<varlistentry>
<term>
+ <option>-rtsopts</option>
+ <indexterm><primary><option>-rtsopts</option></primary></indexterm>
+ </term>
+ <listitem>
+ <para>
+ This option affects the processing of RTS control options given either
+ on the command line or via the <envar>GHCRTS</envar> environment variable.
+ There are three possibilities:
+ </para>
+ <itemizedlist>
+ <listitem>
+ <option>-rtsopts=none</option> disables all processing of RTS options.
+ Passing <option>+RTS</option> anywhere on the command line causes the program
+ to abort with an error message. Setting the <envar>GHCRTS</envar> environment
+ variable causes a warning is printed before the main Haskell program runs.
+ </listitem>
+ <listitem>
+ <option>-rtsopts=some</option> enables only the "safe" RTS options on the
+ command line. (Currently only <option>-?</option> and <option>--info</option>.)
+ Any other RTS options on the command line abort the program with an error
+ message. All RTS options in the <envar>GHCRTS</envar> environment variable are
+ processed as normal. This is the default setting.
+ </listitem>
+ <listitem>
+ <option>-rtsopts=all</option> (or just <option>-rtsopts</option>) enables
+ <emphasis>all</emphasis> RTS option processing, both on the command line and
+ through the <envar>GHCRTS</envar> environment variable.
+ </listitem>
+ </itemizedlist>
+ <para>
+ Prior to GHC 7.0, the default was to process all RTS options. However, since
+ RTS options can be used to write logging data to arbitrary files under the
+ security context of the running program, there is a potential security problem.
+ For this reason, GHC 7.0 defaults to <option>-rtsops=some</option>.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>
+ <option>-with-rtsopts</option>
+ <indexterm><primary><option>-with-rtsopts</option></primary></indexterm>
+ </term>
+ <listitem>
+ <para>
+ This option allows you to set the default RTS options at link-time. For example,
+ <option>-with-rtsopts="-H128m"</option> sets the default heap size to 128MB.
+ This will now always be the default heap size, unless the user overrides it.
+ (Depending on the setting of the <option>-rtsopts</option> option, the user might
+ not have the ability to change RTS options at run-time, in which case
+ <option>-with-rtsopts</option> would be the <emphasis>only</emphasis> way to set
+ them.)
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>
<option>-fno-gen-manifest</option>
<indexterm><primary><option>-fno-gen-manifest</option></primary>
</indexterm>