Education ClassRoom/Practice

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< Education ClassRoom
Revision as of 16:52, 17 February 2009 by Ericb (Talk | contribs)

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Since we use subversion, some parts are obsolete, and need to be updated

Objective : create exercices, to practice tools used for development

TODO : define a list of items

Join the Project

Login and accounts

Find a page or a document

  • Find the web page for your own locale in project ( e.g. )
  • Find the Coding Guidelines on the Wiki ( and read it ... )
  • Find the page about cws ( Child Workspace )
  • Find mailing list archive
  • Subscribe to mailing list if you didn't yet
  • Extract mails 10 to 14 from any mailing list

Bonsai use

  • Discover Bonsai
  • Visualize changes in a cws

1) Go to

We'll try to do a request :)

2) Don't modify Module (must be All files in the repository ) Remark : note the name "repository "

3) In the Field "Branch" replace HEAD with cws_dev300_aquavcl07

4) in the field "Date" check "Since the beginning of time "

5) do not modify the other fields

6) Click "Run Query"

=> all the changes in the code, based on DEV300_m9 ( we'll explain later) are on the page !!

7) To see the diff for any commit, click in the Rev. columns. Back to retrieve the current page.

Strongly advised : 8) Look carefully at other changes, what information you can obtain here.

Remark: Bonsai helps when you are searching for changes in the code, author date .. precise information about CODE

SVN use

Outline of the ClassRoom

1) Create patches using svn 2) apply a patch 3) rebuild a module 4) rebuild a module including symbols 5) run OOo with gdb (introduction of gdb use)

Introduction : in this part, we will create, apply patches using svn tool. To simplify, we'll suppose the patches are in unified mode. Means:

- 3 lines of context before the change - a line who starts with " - " means the line before the old version (if the old version was existing) - a line starting with " + " means after the change(s), if a new version does exist - 3 lines of context after the change

For example :

ordinateur-de-eric-b-2:~/Desktop/ecntablet01 ericb$ svn diff sd/source/ui/slideshow/slideshow.hrc

Index: sd/source/ui/slideshow/slideshow.hrc
--- sd/source/ui/slideshow/slideshow.hrc        (revision 267130)
+++ sd/source/ui/slideshow/slideshow.hrc        (working copy)
@@ -38,8 +38,10 @@
 #define CM_SCREEN_BLACK        5
 #define CM_SCREEN_WHITE        6
 #define CM_ENDSHOW             7
-#define CM_FIRST_SLIDE 8
-#define CM_LAST_SLIDE  9
-#define CM_SLIDES              10
+#define CM_ERASE_ALLINK        8
+#define CM_ERASE_INK   9
+#define CM_FIRST_SLIDE 10
+#define CM_LAST_SLIDE  11
+#define CM_SLIDES              12
Create patches using svn

Lot of possibilities. Below some of them. Probably better solutions do exist. This is just a little inventory of the possibilities.

  • you got a tree, did some modifications, and you want to send the patch to a friend

The idea is to compare your current tree with the one *before* the changes.

To visualize the changes : ordinateur-de-eric-b-2:~/Desktop/moz2seamonkey01 ericb$ svn diff slideshow/source/inc/userpainteventhandler.hxx

The command (without the prompt) is :

svn diff slideshow/source/inc/userpainteventhandler.hxx

The result is :

Index: slideshow/source/inc/userpainteventhandler.hxx
--- slideshow/source/inc/userpainteventhandler.hxx      (revision 267652)
+++ slideshow/source/inc/userpainteventhandler.hxx      (working copy)
@@ -53,6 +53,9 @@
             virtual ~UserPaintEventHandler() {}
             virtual bool colorChanged( RGBColor const& rUserColor ) = 0;
+                       virtual bool eraseAllInkChanged(bool const& rEraseAllInk) =0;
+                       virtual bool eraseInkChanged(bool const& rEraseInk) =0;
             virtual bool disable() = 0;

To create the patch for true, the command is : svn diff slideshow/source/inc/userpainteventhandler.hxx > my pretty patch.diff

And " my_pretty_patch.diff " will contain the same.

