Re: [Ltib] How to specify locations for libs & executables

[Stuart Hughes]

Hi Todd,

It's okay to put stuff in /usr/local/...
The only worry is if other people install there, it could clobber your
stuff.  Also you'd need to track your own files in case you want to
remove/upgrade your package.

You don't really need to read the RPM book.  By using the template spec
file in LTIB as a guide (or one of the others) packaging using rpm is
simple for simple packages (that is you don't need to read the whole
book, just copy and interpolate one of LTIB's simple .spec files).

I'm not sure what the question about /var relates to?

Regards, Stuart

address@hidden wrote:
> Thanks Stuart,
> Before you answered, I put my stuff in /usr/local/(lib, bin).  There was
> nothing in this location and it was already on the path.  Would it be a
> mistake to leave my stuff there?  Right now, /var is set to be in RAM.
> 
> Sorry, not really an LTIB question per se, but I appreciate your advice.
> 
> I suppose I need to read an RPM book to see what I'm missing as far as
> package management.
> 
> ----- Original Message -----
> From: "Stuart Hughes" <address@hidden>
> To: address@hidden
> Cc: "ltib" <address@hidden>
> Sent: Saturday, September 18, 2010 10:26:03 AM
> Subject: Re: [Ltib] How to specify locations for libs & executables
> 
> Hi Todd,
> 
> Your workflow is okay, except you're missing some kind of package
> management if you want to easily be able to replace your own stuff.
> 
> Apple is not a Linux platform, so it's not fair to try to equate how
> they manage content.  Even Android does thing a completely separate way.
> 
> For Linux (LSB) put your stuff in /opt/_vendor_/{lib,bin}.  However this
> will only get you so far unless you use some kind of package management
> system.
> 
> Regards, Stuart
> 
> 
> address@hidden wrote:
>> Maybe I'm not doing things correctly but I'm *not *running 'my stuff'
>> through LTIB.  I add my stuff *after *LTIB finishes.  My flow goes like
>> this:
>>
>>    1. ./ltib -c
>>    2. Define everything in LTIB.
>>    3. LTIB produces a root file system on my host
>>    4. My target NFS mounts the root file system on my host and uses it
>>       for it's root file system
>>
>> Now, I'm finished with LTIB unless I need to change some Linux commands,
>> etc.
>>
>>    1. Use Eclipse to manage C/C++ source files, compile, link, etc
>>    2. Use Eclipse to install my drivers, libraries, & executables into
>>       rootfs. (my stuff)
>>    3. Run my executables in the target via ssh, (Dropbear).
>>    4. Go back to step 1, (in this group, not ltib), to edit and make
> fixes.
>>
>>    1. When My executables are all checked out, I use LTIB to
>>       create rootfs.jffs2. This now includes my executables and
>>       libraries, etc.
>>    2. Flash the target.
>>
>> Is the above flow reasonable?  Maybe all I need to change is installing
>> my stuff in /opt/lib and opt/bin to keep it separate from the Linux
>> stuff.  Would Apple put the executable that makes their box an iPhone in
>> /opt/bin/iPhoneApp and /opt/lib/iPhoneLib.so?
>>
>> Thanks for your patience...
>> todd
>>
>> ----- Original Message -----
>> From: "Stuart Hughes" <address@hidden>
>> To: address@hidden
>> Cc: "ltib" <address@hidden>
>> Sent: Tuesday, September 14, 2010 3:38:23 PM
>> Subject: Re: [Ltib] How to specify locations for libs & executables
>>
>> Hi Todd,
>>
>> You can replace your stuff, that's what RPM package management does for
>> you.  Simply re-build with the debug switch off.
>>
>> BTW: vendor stuff should go into /opt/
>>
>> Regards, Stuart
>>
>> address@hidden wrote:
>>> I'd like to have a place to install my shared libraries and executables
>>> *after* LTIB is finished doing it's thing.  I would like a clean place
>>> like /usr/lib & /usr/bin to be left for my stuff.
>>>
>>> The way it is now, LTIB puts busybox stuff in /usr/lib,  /bin,
>>>  /usr/bin,  & /usr/sbin.  The problem is that if I don't have a clean
>>> place for my own stuff, it's difficult to do a 'clean'.  For example, if
>>> I have installed debug versions of my code, and now I want to get rid of
>>> it and only have the release versions installed, it's hard to delete it
>>> with all the busybox & other system stuff installed in the same place.
>>>
>>> Can I tell LTIB to just use /lib & /bin?  
>>>
>>> I'd appreciate any philosophy/advice from others that have already
>>> solved this problem.
>>>
>>>
>>>
>>> Also, I notice that /lib has libm-2.5.so & libm.so.6.  /usr/lib has
>>> libm.so.  I'm trying to make everything fit into my Flash.  Anybody know
>>> why I have 3 versions of libm?
>>>
>>> I'm running ltib 10.1.1 ($Revision: 1.68 $) on Ubuntu 10.04, targeting
>>> Freescale MPC5200, Linux version 2.6.26.3-rt3 (gcc version 4.1.2) #2
>>> PREEMPT RT
>>>
>>> Thanks!
>>> todd
>>>
>>>
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>>>
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>>>
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>>
>>
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