#!/bin/sh -e

cd debian

pkgs=$(grep-dctrl -sPackage -n -FSection libdevel control)

for p in $pkgs; do
    includes="$includes -I $p/usr/include"
done

for pkg in $pkgs; do
  {
    printf 'header:Depends='
    for header in $(find "$pkg" -name "*.h"); do
        gcc -MM -MT '' -E $includes $header
    done | sed "s|^:||;s|^ *||;\|^$pkg/|d;s|/.*| (= \${binary:Version}),|" | sort -u | tr '\n' ' '
    printf '\n'
  } >>"$pkg.substvars"
done