  • you want to create a patch between a cws and a milestone (the one the cws is based on )

For example, to extract the changes in helpcontent2, ab65 introduced

svn diff > mydiff.diff

  • you want to create a patch between two svn revisions for a given cws

IMPORTANT: you can follow the recent commits there :

Example of change (in one line) :

svn diff

  • using svn log, you want to create the diff between two revisions of the same file

For example :

ordinateur-de-eric-b-2:~/Desktop/moz2seamonkey01 ericb$ svn log Enter passphrase for key '/Users/ericb/.ssh/id_dsa_ooo_svn':

r267684 | ericb | 2009-02-12 18:13:52 +0100 (Thu, 12 Feb 2009) | 1 line

  1. i94628# fix a path issue for finding seamonkey01

r267656 | ericb | 2009-02-12 14:13:21 +0100 (Thu, 12 Feb 2009) | 1 line

  1. i94628# other missing changes for Windows

Apply a patch

Essential options :

--dry-run : fakes the patch application *extremely usefull* if you want to check whether a patch will apply, without create garbage in your tree

-R : reverse it -> we suppose you already applied the patch, did no change and want to reverse the patch, to retrieve the same code as before

-p0 : apply a patch using the exact path the files have. Important: your tree does match with the path of the file the patch will be applied, *AND* you apply it form the right location

-p1 : you remove the first subdir of the path for every to be patched file listed in th patch

Correct way of application :

Fake the application :

patch --dry-run -p0 < my_patch.diff

If nothing wrong occurs :

patch -p0 < my_patch.diff

Other possibility, not recommended because of the UUOC (useless use of cat) :

cat my_patch.diff | patch -p0

Depth of the application:

e.g. let's suppose a patch has to modify  :

vcl/source/aqua/source/window/ vcl/source/aqua/source/gdi/salprn.cxx vcl/source/aqua/inc/salframeview.h

You can :

apply the patch from

  • the root of the sources :

patch -p0 < my_patch.diff

  • inside vcl :

patch -p1 < my_patch.diff

  • inside vcl/aqua

patch -p2 < my_patch.diff

You cannot apply patch from elsewhere, because the paths will no longer match with the one every of the file contained in it.

  • mix of applying patches + svn use

e.g. you did a wrong change in a module, and you want to reverse it directly :

cd module

svn diff apath/afile.cxx | patch -R -p0

for the entire local tree :

svn diff . | patch -R -p0

Rebuild a module where a patch has been applied
  • Introduction

We suppose we modified some files, and we need to rebuild a lib. The scheme is always the same, in every module concerned by the build.

- the first prj/build.lst does contain the modules dependencies, means all the listed modules are prerequisites - everything built inside a module is put in

e.g. on Mac OS X, type == unx , os == macx , I for Intel -> output dir is

Note: have a look in solenv/inc -> all the possible arch/os have their own makefile, containing the essential for the build.

The last modification date is used to check the dependencies.

Rule : If a .o is older than it's depenencies, it is rebuild -> once you modified a file ( touch file is enough) , build in a module will create a new lib

  • rebuild libvclmxi.dylib on Mac ( .so on Linux, .dll on Windows )

Hypothesis : we suppose the build is completed, and successfull.

cd vcl touch aqua/source/gdi/sallayout.cxx build

If you are in aqua/source/gdi , and you want to rebuild *only* the files listed in the makefile in the current dir, do :

dmake killobj build

Once done, and if you want to see the changes packaged, :

deliver cd ../instsetoo_native build # will rebuild a new installset

Else, if you just want to test your lib, put it in the right subdir (probably in <Install_dir>/ on Mac OS X )

Build including symbols


-> in vcl

cd vcl mv unxmacxi.pro_back # keep the normal build build debug="a_non_empty_sting" # means " build debug=t " is ok

The final lib, including symbols for debugging, will be in (on Mac OS X )

Replace the one already in <Install_dir>/ on Mac OS X

To debug using gdb,do :

cd <Install_dir>/

gdb --args soffice apath/afile

"r" (to start) .. and so on;

Happy debugging !

LXR use

[Complete me]

Checkout the code


- we suppose you have some bash knowledge, and some programming skills

- your .cvsrc file is ok (else ask on )

Now, open a terminal, use bash, and do :

0 ) create the environment

If you don't have a proxy, do , (in a terminal) :

export CVSROOT=""

There is a proxy, and nothing works using the line above, do, (in a terminal) :

Let the proxy be ( name ) , and the open port 1234, then just do :

export CVSROOT=":pserver;proxy=;"

And if you ignore the IP address of the gateway, but you know its name, do, (in a terminal) :

export CVSROOT=":pserver;;"

IMPORTANT : is just a fake name, as example. Please replace it with the one in your network :)

... it should work now (else, contact your sys admin).

