#!/bin/env sh

set -eo pipefail

cc="$CC"
test -n "$cc" || cc=cc
opt="$O"
test -n "$opt" || opt=

cflags="-std=c11"
src=$(grep -o '\([_A-Za-z0-9/]\)\+\.c' < Makefile)
X() {
    echo "> $@" | ([ x"$V" == x1 ] && cat || sed -s 's/\([^ ]\+\.c \?\)\{10\}$/.../')
    $@
}
echo "== Stage 0 (compiling with $cc) =="
X $cc $cflags -o antcc0 $src
echo
echo "== Stage 1 (compiling with stage 0 output) =="
X ./antcc0 $opt $cflags -o antcc1 $src
X md5sum antcc1
echo
echo "== Stage 2 (compiling with stage 1 output) =="
X ./antcc1 $opt $cflags -o antcc2 $src
X md5sum antcc2