Properly toggle --enable-shared when building the musl toolchain

Author: zanieb

cpython-unix/build-musl.sh

@@ -89,10 +89,16 @@ index 4a6ebe4..0000000
 EOF
 fi
 
+SHARED=
+if [ -n "${STATIC}" ]; then
+    SHARED="--disable-shared"
+else
+    SHARED="--enable-shared"
+fi
 
 CFLAGS="${CFLAGS} -fPIC" CPPFLAGS="${CPPFLAGS} -fPIC" ./configure \
     --prefix=/tools/host \
-    --enable-shared
+    "${SHARED}"
 
 make -j `nproc`
 make -j `nproc` install DESTDIR=/build/out

cpython-unix/build.py

@@ -322,7 +322,8 @@ def materialize_clang(host_platform: str, target_triple: str):
 
 
 def build_musl(client, image, host_platform: str, target_triple: str, build_options):
-    musl = "musl-static" if "static" in build_options else "msul"
+    static = "static" in build_options
+    musl = "musl-static" if static else "msul"
     musl_archive = download_entry(musl, DOWNLOADS_PATH)
 
     with build_environment(client, image) as build_env:
@@ -337,6 +338,9 @@ def build_musl(client, image, host_platform: str, target_triple: str, build_opti
             "TOOLCHAIN": "llvm",
         }
 
+        if static:
+            env["STATIC"] = 1
+
         build_env.run("build-musl.sh", environment=env)
 
         build_env.get_tools_archive(