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<a name="dist.readme"></a>4.�README</h1></div></div></div>
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������ 
Release�notes�for�Valgrind 
~~~~~~~~~~~~~~~~~~~~~~~~~~ 
If�you�are�building�a�binary�package�of�Valgrind�for�distribution, 
please�read�README_PACKAGERS.��It�contains�some�important�information. 
 
If�you�are�developing�Valgrind,�please�read�README_DEVELOPERS.��It�contains 
some�useful�information. 
 
For�instructions�on�how�to�build/install,�see�the�end�of�this�file. 
 
If�you�have�problems,�consult�the�FAQ�to�see�if�there�are�workarounds. 
 
 
Executive�Summary 
~~~~~~~~~~~~~~~~~ 
Valgrind�is�a�framework�for�building�dynamic�analysis�tools.�There�are 
Valgrind�tools�that�can�automatically�detect�many�memory�management 
and�threading�bugs,�and�profile�your�programs�in�detail.�You�can�also 
use�Valgrind�to�build�new�tools. 
 
The�Valgrind�distribution�currently�includes�six�production-quality 
tools:�a�memory�error�detector,�two�thread�error�detectors,�a�cache 
and�branch-prediction�profiler,�a�call-graph�generating�cache�abd 
branch-prediction�profiler,�and�a�heap�profiler.�It�also�includes 
three�experimental�tools:�a�heap/stack/global�array�overrun�detector, 
a�different�kind�of�heap�profiler,�and�a�SimPoint�basic�block�vector 
generator. 
 
Valgrind�is�closely�tied�to�details�of�the�CPU,�operating�system�and�to 
a�lesser�extent,�compiler�and�basic�C�libraries.�This�makes�it�difficult 
to�make�it�portable.��Nonetheless,�it�is�available�for�the�following 
platforms:� 
 
-�X86/Linux 
-�AMD64/Linux 
-�PPC32/Linux 
-�PPC64/Linux 
-�ARM/Linux 
-�x86/MacOSX 
-�AMD64/MacOSX 
-�S390X/Linux 
-�MIPS32/Linux 
-�MIPS64/Linux 
-�X86/Solaris 
-�AMD64/Solaris 
 
Note�that�AMD64�is�just�another�name�for�x86_64,�and�Valgrind�runs�fine 
on�Intel�processors.��Also�note�that�the�core�of�MacOSX�is�called 
"Darwin"�and�this�name�is�used�sometimes. 
 
Valgrind�is�licensed�under�the�GNU�General�Public�License,�version�2.� 
Read�the�file�COPYING�in�the�source�distribution�for�details. 
 
However:�if�you�contribute�code,�you�need�to�make�it�available�as�GPL 
version�2�or�later,�and�not�2-only. 
 
 
Documentation 
~~~~~~~~~~~~~ 
A�comprehensive�user�guide�is�supplied.��Point�your�browser�at 
$PREFIX/share/doc/valgrind/manual.html,�where�$PREFIX�is�whatever�you 
specified�with�--prefix=�when�building. 
 
 
Building�and�installing�it 
~~~~~~~~~~~~~~~~~~~~~~~~~~ 
To�install�from�the�Subversion�repository�: 
 
��0.�Check�out�the�code�from�SVN,�following�the�instructions�at 
�����http://www.valgrind.org/downloads/repository.html. 
 
��1.�cd�into�the�source�directory. 
 
��2.�Run�./autogen.sh�to�setup�the�environment�(you�need�the�standard 
�����autoconf�tools�to�do�so). 
 
��3.�Continue�with�the�following�instructions... 
 
To�install�from�a�tar.bz2�distribution: 
 
��4.�Run�./configure,�with�some�options�if�you�wish.��The�only�interesting 
�����one�is�the�usual�--prefix=/where/you/want/it/installed. 
 
��5.�Run�"make". 
 
��6.�Run�"make�install",�possibly�as�root�if�the�destination�permissions 
�����require�that. 
 
��7.�See�if�it�works.��Try�"valgrind�ls�-l".��Either�this�works,�or�it 
�����bombs�out�with�some�complaint.��In�that�case,�please�let�us�know 
�����(see�www.valgrind.org). 
 
Important!��Do�not�move�the�valgrind�installation�into�a�place 
different�from�that�specified�by�--prefix�at�build�time.��This�will 
cause�things�to�break�in�subtle�ways,�mostly�when�Valgrind�handles 
fork/exec�calls. 
 
 
The�Valgrind�Developers 
 
����</div>
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