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Date:	Wed, 18 Apr 2012 21:13:20 +0800
From:	De-Jian Zhao <dejian DOT zhao AT gmail DOT com>
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To:	Linda Walsh <cygwin AT tlinx DOT org>
CC:	"cygwin AT cygwin DOT com" <cygwin AT cygwin DOT com>
Subject:	Re: Can RPM packages be installed into Cygwin?
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On 2012-4-17 13:58, Linda Walsh wrote:
> De-Jian Zhao wrote:
>
>> Dear all,
>>
>> I noticed that there is a command - rpm - under Cygwin 1.7. Does that 
>> mean RPM packages can be installed into Cygwin?
>>
>> I tried to install ncbi-blast-2.2.26+-3.i686.rpm (see: 
>> ftp://ftp.ncbi.nlm.nih.gov/blast/executables/blast+/LATEST/ ) into 
>> Cygwin 1.7.13 with the command "install -i 
>> ncbi-blast-2.2.26+-3.i686.rpm". However, error message appeared as 
>> below. libc.so.6, libdl.so.2,  libm.so.6,  libnsl.so.1, and  
>> libz.so.1. Where can I get these libs? Thanks!
>>
>> $ rpm -i ncbi-blast-2.2.26+-3.i686.rpm
>> error: Failed dependencies:
>>         /usr/bin/perl is needed by ncbi-blast-2.2.26+-3
>>         libbz2.so.1 is needed by ncbi-blast-2.2.26+-3
>>         libc.so.6 is needed by ncbi-blast-2.2.26+-3
>>         libc.so.6(GLIBC_2.1.3) is needed by ncbi-blast-2.2.26+-3
>>         libc.so.6(GLIBC_2.2) is needed by ncbi-blast-2.2.26+-3
>>         libc.so.6(GLIBC_2.3) is needed by ncbi-blast-2.2.26+-3
>
> .....
> On Tue, Apr 10, 2012 at 02:03:29PM +0800, De-Jian Zhao wrote:
>
> > It seems that the compilation under Cygwin is more complicated than
> > expected.
> ==========================================================
>
> This has nothing to do with cygwin.
>
> It is 'rpm' looking for installed dependencies in the rpm database.
>
> Since everything was installed with 'setup.exe' which keeps it's own
> 'database', rpm thinks nothing is installed.
>
> You need to make sure the versions required by the rpm are installed 
> by setup,
> then you can build from a ncbi-blast-2.2.26+-3.src.rpm
>                                                ^^^
>
> The i686.rpm package is prebuilt for "some" platform (you would have 
> to know
> which from the download -- i.e. one built for suse won't necessarily 
> run on redhat, or ubuntu...  or other combinations.   Ones that do 
> will be statically
> built and will be usable on some range of OS-versions of some 
> particular OS.
> Since rpm is a linux thing, it would be built for the linux OS... so 
> double-screw.  Wrong OS, wrong executable format...etc...   look for a 
> corresponding .src. rpm, OR as someone else already suggested, look 
> for the
> 'tar' that the is included in the ".src".  -- in fact, if you have the 
> .src.,
> usually the .tar. file they build from is packed into it (then patches 
> and OS
> specific stuff is applied), so you can often just take the tar from 
> your src.rpm
> and move it to cygwin, and run it directly if it has a "configure" 
> script.
>
> it might also have something like "bootstrap.sh" (or bootstrap 
> something) that will produce a configure script -- that will usually 
> allow you to build an executable that will work on your platform (in 
> this case cygwin) -- but you
> will still have to have _needed_ dependencies installed (like 
> development packages from cygwin for some of the above).
>
> All of those packages may not be needed -- dependencies are often based
> on what options you select in configure (configure --help tells you 
> all it's options).  Sometimes you don't need all the options the 
> 'default' rpm builds
> with making life simpler.
>
> Compilation, period, other than on the system the package was designed 
> for is
> never completely trivial, but configure makes it nearly so if it is 
> used --
> most packages these days have such a script -- rpm packages just have 
> pre-built
> some pre-configured image for distribution -- may not be optimal for 
> your needs
> nor is it likely to be optimized for your machine.
>
> Hope this was of some help.
> Good luck!
>
> Linda
>
>

Thank you, Linda. When I saw the error message after installing some 
packages to satisfy the dependencies, I was wondering why the rpm 
package still complained about the already installed packages. I was not 
aware that cygwin and rpm were not sharing the 'database'. Thank you for 
making it clear to me.I will try the src.rpm when I am free.

DJ

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