, SysTools.Option "-o"
, SysTools.FileOption "" output_fn
, SysTools.Option "-shared"
- , SysTools.FileOption "-Wl,--out-implib=" (output_fn ++ ".a")
+ ] ++
+ [ SysTools.FileOption "-Wl,--out-implib=" (output_fn ++ ".a")
+ | dopt Opt_SharedImplib dflags
]
++ map (SysTools.FileOption "") o_files
++ map SysTools.Option (
| Opt_GenManifest
| Opt_EmbedManifest
| Opt_EmitExternalCore
+ | Opt_SharedImplib
-- temporary flags
| Opt_RunCPS
Opt_DoAsmMangling,
+ Opt_SharedImplib,
+
Opt_GenManifest,
Opt_EmbedManifest,
Opt_PrintBindContents
( "gen-manifest", Opt_GenManifest, const Supported ),
( "embed-manifest", Opt_EmbedManifest, const Supported ),
( "ext-core", Opt_EmitExternalCore, const Supported ),
+ ( "shared-implib", Opt_SharedImplib, const Supported ),
( "implicit-import-qualified", Opt_ImplicitImportQualified, const Supported )
]
<entry>dynamic</entry>
<entry>-</entry>
</row>
+ <row>
+ <entry><option>-no-shared-implib</option></entry>
+ <entry>Don't generate an import library for a DLL (Windows only)</entry>
+ <entry>dynamic</entry>
+ <entry>-</entry>
+ </row>
</tbody>
</tgroup>
</informaltable>
/>).</para>
</listitem>
</varlistentry>
+
+ <varlistentry>
+ <term>
+ <option>-fno-shared-implib</option>
+ <indexterm><primary><option>-fno-shared-implib</option></primary>
+ </indexterm>
+ </term>
+ <listitem>
+ <para>DLLs on Windows are typically linked to by linking to a corresponding
+ <literal>.lib</literal> or <literal>.dll.a</literal> - the so-called import library.
+ GHC will typically generate such a file for every DLL you create by compiling in
+ <literal>-shared</literal> mode. However, sometimes you don't want to pay the
+ disk-space cost of creating this import library, which can be substantial - it
+ might require as much space as the code itself, as Haskell DLLs tend to export
+ lots of symbols.</para>
+
+ <para>As long as you are happy to only be able to link to the DLL using
+ <literal>GetProcAddress</literal> and friends, you can supply the
+ <option>-fno-shared-implib</option> flag to disable the creation of the import
+ library entirely.</para>
+ </listitem>
+ </varlistentry>
</variablelist>
</sect2>