sh @@ -0,0 +1,190 @@ +#!/bin/sh +# provision-static.sh - build the static libraries mouseboard needs. +# +# Usage: ./provision-static.sh +# +# Debian (and friends) ship no static libwayland-client or libxkbcommon, so +# this fetches and builds them (plus libffi) with a musl toolchain into +# musl-sysroot/, ready for `make static`. Run it once per machine; an unchanged +# completed sysroot is reused, while changed inputs trigger a clean rebuild. +# +# Prerequisites (Debian): +# apt install musl-tools meson ninja-build bison pkgconf curl libexpat1-dev +set -eu + +ROOT="$(cd "$(dirname "$0")" && pwd)" +SYSROOT="$ROOT/musl-sysroot" +WORK="$ROOT/musl-build" +HOSTCC="${HOSTCC:-cc}" + +# Pick the musl target compiler. An explicit CC always wins. Otherwise, if the +# default cc already targets musl (Alpine, Void-musl) use it directly; on a +# glibc host (Debian, Arch) fall back to the musl-gcc wrapper from musl-tools. +if [ -n "${CC:-}" ]; then + BASECC="$CC" +elif command -v cc >/dev/null 2>&1 && cc -dumpmachine 2>/dev/null | grep -q musl; then + BASECC="cc" +else + BASECC="musl-gcc" +fi + +# Pinned versions and checksums. Override a version only together with its sha. +FFI_VER="${FFI_VER:-3.4.6}" +FFI_SHA="${FFI_SHA:-b0dea9df23c863a7a50e825440f3ebffabd65df1497108e5d437747843895a4e}" +WL_VER="${WL_VER:-1.23.1}" +WL_SHA="${WL_SHA:-864fb2a8399e2d0ec39d56e9d9b753c093775beadc6022ce81f441929a81e5ed}" +XKB_VER="${XKB_VER:-1.7.0}" +XKB_SHA="${XKB_SHA:-65782f0a10a4b455af9c6baab7040e2f537520caa2ec2092805cdfd36863b247}" + +command -v "$BASECC" >/dev/null 2>&1 || { + echo "missing musl compiler: $BASECC" >&2 + echo " glibc host (Debian, Arch): install musl-tools for musl-gcc" >&2 + echo " or point CC at your musl compiler: CC=... $0" >&2 + exit 1 +} +for t in "$HOSTCC" meson ninja bison curl pkg-config sha256sum \ + tar make nproc sed; do + command -v "$t" >/dev/null 2>&1 || { echo "missing tool: $t" >&2; exit 1; } +done +JOBS="$(nproc)" + +# wayland-scanner is built from source below and parses XML with expat. +pkg-config --exists expat || { + echo "missing dev library: expat (Debian: libexpat1-dev)" >&2; exit 1; } + +BASECC_PATH="$(command -v "$BASECC")" +HOSTCC_PATH="$(command -v "$HOSTCC")" +BASECC_VERSION="$("$BASECC" --version | sed -n '1p')" +HOSTCC_VERSION="$("$HOSTCC" --version | sed -n '1p')" +MULTIARCH="$("$BASECC" -print-multiarch 2>/dev/null || echo x86_64-linux-gnu)" +SCRIPT_SHA="$(sha256sum "$0" | sed 's/ .*//')" +STAMP="$SYSROOT/.provisioned" +INPUTS="recipe=$SCRIPT_SHA +ffi=$FFI_VER $FFI_SHA +wayland=$WL_VER $WL_SHA +xkbcommon=$XKB_VER $XKB_SHA +target-cc=$BASECC_PATH +target-cc-version=$BASECC_VERSION +host-cc=$HOSTCC_PATH +host-cc-version=$HOSTCC_VERSION +multiarch=$MULTIARCH +cflags=${CFLAGS:-} +cppflags=${CPPFLAGS:-} +ldflags=${LDFLAGS:-}" + +sysroot_complete() { + [ -x "$SYSROOT/bin/cc" ] && + [ -x "$SYSROOT/bin/wayland-scanner" ] && + [ -f "$SYSROOT/lib/libffi.a" ] && + [ -f "$SYSROOT/lib/libwayland-client.a" ] && + [ -f "$SYSROOT/lib/libxkbcommon.a" ] && + [ -f "$SYSROOT/lib/pkgconfig/libffi.pc" ] && + [ -f "$SYSROOT/lib/pkgconfig/wayland-client.pc" ] && + [ -f "$SYSROOT/lib/pkgconfig/xkbcommon.pc" ] && + [ -f "$SYSROOT/include/wayland-client.h" ] && + [ -f "$SYSROOT/include/xkbcommon/xkbcommon.h" ] +} + +if [ -d "$SYSROOT" ]; then + OLD_INPUTS="" + [ ! -f "$STAMP" ] || OLD_INPUTS="$(cat "$STAMP")" + if [ "$OLD_INPUTS" != "$INPUTS" ] || ! sysroot_complete; then + echo "static sysroot stale or incomplete; rebuilding $SYSROOT" + rm -rf "$SYSROOT" + fi +fi + +# Fetch a file if absent, then verify its checksum (fails loud on mismatch). +fetch() { # url sha + file="$(basename "$1")" + [ -f "$file" ] || curl -fsSLO "$1" + echo "$2 $file" | sha256sum -c - || { rm -f "$file"; exit 