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<concept id="GUID-6C069F43-207C-5C6A-B9F6-3865BE8E70E8" xml:lang="en"><title>Variant
configuration file syntax</title><prolog><metadata><keywords/></metadata></prolog><conbody>
<section><title>Purpose</title> <p>A variant configuration file (<filepath>.var</filepath>)
defines settings that are specific to a variant. It is used to modify certain
aspects of an existing build platform. </p> </section>
<section><title>Syntax</title> <p> <varname>KEYWORD</varname> [<varname>OPERATION</varname>]
[<varname>VALUE</varname>] </p> <p>A summary of keywords, operations and values
is given below: </p> <p><b>Keyword</b> </p> <p>Possible keywords are as follows: </p> <table id="GUID-D6F58101-A22F-5377-9190-B8E609DE35ED">
<tgroup cols="2"><colspec colname="col0"/><colspec colname="col1"/>
<tbody>
<row>
<entry><p> <codeph>VARIANT</codeph> </p> </entry>
<entry><p>Indicates that <varname>VALUE</varname> is the name of the variant
configuration. </p> </entry>
</row>
<row>
<entry><p> <codeph>VIRTUAL</codeph> </p> </entry>
<entry><p>Indicates that the variant is meant only for grouping variants and
not to be used as a build configuration. </p> </entry>
</row>
<row>
<entry><p> <codeph>EXTENDS</codeph> </p> </entry>
<entry><p>Indicates that the variant extends an existing variant configuration. </p> </entry>
</row>
<row>
<entry><p> <codeph>VARIANT_HRH</codeph> </p> </entry>
<entry><p>Specifies the pre-included header (<filepath>.hrh</filepath>) file
that defines feature macros. </p> </entry>
</row>
<row>
<entry><p> <codeph>BUILD_INCLUDE</codeph> </p> </entry>
<entry><p>Specifies the location of the files to be included when building
the binary. </p> </entry>
</row>
<row>
<entry><p> <codeph>ROM_INCLUDE</codeph> </p> </entry>
<entry><p>Specifies the location of the files to be included when building
the ROM image containing the variant binary. </p> </entry>
</row>
</tbody>
</tgroup>
</table> <p> <b>Note</b>: If VARIANT_HRH keyword is not present, then <codeph>/epoc32/include/variant/name.hrh</codeph> is
used. </p> <p><b>operation</b> </p> <p>The possible operations are <codeph>set</codeph>, <codeph>append</codeph> and <codeph>prepend</codeph>.
These operations provide the flexibility of extending the existing include
paths within the <filepath>.var</filepath> file. The operations are applicable
only to the <codeph>BUILD_INCLUDE</codeph> and <codeph>ROM_INCLUDE</codeph> keywords. </p> <p> <b>Example</b> </p> <codeblock id="GUID-3D6B0229-A64F-52BB-9BDF-10ABDF99F11E" xml:space="preserve"># default.var
VARIANT default
BUILD_INCLUDE set /epoc32/include
BUILD_INCLUDE append /epoc32/include/variant
ROM_INCLUDE set /epoc32/rom/include</codeblock> <codeblock id="GUID-91F8392C-C822-5829-BA42-FB8F9AB6AECD" xml:space="preserve"># phone.var
VARIANT phone
EXTENDS default
BUILD_INCLUDE append /epoc32/include/variant/phone
ROM_INCLUDE prepend /epoc32/rom/phone</codeblock> <p>For the variant <codeph>phone</codeph> the
include lists will be: </p> <codeblock id="GUID-72B415A7-84D6-5818-9E64-B736D505E873" xml:space="preserve">BUILD (/epoc32/include, /epoc32/include/variant, /epoc32/include/variant/phone)
ROM (/epoc32/rom/phone, /epoc32/rom/include)</codeblock> <p><b>value</b> </p><p>Value
can be a variant name, a file name or a directory name. for example, myphone
or /epoc32/tools/variant/name.var. </p><ul>
<li><p>Use '/' as the path separator between files and directories.</p></li>
<li><p>Begin all paths with '/' implying that they are relative to EPOCROOT.</p></li>
</ul> <p><b>Example</b> </p> <p>An example of a variant: </p> <codeblock id="GUID-50190D57-7C49-5697-A858-7626D59B1967-GENID-1-11-1-1-7-1-11-1-2-2-20" xml:space="preserve">VARIANT name
VIRTUAL
EXTENDS parent
