Files
termscp/dist/release/build_musl_container.sh
Christian Visintin 133ec898d8 ci(release): build Linux artifacts as static musl binaries (#447)
Build Linux release artifacts as statically linked musl binaries for x86_64 and aarch64, update packaging and updater handling, and document the reduced runtime requirements.

Keep release version preparation locked without refreshing dependencies or committing Cargo.lock.

Closes #440
2026-09-03 13:31:16 +02:00

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#!/usr/bin/env sh
# Builds a static musl termscp binary. Runs INSIDE the Alpine container
# started by dist/release/build_musl.sh; /work is the mounted workspace.
#
# Required environment: TARGET, HOST_UID, HOST_GID.
set -eux
NETTLE_VERSION="3.10.1"
GNUTLS_VERSION="3.8.13"
PAVAO_SRC_VERSION="4.24.6"
cleanup() {
chown -R "$HOST_UID:$HOST_GID" /work
}
trap cleanup EXIT
apk add --no-cache \
bison \
binutils \
build-base \
file \
flex \
git \
gnutls-dev \
libgit2-dev \
libgit2-static \
libunistring-dev \
libunistring-static \
linux-headers \
openssl-dev \
openssl-libs-static \
perl \
perl-parse-yapp \
pkgconf \
python3 \
wget \
xz \
zlib-dev \
zlib-static
rustup target add "$TARGET"
cargo fetch --locked
NATIVE_CFLAGS="-O2 -fPIC"
if [ "$TARGET" = "aarch64-unknown-linux-musl" ]; then
NATIVE_CFLAGS="$NATIVE_CFLAGS -mno-outline-atomics"
fi
export CFLAGS="$NATIVE_CFLAGS"
# -- static nettle (GnuTLS crypto backend); mini-gmp avoids a GMP dependency
mkdir -p /tmp/native
wget -q "https://ftp.gnu.org/gnu/nettle/nettle-$NETTLE_VERSION.tar.gz" \
-O /tmp/native/nettle.tar.gz
tar -xzf /tmp/native/nettle.tar.gz -C /tmp/native
cd "/tmp/native/nettle-$NETTLE_VERSION"
./configure \
--prefix=/tmp/native/nettle \
--disable-shared \
--enable-static \
--disable-documentation \
--enable-mini-gmp
make -j"$(getconf _NPROCESSORS_ONLN)"
make install
# -- static GnuTLS; every optional backend is disabled so nothing links
# against a shared library
wget -q "https://www.gnupg.org/ftp/gcrypt/gnutls/v3.8/gnutls-$GNUTLS_VERSION.tar.xz" \
-O /tmp/native/gnutls.tar.xz
tar -xf /tmp/native/gnutls.tar.xz -C /tmp/native
cd "/tmp/native/gnutls-$GNUTLS_VERSION"
PKG_CONFIG_PATH=/tmp/native/nettle/lib/pkgconfig \
./configure \
--prefix=/tmp/native/gnutls \
--disable-shared \
--enable-static \
--disable-doc \
--disable-tests \
--disable-nls \
--disable-hardware-acceleration \
--with-nettle-mini \
--with-included-libtasn1 \
--with-included-unistring \
--without-idn \
--without-p11-kit \
--without-brotli \
--without-zstd \
--without-zlib
make -j"$(getconf _NPROCESSORS_ONLN)"
make install
# -- flatten gnutls.pc: pkg-config must hand the linker the static archives
# directly, with no Requires.private chain to resolve
mkdir -p /tmp/native/pkgconfig
sed \
-e "s#^Libs:.*#Libs: -L/tmp/native/gnutls/lib -lgnutls -latomic -L/tmp/native/nettle/lib -lhogweed -lnettle#" \
-e "/^Requires.private:/d" \
-e "s#^Cflags:.*#Cflags: -I/tmp/native/gnutls/include -I/tmp/native/nettle/include#" \
/tmp/native/gnutls/lib/pkgconfig/gnutls.pc \
> /tmp/native/pkgconfig/gnutls.pc
# -- pavao-src: Samba's replacement library omits two sources that musl needs
cd /work
PAVAO_SRC=$(find "${CARGO_HOME:-/usr/local/cargo}/registry/src" \
-type d -name "pavao-src-$PAVAO_SRC_VERSION" -print -quit)
test -n "$PAVAO_SRC"
cp -R "$PAVAO_SRC" /tmp/pavao-src
perl -0pi -e "s#( \\\"lib/replace/replace\\.c\\\",\\n)#\$1 \\\"lib/replace/closefrom.c\\\",\\n \\\"lib/replace/strptime.c\\\",\\n#" \
/tmp/pavao-src/src/lib.rs
cat >> Cargo.toml <<EOF
[patch.crates-io]
pavao-src = { path = "/tmp/pavao-src" }
EOF
cargo update -p "pavao-src@$PAVAO_SRC_VERSION"
export PKG_CONFIG_ALL_STATIC=1
export PKG_CONFIG_PATH=/tmp/native/pkgconfig:/tmp/native/nettle/lib/pkgconfig:/usr/lib/pkgconfig
export RUSTFLAGS="-C target-feature=+crt-static -C link-arg=-static"
cargo build --locked --release --target "$TARGET" --features smb-vendored
# -- prove the binary is static: no interpreter, no shared libraries
file "target/$TARGET/release/termscp"
if readelf -l "target/$TARGET/release/termscp" > /tmp/program-headers.txt; then
cat /tmp/program-headers.txt
else
status=$?
cat /tmp/program-headers.txt
exit "$status"
fi
if readelf -d "target/$TARGET/release/termscp" > /tmp/dynamic-section.txt; then
cat /tmp/dynamic-section.txt
else
status=$?
cat /tmp/dynamic-section.txt
exit "$status"
fi
if grep -q INTERP /tmp/program-headers.txt; then
exit 1
fi
if grep -q NEEDED /tmp/dynamic-section.txt; then
exit 1
fi