For the next step, create TMP dir (command: mkdir TMP )

cd TMP

1) checkout vcl module from DEV300_m31

cvs co -r DEV300_m31 dtrans

Question: what happens ?

Download all tree :

mkdir DEV300_m31

cd DEV300_m31

cvs -4 co -r DEV300_m31 OpenOffice2

( -z4 is optional )

-> once done ( can be very long), and if no error occurs, you got all source code from DEV300_m31 Milestone !!

Create a patch

2) Modify one file, do "cvs up" , and comment on the result

3) using grep , retrieve the name of the milestone in the sources

4) checkout vcl from a cws under development

cvs -z4 co -r cws_dev300_aquavcl07 vcl

5) retrieve the cwsname in the sources

6) analyse the list of the subdirectories vcl contains

7) modify the code in vcl/source/gdi/sallayout.cxx

(write whatever you want, respecting C++ syntax prefered ;)

8) create a diff with the repository

change directory outside of vcl

in the current dir ( TMP ) , do :

cvs diff -u vcl > my_pretty_patch.diff

9) What does contain the patch ?

Apply and Reverse a patch

  • Simulate a patch application
  • Apply it for true

10) How reverse your changes ?

11) Be sure you have enough place on your hard disk ( count 2GB )

Fix a build breaker (most common breakages )

A) Building

Note: add your own experience here !

Building on Ubunutu 7.10

Ubuntu version : 7.10 - Gutsy Gibbon

Estimated time for the cnofiguration: 1h30

1) Download source code

install subversion : sudo apt-get install subversion

Command line for the download : svn checkout svn://

2) Java

Prefer the Sun JDK

Version of the installed Java (mini 1.5.0 ) Command line to check : java -version

In config_office tcsh was not found

Solution it to use the following option : --with-use-shell=bash

Archive::Zip is missing :

checking for required Perl modules... Can't locate Archive/ in @INC (@INC contains: /etc/perl /usr/local/lib/perl/5.8.8 /usr/local/share/perl/5.8.8 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.8 /usr/share/perl/5.8 /usr/local/lib/site_perl .) at -e line 1. BEGIN failed--compilation aborted at -e line 1. configure: error: Failed to find some modules

Solution :

apt-cache search archive | grep perl


libarchive-zip-perl - Module for manipulation of ZIP archives

Solution sudo apt-get install libarchive-zip-perl

Cups : checking for cups/cups.h... no configure: error: cups/cups.h could not be found. libcupsys2-dev or cups???-dev

Solution: sudo apt-get install libcupsys2-dev

pam :

checking for security/pam_appl.h... no configure: error: pam_appl.h could not be found. libpam-dev or pam-devel missing?

Solution: sudo apt-get install libpam0g-dev

javac: checking for javac... no configure: error: javac not found set with_jdk_home


Install Sun Java 1.5.0 from the URL below:

JDK2 installed in /usr/local, means the following option is mandatory :


Gperf: checking for gperf... no configure: error: gperf not found but needed. Install it.

Solution: sudo apt-get install gperf


checking whether to build the ODK... yes

checking for external/unowinreg/unowinreg.dll... configure: WARNING: not found, will be cross-built using mingw32

Looking at external/unowinreg, the readme invites to download unowinreg.dll at

cd ../DEV300_m39/external/unowinreg/



gtk+ stuff :

checking whether freetype is available... checking for pkg-config... /usr/bin/pkg-config checking for freetype2 >= 2.0 ... Package freetype2 was not found in the pkg-config search path

Solution : install all the gtk+ stuff (first is freetype )

sudo apt-get install libfreetype6-dev

Mozilla :

checking for mozilla-source-1.7.5.tar.gz... not found checking for mozilla-source-1.7.5.tar.bz2... not found configure: error: Mozilla source archive not found. Please copy mozilla-source-1.7.5.tar.bz2 or mozilla-source-1.7.5.tar.gz to moz/download/. The archives can be found here:

use prebuilt-archives downloadable from

For Linux:


checking X11/Xaw/Label.h usability... no checking X11/Xaw/Label.h presence... no checking for X11/Xaw/Label.h... no configure: error: Xaw include headers not found

Solution :

sudo apt-get install libxaw6-dev


checking fontconfig/fontconfig.h usability... no checking fontconfig/fontconfig.h presence... no checking for fontconfig/fontconfig.h... no configure: error: fontconfig/fontconfig.h could not be found. libfontconfig1-dev or fontconfig???-devel missing?

