Path and compile musl libc into kernel

toolchain/build-musl.sh

@@ -0,0 +1,26 @@
+#!/bin/sh -e
+
+target=x86_64-elf
+SYSROOT=/opt/sysroot
+
+# Pull or update musl libc
+mkdir -p /opt/external && cd /opt/external
+[ -d musl ] || git clone --depth=1 git://git.musl-libc.org/musl
+cd musl
+git reset --hard
+git pull
+
+[ -d /opt/src/patch-musl ] && rsync -a /opt/src/patch-musl/ /opt/external/musl/
+
+mkdir -p /opt/external/build-musl && cd /opt/external/build-musl
+rm -r *
+../musl/configure \
+    --target=${target} \
+    --prefix=${SYSROOT}/usr \
+    --disable-shared \
+    --enable-debug \
+    CFLAGS="-O0 -mcmodel=large"
+
+make
+make install-headers
+make install