Get static builds working again by switching to musl.

Author: greglook

CHANGELOG.md

@@ -22,6 +22,7 @@ This project adheres to [Semantic Versioning](http://semver.org/).
   prevent garbling unicode characters.
   [#108](https://github.com/greglook/cljstyle/issues/108)
   [#110](https://github.com/greglook/cljstyle/issues/110)
+- Fix static builds by switching to musl.
 
 
 ## [0.16.626] - 2024-01-06

Dockerfile

@@ -30,8 +30,11 @@ RUN clojure -T:build fetch-deps
 COPY . .
 RUN ./bin/build graal-uberjar
 
-# Build native-image
+# Setup musl compiler if building a static binary
 ARG GRAAL_STATIC="false"
+RUN if [ "$GRAAL_STATIC" = true ]; then ./bin/build setup-musl; fi
+
+# Build native-image
 RUN ./bin/build native-image :graal-static $GRAAL_STATIC
 
 # Install tool

bin/build

@@ -12,6 +12,19 @@ elif [[ $1 = hiera ]]; then
     shift
     exec clojure -X:hiera "$@"
 
+elif [[ $1 = setup-musl ]]; then
+    # This should only really run in the context of the Docker image builder for static binaries
+    apt install -y musl-tools
+    ZLIB_VERSION="1.2.13"
+    curl -sLO --fail --show-error "https://zlib.net/fossils/zlib-${ZLIB_VERSION}.tar.gz"
+    tar xf "zlib-${ZLIB_VERSION}.tar.gz"
+    cd "zlib-${ZLIB_VERSION}"
+    CC=musl-gcc ./configure --static --prefix=/usr/local
+    make CC=musl-gcc
+    make install
+    cd ..
+    install -Dm644 /usr/local/lib/libz.a /usr/lib/x86_64-linux-musl/libz.a
+
 elif [[ $1 = native-image ]]; then
     shift
     GRAAL_ROOT="${GRAAL_ROOT:-$HOME/.local/share/graalvm}"

build.clj

@@ -370,7 +370,10 @@
                  "--verbose"])
               ;; Static build flag
               (when (:graal-static opts)
-                "--static")]
+                ["--libc=musl"
+                 ;; see https://github.com/oracle/graal/issues/3398
+                 "-H:CCompilerOption=-Wl,-z,stack-size=2097152"
+                 "--static"])]
         result (b/process {:command-args (remove nil? (flatten args))})]
     (when-not (zero? (:exit result))
       (binding [*out* *err*]