Solution: sudo apt-get install libfontconfig1-dev


checking for X11/extensions/Xrandr.h... no configure: error: X11/extensions/Xrandr.h could not be found. X11 dev missing?

Solution: sudo apt-get install libxrandr-dev


checking for bison... no configure: error: no bison found in $PATH, install bison

Solution: sudo apt-get install bison

Flex: checking for flex... no configure: error: no flex found in $PATH, install flex

Solution: sudo apt-get install flex


checking whether to enable GConf support... yes checking for gconf-2.0 ... Package gconf-2.0 was not found in the pkg-config search path. Perhaps you should add the directory containing `gconf-2.0.pc' to the PKG_CONFIG_PATH environment variable No package 'gconf-2.0' found configure: error: Library requirements (gconf-2.0 ) not met; consider adjusti

Solution: sudo apt-get install libgconf2-dev


checking for gnome-vfs-2.0 >= 2.6.0 ... Package gnome-vfs-2.0 was not found in the pkg-config search path. Perhaps you should add the directory containing `gnome-vfs-2.0.pc' to the PKG_CONFIG_PATH environment variable No package 'gnome-vfs-2.0' found configure: error: Library requirements (gnome-vfs-2.0 >= 2.6.0 ) not met; cons

Solution: sudo apt-get install libgnome-vfs-dev

WARNING: not available -> use the --disable-gnome-vfs option solved the issue

libgtk+-2.0 missing:

Solution: sudo apt-get install libgtk2.0-dev

Ant missing:

checking for ant.cmd... no configure: error: Ant not found - Make sure it's in the path or use --with-ant-home

Solution Download apache-ant from (e.g.) :

Install the decompressed archive in /usr/local

use : --with-ant-home=/usr/local/apache-ant-1.7.1


Use as much as possible system libs:

libxml : --with-system-openssl

To avoid broken dependencies, libxml2 + matching libxslt (development archives) must be installed.

sudo apt-get install libxslt1-dev libxslt1.1

Finaly,use the foloowing option to successfully pass configure : --with-system-libxml

openssl : --with-system-openssl

checking for openssl ... Package openssl was not found in the pkg-config search path. Perhaps you should add the directory containing `openssl.pc' to the PKG_CONFIG_PATH environment variable No package 'openssl' found


sudo apt-get install libssl-dev

expat : --with-system-expat

berkeleydb : --with-system-db

checking for db.h... no checking for db4/db.h... no configure: error: no. install the db4 libraries

Solution : sudo apt-get install libdb4.4-dev

icu: --with-system-icu

checking for genbrk... no configure: error: \genbrk\ not found in $PATH, install the icu development tool \genbrk""

Solution : sudo apt-get install libicu36-dev

neon : --with-system-neon

checking which neon to use... external checking for neon >= 0.24.0... configure: error: you need neon >= 0.24.x for system-neon

Solution: sudo apt-get install libneon26-dev

Install ccache :

sudo apt-get install ccache

edit the ~/.bashrc and add the lines :

CC="ccache gcc" CXX="ccache g++" export CC CXX

save, close and open a new term => ccache will be detected at the next configure

Final configure command line ( experimental, might be modified) :

./configure \
        --with-use-shell=bash \
        --with-jdk-home=/usr/local/jdk1.5.0_17 \
        --disable-build-mozilla \
        --disable-gnome-vfs \
        --with-ant-home=/usr/local/apache-ant-1.7.1 \
        --with-lang=fr \
        --with-system-libxml \
        --with-system-libxslt \
        --with-system-openssl \
        --with-system-expat \
        --with-system-db \
        --with-system-icu \

And configure is successfull :-)

Bootstrap :


./bootstrap # builds dmake

either :


or :

cd instsetoo_native

build --all -P4

Starts the build

See you tomorrow :)

Missing modules

e.g. missing alias in DEV300_m13 : hyphen module is not checked, causing missing headers, never delivered and then, a breakage in lingucomponent because of undefined functions/methods and so on

Solution: check out hyphen

export CVSROOT=""

Note: there is another solution for experimented devs, using tunnel

cvs co -r DEV300_m13 hyphen

Missing Files
Missing headers
(deprecated) gcc parser issues

B) Hacking

Syntax Errors
Missing headers
Multi inclusions
Linking issues
Personal tools