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Re: [ccp4bb]: CCP4 on RedHat 7: conclusions and recommended action

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thanks for your summary.

In what you write there's a little (maybe totally insignificant)
confusion between minor subversions (denoted by .<number>) of the
compiler, and patch levels (denoted by -<number>). 

Here's my understanding (but see e.g.
http://gcc.gnu.org/gcc-2.95/gcc-2.95.2.html) -

2.96 and 2.97 are development versions and should not be used for
production. The fact that RedHat distributes 2.96 with RH7 has been
critisized a lot. If people _do_ want to use/experiment with 2.96, they
should at least update to 2.96-69 from 2.96-54! 3.0 is scheduled for end
of Q1/2001

2.95.2 is what the GCC people recommend for production work. Anybody
have a RPM of that???

2.95.1 is what I've been using successfully for some time now. URL of
the RPM is in your summary, and in my earlier posting.

2.95 (i.e. 2.95-3, 2.95-4 and so on) is stable, but older than 2.95.1

2.91 comes in a disguise as kgcc in RH7 and is stable


Kevin Cowtan wrote:
> ***  For details on how to be removed from this list visit the  ***
> ***    CCP4 home page http://www.dl.ac.uk/CCP/CCP4/main.html    ***
> If you are running CCP4 on an out-of-box RedHat 7 machine, CHECK YOUR
> Your results may be unreliable.
> Unfortunately there are so many variables that the only way to be sure
> seems to be to run the refmac5_tls.exam in $CEXAM/unix/runnable: this
> should stop after 20 cycles with an Free R-factor of sbout 0.198. It
> would be useful if as many people as possible could tell us whether this
> script works, along with their gcc and glibc versions.
> Refmac shows these problems most clearly, because it performs the most
> complex calculations, but most other programs are likely to be affected
> to a greater or lesser extent.
> Garib's little test program fails here at > -O1 using the default RedHat
> 7 compiler (gcc-2.96-54) and an updated glibc (glibc-2.1.94-3). Type
> 'rpm -q gcc glibc' to check if you are running these version. There seem
> to be other problems at -O1 for the later gcc-2.96-69, although it runs
> Garib's small test OK. In other words:
> 2.95-1:   Works for Garib's demo, and for refmac at -O2
> 2.96-54:  May fail for Garib's demo, fails for CCP4 libraries and
> refmac5 -O1
> 2.96-69:  Works for Garib's demo, may fail for CCP4 libraries or refmac5
> -O1
> I installed gcc-2.95-1 (an older version), which gives the correct
> results from the refmac5_tls.exam example script. Garib reports success
> with refmac even at -O2
> I have made a tar file of the resulting binary distribution. This comes
> with no warrenty of any sort. If your local laws forbid `no warrenty'
> clauses, then you are forbidden from downloading this file. Otherwise,
> pick it up from:
>   ftp://ftp.ysbl.york.ac.uk/pub/ccp4/ccp4-4.1-rh7.tar.gz  (20Mb)
> This contains only the bin and lib directories: install it over the top
> of your normal installation.
> -----------------------------------------------------------------------------------
> Alternatively, you can install a new compiler on your system. I outline
> how to do this below without losing the current ones, but it is not for
> the faint-hearted. The following instructions will probably wreck your
> system and destroy your data - don't do it:
> First download you desired packages. I used gcc-2.95.1-3 and
> gcc-g77-2.95.1-3
> on Kay's recommendation, from
> ftp://sunsite.auc.dk/disk1/redhat-contrib/libc6/i386/
> 2.95-2 is also well thought of.
> Now you need to unpack the files without overwriting your existing
> compilers.
>  cp gcc*rpm /tmp
>  cd /tmp
>  rpm2cpio gcc-2.95.1-3.rpm | cpio -i -d --no-absolute-filenames
>  rpm2cpio gcc-g77-2.95.1-3.rpm | cpio -i -d --no-absolute-filenames
> (This trick can also be useful for installing software without root
> access, but it won't work in this case).
> Now we su root and copy the compiler files into their version specific
> location:
>  cp -r /tmp/usr/lib/gcc-lib/i386-redhat-linux/2.95.1
> /usr/lib/gcc-lib/i386-redhat-linux/
> Finally copy the binaries:
>  cp /tmp/usr/bin/gcc /usr/bin/gcc_2.95-1
>  cp /tmp/usr/bin/g77 /usr/bin/g77_2.95-1
> Now exit root and set your environment variables to pick up the new
> compilers
>  setenv CC gcc_2.95-1
>  setenv FC g77_2.95-1
> Now go back and re-run the ccp4 configure script, then make. You should
> see the new compiler being used for everything expect maybe ccif.

Kay Diederichs         http://strucbio.biologie.uni-konstanz.de/~kay 
email: Kay.Diederichs@uni-konstanz.de  Tel +49 7531 88 4049 Fax 3183
Fakultaet fuer Biologie, Universitaet Konstanz 
Box M656, D-78457 Konstanz, Germany