Apostolos\’ Daily Plate

Να ποιοι φταίνε!

Posted in Πολιτικά by asyropoulos on Φεβρουαρίου 20, 2010

Compiling Mono on OpenSolaris

Posted in OpenSolaris by asyropoulos on Φεβρουαρίου 19, 2010

Compiling mono on OpenSolaris is not a straightforward task so I have decided to explain what one has to do in order to compile it. The «recipe» is based on the following explanation.


In order to build mono I have used gcc-4.3.2, which is part of package developer/gcc/gcc-432. First of all, one needs to build  libgdiplus-x.y. After uncompressing the source code, enter the following  commands to build this library.:

CC=gcc-4.3.2 ./configure --prefix=/opt/mono

If you prefer a different installation folder, you should use this alternative folder in the --prefix=
Now download and uncompress mono-2.x.y.tar.bz2 Inside the source tree create a file which must contain the following:

ulimit -Hs $((10*1024))
prctl -s -t basic -n process.max-stack-size -v 8MB $$
prctl -s -t privileged -n process.max-stack-size -v 128MB $$
CC=gcc-4.3.2 CXX=g++-4.3.2 CFLAGS="-I/opt/mono/include" \
LDFLAGS="-L/opt/mono/lib -R/opt/mono" \
./configure --prefix=/opt/mono  --with-jit=yes \
--with-large-heap=yes --with-tls=pthread

Then execute this script and it will build mono.  In the installation phase it might be necessary to create a similar script. Next we need to build mono-basic-x.y.tar.bz2. As in the previous case, download and uncompress the source and inside the source tree create another script that will contain the following lines:

ulimit -Hs $((10*1024))
prctl -s -t basic -n process.max-stack-size -v 8MB $$
prctl -s -t privileged -n process.max-stack-size -v 128MB $$
CC=gcc-4.3.2 CXX=g++-4.3.2 CFLAGS="-I/opt/mono/include" \
LDFLAGS="-L/opt/mono/lib -R/opt/mono/lib" ./configure --prefix=/opt/mono-2.6.1

One should be able to build gnome-sharp-x.y.z, gtk-sharp-x.y.z, and gnome-desktop-sharp-x.y.z. with similar scripts. That’s all.

The latest version of mono (i.e., version 2.10.1) compiles far more easily than the previous versions. I have managed to produce binaries for the i386-pc-solaris2.11 and   x86_64-pc-solaris2.11 platforms with essentially the same recipe. First of all, download the Boehm-Demers-Weiser conservative garbage collector and installed in the folder where you will install mono (e.g., /opt/mono). Then make sure you have the various binaries from the GNU-tool-chain. For the i386-pc-solaris2.11 platform you can used the following command to configure compilation:

CFLAGS="-I/opt/mono-2.10.1/include" \
LDFLAGS="-L/opt/mono/lib -R/opt/mono/lib" \
./configure   --prefix=/opt/mono --disable-dtrace \
--with-gc=boehm --with-sigaltstack=no

When configuration finishes, you need to edit file mono/profiler/Makefile. In particular, you need to modify the -D_FILE_OFFSET_BITS=64 preprocessor flag (see the CPPFLAGS section) and make it -D_FILE_OFFSET_BITS=32. Now, you can build mono. For the x86_64-pc-solaris2.11 you can used the following command:

CC=x86_64-pc-solaris2.11-gcc CXX=x86_64-pc-solaris2.11-g++  \
CFLAGS="-I/opt/mono/include" LDFLAGS="-m64 -L/opt/mono/lib -R/opt/mono/lib" \
./configure --with-gc=boehm --prefix=/opt/mono --disable-dtrace --with-sigaltstack=no

Here x86_64-pc-solaris2.11-gcc and x86_64-pc-solaris2.11-g++ are scripts that call the correspodning compiler in 64-bit more. For example, the contents of x86_64-pc-solaris2.11-gcc follow:

#! /bin/bash
exec /usr/bin/gcc -m64 "$@"

Building the other components is very easy! In fact, I have compiled pinta and the following scree-shot shows how it works in my system.

Can we classify real scientific journals?

Posted in Επιστήμη by asyropoulos on Φεβρουαρίου 15, 2010

When two scientific journals follow the same publication standards (e.g., papers are blindly reviewed by at least three reviewers), then how can we say that one is better than the other? Apparently, the European Science Foundation through the European Reference Index for the Humanities is attempting to classify journals in humanities.  On the other hand, a number of editors have made their objection to this attempt loud and clear in a common statement. I totally agree with them when they say

Truly ground-breaking work may be more likely to appear from marginal, dissident or unexpected sources, rather than from a well-established and entrenched mainstream.

In my own experience, established journals are too conservative and they do not dare to publish quirky ideas. Consequently, by adopting such a scheme Europe will drive its scientists to work on «established» ideas only…

Βανκούβερ 2010;

Posted in Διάφορα by asyropoulos on Φεβρουαρίου 13, 2010

Μόλις τώρα άνοιξα την τηλεόραση και είδα πως η ΕΡΤ προβάλλει σε μαγνητοσκόπηση την τελετή έναρξης των χειμερινών ολυμπιακών αγώνων. Αλήθεια έχουμε εμείς χρήματα για να προβάλλουμε ένα θέαμα που κανένας Έλληνας δεν πρόκειται να δει;

Η κοτσάνα της χρονιάς!

Posted in 1 by asyropoulos on Φεβρουαρίου 9, 2010

«Μουσουλμάνο πρόεδρο έχουν οι ΗΠΑ, ως προς τι αυτά που λέτε ότι δεν δίνουν βίζα!» Αυτό δήλωσε χθες το βράδυ ο αυτοκρατωρ Μιχαήλ (κατά κόσμο Mιχαήλ Χρυσοχοΐδης) στη Βουλή!

Time to pull troops out of Afghanistan

Posted in Πολιτικά by asyropoulos on Φεβρουαρίου 6, 2010

Greece is definitely in a dire financial situation therefore it does not have the luxury to spend money on things that do not concern its citizens. Therefore, I believe the Greek government should pull its troops out of Afghanistan and in other region it has deployed soldiers.

Κάποτε, ίσως το 2300!

Posted in Πολιτικά by asyropoulos on Φεβρουαρίου 3, 2010

Δεν υφίσταται συγκεκριμένο χρονοδιάγραμμα για το visa waiver program

Ήταν που η εξωτερική πολιτική ήταν το φόρτε του Γιωργάκη!

Κόναν ο βάρβαρος

Posted in Παιδεία by asyropoulos on Φεβρουαρίου 2, 2010

Ο τύπος της φωτογραφίας είναι γνωστός ως Κόναν ο βάρβαρος και εμφανίστηκε σε εκπομπή τύπου trash-TV.  Μοναδική απορία: πώς γίνεται και έχουμε τόσους… Κόναν;