title: Issues building vips library from go
body: <p>I am trying to run/build a GoLang package that uses vips. When I try to compile the program I get this error:
  <code>go build gopkg.in/h2non/bimg.v1: invalid flag in pkg-config --cflags: -Xpreprocessor</code></p>
  
  <p>Here are my specs:</p>
  
  <pre><code>macOS Mojave Version 10.14.3
  vips Version 8.7.4
  go Version 1.11.5 darwin/amd64
  </code></pre>
  
  <p>I read some issues adding CGOALLOWEDFLAGS I've tried that also but no luck.</p>