From e84e2fb4342c9db9c38d3e22913385d576b84efe Mon Sep 17 00:00:00 2001
From: Florian Klink <flokli@flokli.de>
Date: Fri, 17 Aug 2018 16:35:01 +0200
Subject: [PATCH] docs: explain the home passthru present in all JDKs and
 setting JAVA_HOME where required

---
 doc/languages-frameworks/java.xml | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/doc/languages-frameworks/java.xml b/doc/languages-frameworks/java.xml
index 06812d2df23..1acea6a7547 100644
--- a/doc/languages-frameworks/java.xml
+++ b/doc/languages-frameworks/java.xml
@@ -61,7 +61,18 @@ installPhase =
   <literal>${jre}/bin/java</literal> instead of
   <literal>${jdk}/bin/java</literal>, you prevent your package from depending
   on the JDK at runtime.
- </para>
+</para>
+
+<para>
+  Note all JDKs passthru <literal>home</literal>, so if your application
+  requires environment variables like <envar>JAVA_HOME</envar> being set, that
+  can be done in a generic fashion with the <literal>--set</literal> argument
+  of <literal>makeWrapper</literal>:
+
+<programlisting>
+  --set JAVA_HOME ${jdk.home}
+</programlisting>
+</para>
 
  <para>
   It is possible to use a different Java compiler than <command>javac</command>