1; } +} + +# Sysroot libs resolve first while building the deps themselves (wayland +# needs the sysroot's libffi.pc). +export PKG_CONFIG_PATH="$SYSROOT/lib/pkgconfig:$SYSROOT/share/pkgconfig:${PKG_CONFIG_PATH:-}" + +mkdir -p "$WORK" "$SYSROOT/bin" + +# musl-gcc only exposes musl's libc headers, not the Linux kernel uapi headers +# (linux/*, asm/*) from linux-libc-dev. Wrap it to add them at lowest priority +# so musl's libc headers still win. The wrapper lands in musl-sysroot/bin/cc; +# `make static` compiles with it too. On musl-native distros the extra +# -idirafter flags are harmless. +MCC="$SYSROOT/bin/cc" +printf '#!/bin/sh\nexec "%s" -idirafter /usr/include -idirafter /usr/include/%s "$@"\n' \ + "$BASECC_PATH" "$MULTIARCH" > "$MCC" +chmod +x "$MCC" + +cd "$WORK" + +# ---- libffi (autotools): wayland's marshalling needs it ---- +if [ ! -f "$SYSROOT/lib/pkgconfig/libffi.pc" ]; then + fetch "https://github.com/libffi/libffi/releases/download/v$FFI_VER/libffi-$FFI_VER.tar.gz" "$FFI_SHA" + rm -rf "libffi-$FFI_VER" + tar xf "libffi-$FFI_VER.tar.gz" + cd "libffi-$FFI_VER" + ./configure CC="$MCC" --prefix="$SYSROOT" --libdir="$SYSROOT/lib" \ + --disable-shared --enable-static --disable-docs + make -j"$JOBS" + make install + cd "$WORK" +fi + +# ---- wayland-scanner (native host tool, pinned to WL_VER) ---- +# wayland's library build needs a wayland-scanner at least as new as the +# library, but distros ship older ones (CI had 1.22.0 vs 1.23.1). Build it +# from the pinned source with the host compiler (glibc + host expat) into the +# sysroot, so the version always matches and nothing depends on the host copy. +# The static mouseboard build uses this scanner too (see Makefile). +if [ ! -x "$SYSROOT/bin/wayland-scanner" ]; then + fetch "https://gitlab.freedesktop.org/wayland/wayland/-/releases/$WL_VER/downloads/wayland-$WL_VER.tar.xz" "$WL_SHA" + rm -rf "wayland-$WL_VER" wl-scanner-build + tar xf "wayland-$WL_VER.tar.xz" + CC="$HOSTCC_PATH" meson setup "wayland-$WL_VER" wl-scanner-build \ + --prefix="$SYSROOT" --libdir=lib --buildtype=release \ + -Dscanner=true -Dlibraries=false -Dtests=false \ + -Ddocumentation=false -Ddtd_validation=false + ninja -C wl-scanner-build + ninja -C wl-scanner-build install +fi + +# ---- wayland (libraries, static/musl; uses the scanner built above) ---- +if [ ! -f "$SYSROOT/lib/pkgconfig/wayland-client.pc" ]; then + fetch "https://gitlab.freedesktop.org/wayland/wayland/-/releases/$WL_VER/downloads/wayland-$WL_VER.tar.xz" "$WL_SHA" + rm -rf "wayland-$WL_VER" wl-build + tar xf "wayland-$WL_VER.tar.xz" + CC="$MCC" meson setup "wayland-$WL_VER" wl-build \ + --prefix="$SYSROOT" --libdir=lib -Ddefault_library=static \ + --buildtype=release \ + -Dscanner=false -Dlibraries=true -Dtests=false \ + -Ddocumentation=false -Ddtd_validation=false + ninja -C wl-build + ninja -C wl-build install +fi + +# ---- libxkbcommon (no x11, registry, tools, docs -> no extra deps) ---- +if [ ! -f "$SYSROOT/lib/pkgconfig/xkbcommon.pc" ]; then + fetch "https://xkbcommon.org/download/libxkbcommon-$XKB_VER.tar.xz" "$XKB_SHA" + rm -rf "libxkbcommon-$XKB_VER" xkb-build + tar xf "libxkbcommon-$XKB_VER.tar.xz" + CC="$MCC" meson setup "libxkbcommon-$XKB_VER" xkb-build \ + --prefix="$SYSROOT" --libdir=lib -Ddefault_library=static \ + --buildtype=release \ + -Denable-x11=false -Denable-docs=false -Denable-xkbregistry=false \ + -Denable-tools=false -Denable-bash-completion=false + ninja -C xkb-build + ninja -C xkb-build install +fi + +if ! sysroot_complete; then + echo "static sysroot incomplete after provisioning" >&2 + exit 1 +fi +printf '%s\n' "$INPUTS" >"$STAMP.tmp" +mv "$STAMP.tmp" "$STAMP" + +echo +echo "sysroot ready: $SYSROOT" +echo "build the static binary with: make static" |