author | Dominic Pinkman <Dominic.Pinkman@Nokia.com> |
Fri, 22 Jan 2010 18:26:19 +0000 | |
changeset 1 | 25a17d01db0c |
child 3 | 46218c8b8afa |
permissions | -rw-r--r-- |
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<?xml version="1.0" encoding="utf-8"?> |
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<!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. --> |
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<!-- This component and the accompanying materials are made available under the terms of the License |
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"Eclipse Public License v1.0" which accompanies this distribution, |
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and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". --> |
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<!-- Initial Contributors: |
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Nokia Corporation - initial contribution. |
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Contributors: |
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--> |
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<!DOCTYPE concept |
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PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd"> |
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<concept id="GUID-5B442231-6E71-5F35-A27E-B14AEC2FC105" xml:lang="en"><title>ARMV5 |
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build customisation</title><prolog><metadata><keywords/></metadata></prolog><conbody> |
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<p>The ARMV5 build supports the notion of customisation. This allows a programmer |
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to define a new build target that is derived from the ARMV5 build. A new build |
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target is defined via a <filepath>.BSF</filepath> file. The build system becomes |
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aware of a customised build by the presence of its .BSF file in <filepath>epoc32\tools\</filepath>. |
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Such customisations are referred to by the name of their <filepath>.BSF</filepath> file: |
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e.g. the file <filepath>XScale.bsf</filepath> defines the build target <codeph>XScale</codeph>. |
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This name can be used in exactly the same way as built-in names such as ARMV5. </p> |
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<section><title>BSF Syntax </title><p>It is intended that the syntax of a |
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.BSF file is toolchain specific with the exception of the obligatory header:</p><codeblock id="GUID-3CF96A81-8710-5044-8AF0-A9D568822045" xml:space="preserve">#<BSF># : token to identify this as a BSF file must appear at start of first line. |
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CUSTOMIZES build : identitifies which build is customized by this spec e.g. ARMV5.</codeblock><p>Currently, |
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only ARMV5 can be customised. The ARMV5 specific .BSF syntax is as follows:</p><codeblock id="GUID-6E4208DE-3B44-5055-8DF5-943210B83779" xml:space="preserve">THUMB_OPTIONS opt1 opt2 ... : compiler options used by default for user side code (expected to be THUMB mode) |
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ARM_OPTIONS opt1 opt2 ... : compiler options used when BUILD_AS_ARM etc are specified (expected to be ARM mode) |
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KERNEL_OPTIONS opt1 opt2 ... : compiler options used to compile kernel side code |
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COMMON_OPTIONS opt1 opt2 ... : compiler options that are added to all the above</codeblock><p>The |
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above four keywords specify compiler options that can be overriden in an MMP |
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file through<codeph>OPTION</codeph>. For example: </p><codeblock id="GUID-EDE9A728-34C2-546F-B93D-77B8CD8BFA0D" xml:space="preserve">OPTION ARMCC -Ospace</codeblock><p>A final keyword specifies the system-wide options that cannot be overridden |
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in an MMP file via <codeph>OPTION</codeph>. Typically, these specify options |
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within the EABI e.g. the SOFTVFP calling convention. They are called invariant |
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since code compiled with different settings will not be binary compatible.</p><codeblock id="GUID-B6AB5699-2C5A-5B39-83B2-56ED9976D5B9" xml:space="preserve">INVARIANT_OPTIONS opt opt2 ... : these options are appended to all compiler command lines</codeblock></section> |
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<example><p>The following is an example bsf file: </p><codeblock id="GUID-9CDC9BA6-9A59-55F7-8950-184DF26BF10D" xml:space="preserve">#<bsf># |
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# Example build specialization file |
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# |
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# NB currently specialization only applies to ARMV5 build using RVCT. |
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# This file customizes the default ARMV5. It specifies a build that |
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# always uses optimization level O1 rather than the default O2. |
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customizes ARMV5 |
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# The following options that can be overridden by MMP files |
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# Use these options when compiling user-side THUMB code |
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thumb_options -thumb -O1 |
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# Use these options when compiling user-side ARM code |
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arm_options -arm -O1 |
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# Use these options when compiling Kernel code |
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kernel_options -arm -O1 |
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# This just factors out common (contingent) options from the above. |
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# These options can also be overridden by MMP files. |
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common_options --diag_suppress 1,161,654,1135,1152,1300 --diag_error 1267 |
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# Fixed options for this build. These options should only be changed with great care since |
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# they have the potential to introduce incompatible ABI (or machine) level effects. |
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# -cpu 5T - this build just targets a generic 5T |
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# -Ono_known_library - we use our own library so tell the compiler not to make assumptions about its implementation |
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# -fpu softvfp - some system code explicitly assumes this variant of the EABI (softvfp+vfp could be used on say XScale) |
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# --dll_vtbl - this switches on class exporting and is needed to support Symbian platform DLL model |
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# -apcs /inter - redundant on 5T, but worth saying anyway |
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invariant_options -cpu 5T -fy -Ono_known_library -fpu softvfp --dll_vtbl -apcs /inter</codeblock></example> |
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</conbody></concept> |