<sect3>
<title>Cross-compiling to produce an unregisterised GHC</title>
+ <para>NOTE! These instructions apply to GHC 6.4 and (hopefully)
+ later. If you need instructions for an earlier version of GHC, try
+ to get hold of the version of this document that was current at the
+ time. It should be available from the appropriate download page on
+ the <ulink
+ url="http://www.haskell.org/ghc/">GHC homepage</ulink>.</para>
+
<para>In this section, we explain how to bootstrap GHC on a
new platform, using unregisterised intermediate C files. We
haven't put a great deal of effort into automating this
<listitem>
<screen>$ cd <replaceable>T</replaceable>/ghc/includes
-$ make config.h</screen>
+$ make ghcconfig.h</screen>
</listitem>
</itemizedlist>
</listitem>
with the following contents:</para>
<programlisting>GhcUnregisterised = YES
-GhcLibHcOpts = -O -H32m -keep-hc-files
+GhcLibHcOpts = -O -fvia-C -keep-hc-files
GhcLibWays =
SplitObjs = NO
GhcWithNativeCodeGen = NO
GhcWithInterpreter = NO
-GhcStage1HcOpts = -O -H32m -fasm
+GhcStage1HcOpts = -O -fasm
GhcStage2HcOpts = -O -fvia-C -keep-hc-files</programlisting>
+SRC_HC_OPTS += -H32m
+GhcBootLibs = YES
</listitem>
<listitem>
<listitem>
<para>Copy
- <filename><replaceable>T</replaceable>/ghc/includes/config.h</filename>
+ <filename><replaceable>T</replaceable>/ghc/includes/ghcconfig.h</filename>
to
<filename><replaceable>H</replaceable>/ghc/includes</filename>.
Note that we are building on the host machine, using the
</listitem>
<listitem>
- <para>Touch <literal>config.h</literal>, just to make
+ <para>Touch <literal>ghcconfig.h</literal>, just to make
sure it doesn't get replaced during the build:</para>
-<screen>$ touch <replaceable>H</replaceable>/ghc/includes/config.h</screen>
+<screen>$ touch <replaceable>H</replaceable>/ghc/includes/ghcconfig.h</screen>
</listitem>
<listitem>
</listitem>
<listitem>
-<screen>$ cd <replaceable>H</replaceable>/ghc
+<screen>$ cd <replaceable>H</replaceable>/ghc/compiler
$ make boot stage=2 && make stage=2</screen>
</listitem>
-
+
<listitem>
<screen>$ cd <replaceable>H</replaceable>/ghc/utils
$ make clean
</para>
</sect3>
+<sect3><title>Crippled <command>ld</command></title>
+
+<para>
+It turns out that on both Cygwin and MSYS, the <command>ld</command> has a
+limit of 32kbytes on its command line. Especially when using split object
+files, the make system can emit calls to <command>ld</command> with thousands
+of files on it. Then you may see something like this:
+<programlisting>
+(cd Graphics/Rendering/OpenGL/GL/QueryUtils_split && /mingw/bin/ld -r -x -o ../QueryUtils.o *.o)
+/bin/sh: /mingw/bin/ld: Invalid argument
+</programlisting>
+The solution is either to switch off object file splitting (set
+<option>SplitObjs</option> to <literal>NO</literal> in your
+<filename>build.mk</filename>),
+or to make the module smaller.
+</para>
+</sect3>
+
<sect3><title>Host System vs Target System</title>
<para>