Misc tweaks (#387)

samples/socket/build.sh

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+
+PATH=../../dist/bin:../../bin:$PATH
+DIR=.
+
+if [ x$TARGET == x ]; then
+case "$OSTYPE" in
+  darwin*)  TARGET=macbook ;;
+  linux*)   TARGET=linux ;;
+  *)        echo "unknown: $OSTYPE" && exit 1;;
+esac
+fi
+
+var=CFLAGS_${TARGET}
+CFLAGS=${!var}
+var=LINKER_ARGS_${TARGET}
+LINKER_ARGS=${!var}
+var=COMPILER_ARGS_${TARGET}
+COMPILER_ARGS=${!var} # add -opt for an optimized build.
+
+interop -def:$DIR/sockets.def -copt:"$CFLAGS" -target:$TARGET || exit 1
+konanc $COMPILER_ARGS -target $TARGET $DIR/EchoServer.kt sockets -nativelibrary socketsstubs.bc -o EchoServer.kexe || exit 1