157 lines
6.9 KiB
HTML
157 lines
6.9 KiB
HTML
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml"><head>
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<title>.</title>
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<style type="text/css">
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* { color: #000; background: #fff; max-width: 700px; }
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tt, pre { background: #dedede; color: #111; font-family: monospace;
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box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
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</style>
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</head><body>
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<p><span class="h1">Customizing the Build</span>
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<br/><br/>
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While a simple <span class="tt">make</span> will suffice for building Retro, there
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are a number of ways to customize the build to your needs.
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<br/><br/>
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In this chapter, replace <span class="tt">Makefile</span> with <span class="tt">GNUmakefile</span> if you
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are using GNU Make (most Linux and macOS users will probably
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be using this).
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<br/><br/>
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<span class="h2">I/O Devices</span>
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<br/><br/>
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Many of the I/O devices are optional. The most common ones are
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enabled by default in the Makefile. Look near the end of the top
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section for lines starting with <span class="tt">ENABLED</span>:
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<br/><br/>
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<tt class='indentedcode'>ENABLED ?=</tt>
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<tt class='indentedcode'>ENABLED += -DENABLE_FLOATS</tt>
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<tt class='indentedcode'>ENABLED += -DENABLE_FILES</tt>
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<tt class='indentedcode'>ENABLED += -DENABLE_UNIX</tt>
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<tt class='indentedcode'>ENABLED += -DENABLE_RNG</tt>
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<tt class='indentedcode'>ENABLED += -DENABLE_CLOCK</tt>
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<tt class='indentedcode'>ENABLED += -DENABLE_SCRIPTING</tt>
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<tt class='indentedcode'>ENABLED += -DENABLE_SIGNALS</tt>
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<tt class='indentedcode'># ENABLED += -DENABLE_SOCKETS</tt>
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<tt class='indentedcode'># ENABLED += -DENABLE_MULTICORE</tt>
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<tt class='indentedcode'>ENABLED += -DENABLE_FFI</tt>
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<br/><br/>
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Lines starting with a <span class="tt">#</span> are commented out and will not be
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processed when building. Here you can easily enable or disable
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specific devices in the VM.
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<br/><br/>
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You should also remove any disabled devices from the <span class="tt">DEVICES ?=</span>
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lines if you want to exclude the Forth part of them from the image.
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<br/><br/>
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Note: on platforms (like Linux) that lack the <span class="tt">strl*</span> functions
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from libc, make sure the <span class="tt">ENABLED += -DNEEDS_STRL</span> is not commented
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out.
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<br/><br/>
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If you want to build with sockets support, uncomment the
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<span class="tt"># ENABLED += -DENABLE_SOCKETS</span> and <span class="tt">DEVICES += interface/sockets.retro</span>
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lines before building.
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<br/><br/>
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<span class="h2">Compiler Flags</span>
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<br/><br/>
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You may need or want to adjust the compiler flags. In the first
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section of the <span class="tt">Makefile</span>, look for <span class="tt">CFLAGS</span> and add/change as
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desired to override the defaults.
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<br/><br/>
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<span class="h2">VM Tweaks</span>
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<br/><br/>
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<span class="h3">64-Bit</span>
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<br/><br/>
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A standard Retro system uses a 32-bit word size. You can increase
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this to 64-bit though. For a one-off build:
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<br/><br/>
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<tt class='indentedcode'>make OPTIONS=-DBIT64</tt>
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<br/><br/>
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<span class="h3">Stack Size</span>
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<br/><br/>
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You can alter the stack sizes by defining <span class="tt">STACK_DEPTH</span> and
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<span class="tt">ADDRESSES</span>. For a one-off build with a max stack depth of 4000
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items and 500 addresses on the return stack:
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<br/><br/>
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<tt class='indentedcode'>make OPTIONS="-DSTACK_DEPTH=4000 -DADDRESSES=500</tt>
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<br/><br/>
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<span class="h3">Image Size</span>
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<br/><br/>
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You can also alter the image size. Again, for a one-off build:
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<br/><br/>
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<tt class='indentedcode'>make OPTIONS=-DIMAGE_SIZE=4000000</tt>
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<br/><br/>
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Would build a system with a maximum image size of 4,000,000 cells.
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<br/><br/>
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<span class="h3">Update the Makefile</span>
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<br/><br/>
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If you do any of these routinely, edit the Makefile to include them.
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<br/><br/>
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<tt class='indentedcode'>OPTIONS ?=</tt>
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<tt class='indentedcode'>OPTIONS += -DBIT64</tt>
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<tt class='indentedcode'>OPTIONS += -DSTACK_DEPTH=4000</tt>
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<tt class='indentedcode'>OPTIONS += -DADDRESSES=500</tt>
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<tt class='indentedcode'>OPTIONS += -DIMAGE_SIZE=4000000</tt>
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<br/><br/>
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<span class="h2">Further Image Customization</span>
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<br/><br/>
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You can customize the image further by having the build process
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include your code in the image.
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<br/><br/>
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In the top level directory is a <span class="tt">package</span> directory containing
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a file named <span class="tt">list.forth</span>. You can add files to compile into
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your system by adding them to the <span class="tt">list.forth</span> and rebuilding.
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<br/><br/>
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Example:
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<br/><br/>
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If you have wanted to include the <span class="tt">NumbersWithoutPrefixes.forth</span>
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example, add:
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<br/><br/>
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<tt class='indentedcode'>~~~</tt>
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<tt class='indentedcode'>'example/NumbersWithoutPrefixes.forth include</tt>
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<tt class='indentedcode'>~~~</tt>
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<br/><br/>
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To the start of the <span class="tt">list.forth</span> file and then run <span class="tt">make</span> again.
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<br/><br/>
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If you have an existing Retro build and want to have the system
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handle loading extensions with less manual intervention by putting
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the source files in <span class="tt">package/extensions</span> and running
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<span class="tt">make update-extensions</span>
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<br/><br/>
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After rebuilding, the newly built <span class="tt">bin/retro</span> will now include
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your additions.
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</p>
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</body></html>
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