Difference between revisions of "ARMCompilers"

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m (2008q3 seems to work with U-Boot now)
(The ARM Compiler (formerly RVCT))
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[http://www.codesourcery.com/ CodeSourcery] [http://www.codesourcery.com/gnu_toolchains/arm/download.html '''ARM GNU/Linux''' tool chain] is the version with the support for the latest ARM architecture.  Mainline [http://gcc.gnu.org/ gcc] also has stable ARM support.  Enhancements are made in the Codesourcery version first, and are then pushed back to mainline.
 
[http://www.codesourcery.com/ CodeSourcery] [http://www.codesourcery.com/gnu_toolchains/arm/download.html '''ARM GNU/Linux''' tool chain] is the version with the support for the latest ARM architecture.  Mainline [http://gcc.gnu.org/ gcc] also has stable ARM support.  Enhancements are made in the Codesourcery version first, and are then pushed back to mainline.
  
[http://www.codesourcery.com/gnu_toolchains/arm/portal/release313 2007q3 version] is recommended.  An [http://people.mozilla.com/~vladimir/misc/cs2007q3-armel.tar.gz ARM-native version of CS2007q3 has been built] as well.  You can also install a native tool-chain from Angstrom.
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As of August 2009, [http://www.codesourcery.com/sgpp/lite/arm/portal/release858 2009q1-203 version] is recommended.  If you look for native tool chain, you can also install a native tool-chain from Angstrom. More recent versions from 2011 (such as [http://www.codesourcery.com/sgpp/lite/arm/portal/release1803 2011.03-41 version]) should work just fine as well.
  
 
Note: If you will use only [[BeagleBoardAndOpenEmbeddedGit|OpenEmbedded (OE)]] to build code for your Beagle, you don't need to download the CodeSourcery compiler. OE builds a cross-compiler from source as part of the bitbake process.
 
Note: If you will use only [[BeagleBoardAndOpenEmbeddedGit|OpenEmbedded (OE)]] to build code for your Beagle, you don't need to download the CodeSourcery compiler. OE builds a cross-compiler from source as part of the bitbake process.
  
=== Limitations===
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The [http://free-electrons.com/blog/beagle-labs/ Free Electrons] Beagle [http://free-electrons.com/doc/training/beagle/labs.pdf training material] uses [http://ymorin.is-a-geek.org/projects/crosstool Crosstool-ng].
  
Note: A user reports that he found the use of CodeSourcery tool chain version 2007q1-21 and 2008q1-126 as strange. He has been using [http://www.codesourcery.com/gnu_toolchains/arm/portal/release313 '''2007q3-51'''] for a couple of months now.
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=== Limitations===
  
 
Note: Some users report problems using Linux installer version. If installer doesn't work for you, download tar version (section ''Advanced Packages''), copy extracted ''arm-2007q3'' directory to ''/opt/codesourcery/arm-none-linux-gnueabi/'' and add ''/opt/codesourcery/arm-none-linux-gnueabi/arm-2007q3/bin'' to your path.
 
Note: Some users report problems using Linux installer version. If installer doesn't work for you, download tar version (section ''Advanced Packages''), copy extracted ''arm-2007q3'' directory to ''/opt/codesourcery/arm-none-linux-gnueabi/'' and add ''/opt/codesourcery/arm-none-linux-gnueabi/arm-2007q3/bin'' to your path.
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* Note: CodeSourcery [http://groups.google.com/group/beagleboard/msg/63163389873902c3 2007q3] has the following issues:
 
* Note: CodeSourcery [http://groups.google.com/group/beagleboard/msg/63163389873902c3 2007q3] has the following issues:
 
** Broken -Os option. There is a [http://groups.google.com/group/beagleboard/msg/d4170b16029920ee fix] (needs recompilation)
 
** Broken -Os option. There is a [http://groups.google.com/group/beagleboard/msg/d4170b16029920ee fix] (needs recompilation)
** Started to [http://marc.info/?l=linux-omap&m=123878607426122&w=2 miscompile Linux kernel] with >= ~2.6.29.
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** Started to [http://marc.info/?l=linux-omap&m=123878607426122&w=2 miscompile Linux kernel] with >= ~2.6.29 ([http://marc.info/?l=linux-omap&m=124027585911690&w=2 analysis by Richard Woodruff]) ([http://marc.info/?l=linux-omap&m=124267322526315&w=2 disabling ARM_UNWIND solves it]).
  
 
* Note: CodeSourcery [http://groups.google.com/group/beagleboard/msg/63163389873902c3? 2008q1] has the following issues:
 
* Note: CodeSourcery [http://groups.google.com/group/beagleboard/msg/63163389873902c3? 2008q1] has the following issues:
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* Note: CodeSourcery 2008q3 (now replaced by 2008q3-72) has the following issues:
 
* Note: CodeSourcery 2008q3 (now replaced by 2008q3-72) has the following issues:
 
** [http://hardwarebug.org/2008/10/11/codesourcery-gcc-2008q3-fail/ Broken NEON] support using ''-fmpu=neon -mfloat-abi=softfp -mcpu=cortex-a8 -O3''
 
** [http://hardwarebug.org/2008/10/11/codesourcery-gcc-2008q3-fail/ Broken NEON] support using ''-fmpu=neon -mfloat-abi=softfp -mcpu=cortex-a8 -O3''
** <font color="#C0C0C0">It was told to [http://www.beagleboard.org/irclogs/index.php?date=2008-10-11#T20:32:17 miscompile] U-Boot, but this can't be reproduced with recent [[BeagleBoard#U-Boot|U-Boot]].</font>
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** It was told to [http://www.beagleboard.org/irclogs/index.php?date=2008-10-11#T20:32:17 miscompile] U-Boot, but this seems to be fixed with recent [[BeagleBoard#U-Boot|U-Boot]] and 2008q3-72 below.
  
