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Add musl libc #557

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67 changes: 67 additions & 0 deletions packages/musl/build.ncl
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Original file line number Diff line number Diff line change
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let { BuildSpec, Local, OutputBin, OutputData, OutputLib, Source, Test, .. } = import "minimal.ncl" in

let version = "1.2.6" in

let base = import "../base/build.ncl" in
let binutils = import "../binutils/build.ncl" in
let make = import "../make/build.ncl" in
let toolchain = import "../toolchain/build.ncl" in

{
name = "musl",

build_deps = [
{ file = "build.sh" } | Local,
{
url = "https://git.musl-libc.org/cgit/musl/snapshot/musl-%{version}.tar.gz",
sha256 = "e9db8b70b0cba3db43b27e84ccd8a0c0958b40029a1c36c9f13817b93787b4d6",
extract = true,
strip_prefix = "musl-%{version}",
} | Source,
base,
toolchain,
make,
],

runtime_deps = [],

cmd = "./build.sh",
build_args = {
include version,
},

outputs = {
bins = { glob = "usr/bin/*" } | OutputBin,
musl_bins = { glob = "usr/local/musl/bin/*" } | OutputBin,
libs = { glob = "usr/local/musl/lib/*" } | OutputLib,
headers = { glob = "usr/local/musl/include/**" } | OutputData,
},

attrs = {
upstream_version = version,
},

tests = {
compile_and_run =
{
class = 'Standalone,
test_deps = [base, toolchain, binutils],
cmds = [
["/bin/bash", "-c", "echo '#include <stdio.h>\nint main() { printf(\"Hello from musl!\\n\"); return 0; }' > test.c"],
["/bin/bash", "-c", "musl-gcc test.c -o test"],
["/bin/bash", "-c", "./test | grep 'Hello from musl!'"],
],
} | Test,
compile_static =
{
class = 'Standalone,
test_deps = [base, toolchain, binutils],
cmds = [
["/bin/bash", "-c", "echo '#include <stdio.h>\nint main() { printf(\"Hello from musl!\\n\"); return 0; }' > test.c"],
["/bin/bash", "-c", "musl-gcc -static test.c -o test_static"],
["/bin/bash", "-c", "./test_static | grep 'Hello from musl!'"],
["/bin/bash", "-c", "ldd test_static 2>&1 | grep 'not a dynamic executable'"],
],
} | Test,
},
} | BuildSpec
24 changes: 24 additions & 0 deletions packages/musl/build.sh
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#!/bin/bash
set -euo pipefail


export CFLAGS="-O3 -pipe -ffile-prefix-map=$(pwd)=/builddir -gno-record-gcc-switches"
export LDFLAGS="-Wl,--build-id=none"
export ARFLAGS=Drc

./configure --prefix=/usr/local/musl --syslibdir=/usr/local/musl/lib
make -j$(nproc)
make DESTDIR=$OUTPUT_DIR install

# Minimal's sandbox requires symlinks to be relative to the output directory
# musl creates an absolute symlink: ld-musl-<arch>.so.1 -> /usr/local/musl/lib/libc.so
cd $OUTPUT_DIR/usr/local/musl/lib
for f in ld-musl-*.so.1; do
if [ -L "$f" ]; then
ln -sf libc.so "$f"
fi
done

# Expose musl-gcc in the standard PATH so it's easy to use
mkdir -p $OUTPUT_DIR/usr/bin
ln -sf ../local/musl/bin/musl-gcc $OUTPUT_DIR/usr/bin/musl-gcc