VARIANT_HRH /epoc32/include/variant/something.hrh
BUILD_INCLUDE set directoryA
BUILD_INCLUDE append directoryB
BUILD_INCLUDE prepend directoryC
ROM_INCLUDE set directoryD
ROM_INCLUDE append directoryE
ROM_INCLUDE prepend directoryF
</codeblock> <p><b>Notes</b> </p> <ul>
<li id="GUID-84B8E804-46B8-5422-9CFE-048C9EF0179B-GENID-1-11-1-1-7-1-11-1-2-2-22-1"><p>All <filepath>.var</filepath> files
must exist in <filepath>/epoc32/tools</filepath> <filepath>/</filepath> <varname>variant</varname>. </p> </li>
<li id="GUID-CDB78FAD-58A6-5464-ACC6-EFBCEDFD5092-GENID-1-11-1-1-7-1-11-1-2-2-22-2"><p>A default variant configuration
file (<filepath>default.var</filepath>) must exist in <filepath>/epoc32/tools/variant/</filepath>. </p> </li>
<li id="GUID-7216C624-7E28-52A5-BAA7-BB897286AE51-GENID-1-11-1-1-7-1-11-1-2-2-22-3"><p>The name of the variant
configuration file (.var) must be same as the variant name. For example, if
the variant name is <b>myvar</b>, then the variant configuration file must
be named as <filepath>myvar.var</filepath>. </p> </li>
<li id="GUID-CADF1047-C92E-5A8C-81FB-64CAA19380B8-GENID-1-11-1-1-7-1-11-1-2-2-22-4"><p>Each variant must have
a default <filepath><variant_name>.hrh</filepath> file at <filepath>/epoc32/include/variant/</filepath>.
If you want to use any other <filepath>.hrh</filepath> file under EPOCROOT,
use the <codeph>VARIANT_HRH</codeph> keyword to specify its name along with
the relative path. </p> </li>
<li id="GUID-FEEDF642-117E-5E4F-8CD4-B6305B977204-GENID-1-11-1-1-7-1-11-1-2-2-22-5"><p>A default variant cannot
be <codeph>VIRTUAL</codeph>. </p> </li>
</ul> </section>
<section><title>Example</title> <p>An example of a variant: </p> <codeblock id="GUID-50190D57-7C49-5697-A858-7626D59B1967-GENID-1-11-1-1-7-1-11-1-2-3-3" xml:space="preserve">VARIANT name
VIRTUAL
EXTENDS parent
VARIANT_HRH /epoc32/include/variant/something.hrh
BUILD_INCLUDE set directoryA
BUILD_INCLUDE append directoryB
BUILD_INCLUDE prepend directoryC
ROM_INCLUDE set directoryD
ROM_INCLUDE append directoryE
ROM_INCLUDE prepend directoryF
</codeblock> </section>
<section><title>Notes</title> <ul>
<li id="GUID-84B8E804-46B8-5422-9CFE-048C9EF0179B-GENID-1-11-1-1-7-1-11-1-2-4-2-1"><p>All <filepath>.var</filepath> files
must exist in <filepath>/epoc32/tools</filepath> <filepath>/</filepath> <varname>variant</varname>. </p> </li>
<li id="GUID-CDB78FAD-58A6-5464-ACC6-EFBCEDFD5092-GENID-1-11-1-1-7-1-11-1-2-4-2-2"><p>A default variant configuration
file (<filepath>default.var</filepath>) must exist in <filepath>/epoc32/tools/variant/</filepath>. </p> </li>
<li id="GUID-7216C624-7E28-52A5-BAA7-BB897286AE51-GENID-1-11-1-1-7-1-11-1-2-4-2-3"><p>The name of the variant
configuration file (.var) must be same as the variant name. For example, if
the variant name is <b>myvar</b>, then the variant configuration file must
be named as <filepath>myvar.var</filepath>. </p> </li>
<li id="GUID-CADF1047-C92E-5A8C-81FB-64CAA19380B8-GENID-1-11-1-1-7-1-11-1-2-4-2-4"><p>Each variant must have
a default <filepath><variant_name>.hrh</filepath> file at <filepath>/epoc32/include/variant/</filepath>.
If you want to use any other <filepath>.hrh</filepath> file under EPOCROOT,
use the <codeph>VARIANT_HRH</codeph> keyword to specify its name along with
the relative path. </p> </li>
<li id="GUID-FEEDF642-117E-5E4F-8CD4-B6305B977204-GENID-1-11-1-1-7-1-11-1-2-4-2-5"><p>A default variant cannot
be <codeph>VIRTUAL</codeph>. </p> </li>
</ul></section>
</conbody><related-links>
<link href="GUID-917413FC-0AC0-5768-B5AD-36BD2EDCB1FF.dita"><linktext>How to build
feature based variants</linktext></link>
<link href="GUID-7FF363B0-B05F-5490-8D9C-59061B905381.dita"><linktext>How to build
ROMs with variants</linktext></link>
</related-links></concept>