 
* Note: CodeSourcery 2008q3-72 has the following issues:
 
* Note: CodeSourcery 2008q3-72 has the following issues:
 
** See [http://hardwarebug.org/2008/11/28/codesourcery-fails-again/ small problem with vectorization].
 
** See [http://hardwarebug.org/2008/11/28/codesourcery-fails-again/ small problem with vectorization].
  
== ARM RVDS compiler ==
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* Note: CodeSourcery 2009q1 has the following issues:
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** Floating-point code can be slower than with 2007q3, see [http://hardwarebug.org/2009/08/05/arm-compiler-shoot-out/ FFmpeg benchmarks].
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== GDB debugger ==
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gdb supports native debug or 'gdbserver' remote debug.  For debug support for VFPv3 and NEON, you must use the 'gdbserver' approach - see [http://groups.google.com/group/beagleboard/browse_thread/thread/4b0e82be1e106242 How to enable VFPv3/NEON debug].
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== The ARM Compiler (formerly RVCT) ==
  
ARM has the [http://www.arm.com/products/DevTools/RVDSPro.html Realview Developer Suite], with arguably better code generation than gcc. An [http://www.arm.com/products/DevTools/RVDSEvalCD.html DVD evaluation version] is available (or download via internet by [https://silver.arm.com/login/register.tm registering] followed by [https://silver.arm.com/licensing/autoeval.tm download]).
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ARM has the [http://www.arm.com/ds5 Development Studio 5 (DS-5)], which contains the ARM reference compiler. A 30-day [http://www.arm.com/ds5 evaluation version] is available for download.
  
ARM RVDS tools can be used to generate Linux applications and shared-libraries, by following the [http://infocenter.arm.com/help/topic/com.arm.doc.dai0212a/DAI0212A_building_linux_apps_with_rvct40_and_gnu.pdf Apps Note 212 Building Linux applications using RVCT v4.0 and the GNU Tools and Libraries]
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The ARM Compiler toolchain can be used to generate Linux applications and shared-libraries and is generally highly compatible with GCC. It also bundles the industry leading vectorizing compiler for [http://www.arm.com/products/processors/technologies/neon.php ARM NEON-]enabled devices.
  
ARM RVDS can also work in [http://www.scratchbox.org/ Scratchbox], by following  [http://infocenter.arm.com/help/topic/com.arm.doc.dai0221a/DAI0221A_rvds_compiler_scratchbox.pdf Apps Note 221 RealView Development Suite 4.0 ARM Compiler for Scratchbox]
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[[Category:Compiler]]

Revision as of 12:01, 18 January 2012

This page is about compilers (toolchains) for ARM (Linux) based boards, mainly focussed to ARM Cortex A8 on BeagleBoard.

GCC compiler

Recommendations

CodeSourcery ARM GNU/Linux tool chain is the version with the support for the latest ARM architecture. Mainline gcc also has stable ARM support. Enhancements are made in the Codesourcery version first, and are then pushed back to mainline.

As of August 2009, 2009q1-203 version is recommended. If you look for native tool chain, you can also install a native tool-chain from Angstrom. More recent versions from 2011 (such as 2011.03-41 version) should work just fine as well.

Note: If you will use only OpenEmbedded (OE) to build code for your Beagle, you don't need to download the CodeSourcery compiler. OE builds a cross-compiler from source as part of the bitbake process.

The Free Electrons Beagle training material uses Crosstool-ng.

Limitations

Note: Some users report problems using Linux installer version. If installer doesn't work for you, download tar version (section Advanced Packages), copy extracted arm-2007q3 directory to /opt/codesourcery/arm-none-linux-gnueabi/ and add /opt/codesourcery/arm-none-linux-gnueabi/arm-2007q3/bin to your path.

  • Note: CodeSourcery 2008q1 has the following issues:
    • Vectorization + NEON is broken
    • building static binaries with cortex-a8 flag (or any ARMv7a core) is broken
    • some armv6 compilations end in ICE.
  • Note: CodeSourcery 2008q3 (now replaced by 2008q3-72) has the following issues:
    • Broken NEON support using -fmpu=neon -mfloat-abi=softfp -mcpu=cortex-a8 -O3
    • It was told to miscompile U-Boot, but this seems to be fixed with recent U-Boot and 2008q3-72 below.
  • Note: CodeSourcery 2009q1 has the following issues:

GDB debugger

gdb supports native debug or 'gdbserver' remote debug. For debug support for VFPv3 and NEON, you must use the 'gdbserver' approach - see How to enable VFPv3/NEON debug.

The ARM Compiler (formerly RVCT)

ARM has the Development Studio 5 (DS-5), which contains the ARM reference compiler. A 30-day evaluation version is available for download.

The ARM Compiler toolchain can be used to generate Linux applications and shared-libraries and is generally highly compatible with GCC. It also bundles the industry leading vectorizing compiler for ARM NEON-enabled devices.