要使用 gcov 其實很簡單，只要在編譯跟連結的時候加上
-fprofile-arcs -ftest-coverage
這兩個 flag 即可。
不過我們的 project 是使用 CMake 所以改法稍微有點不同，下面就是修改的 diff
ubuntu@ubuntu-Vostro-V131 ~/kde/src/choqok (git-svn)-[plurk] % git diff
diff --git a/microblogs/plurk/CMakeLists.txt b/microblogs/plurk/CMakeLists.txt
index 2950374..0fb6cfa 100644
--- a/microblogs/plurk/CMakeLists.txt
+++ b/microblogs/plurk/CMakeLists.txt
@@ -32,7 +32,8 @@ plurklistdialog_base.ui
kde4_add_plugin(choqok_plurk ${choqok_plurk_SRCS})
-target_link_libraries(choqok_plurk ${KDE4_KDEUI_LIBS} ${KDE4_KIO_LIBS} ${QJSON_LIBRARY} ${QTOAUTH_LIBRARY} choqok plurkapihelper)
+add_definitions(-fprofile-arcs -ftest-coverage)
+target_link_libraries(choqok_plurk ${KDE4_KDEUI_LIBS} ${KDE4_KIO_LIBS} ${QJSON_LIBRARY} ${QTOAUTH_LIBRARY} choqok plurkapihelper -fprofile-arcs)

# Install


改完之後重新編譯，我的環境是依照 KDE Build Environment[2] 建立的，所以我是這樣編譯並執行程式的
cs choqok && kdebuild && ~/kde/inst/master/bin/choqok
執行時記得每項功能都點一點，這樣才會產生較完整的資料。

最後，我改使用 lcov[3]，而不是 gcov，來產生較漂亮的網頁報表。
ubuntu@ubuntu-Vostro-V131 ~/kde/src/choqok (git-svn)-[plurk] % lcov -d ../../build/choqok/microblogs/plurk/CMakeFiles/choqok_plurk.dir/ -capture -o choqok.info
Capturing coverage data from ../../build/choqok/microblogs/plurk/CMakeFiles/choqok_plurk.dir/
Found gcov version: 4.6.1
Scanning ../../build/choqok/microblogs/plurk/CMakeFiles/choqok_plurk.dir/ for .gcda files ...
Found 19 data files in ../../build/choqok/microblogs/plurk/CMakeFiles/choqok_plurk.dir/
Processing choqok_plurk.dir/plurkaccount.gcda
Processing choqok_plurk.dir/plurkapishowthread.gcda
... ...
Processing choqok_plurk.dir/plurkapisearchtimelinewidget.gcda
Processing choqok_plurk.dir/plurkapimicroblogwidget.gcda
Processing choqok_plurk.dir/choqok_plurk_automoc.gcda
Finished .info-file creation


ubuntu@ubuntu-Vostro-V131 ~/kde/src/choqok (git-svn)-[plurk] % genhtml -o results choqok.info
Reading data file choqok.info
Found 104 entries.
Found common filename prefix "/home/ubuntu/kde"
Writing .css and .png files.
Generating output.
Processing file build/choqok/libchoqok/choqokbehaviorsettings.h
Processing file build/choqok/libchoqok/choqokappearancesettings.h
... ...
Processing file /usr/include/qt4/QtGui/qcolor.h
Processing file /usr/include/qt4/QtXml/qdom.h
Writing directory view page.
Overall coverage rate:
lines......: 37.8% (1369 of 3619 lines)
functions..: 46.5% (546 of 1173 functions)
branches...: 27.7% (599 of 2164 branches)


ubuntu@ubuntu-Vostro-V131 ~/kde/src/choqok (git-svn)-[plurk] % konqueror results/index.html

最後附上其他有使用到的參考資料
http://www.yuanma.org/data/2006/0613/article_805.htm
http://xuwenzhang.org/blog/tag/gcov/

1. http://gcc.gnu.org/onlinedocs/gcc/Gcov.html
2. http://techbase.kde.org/Getting_Started/Build/Environment
3. http://ltp.sourceforge.net/coverage/lcov.php

tar xf rtl8190p_linux_2.6.0011.1029.2009.tar.gz
sudo mv rtl8190p_linux_2.6.0011.1029.2009 /usr/src/rtl8190p-0011.1029.2009/

Modified the Makefile and copy out the .ko file

@make -C $(KSRC) SUBDIRS=$(RTL819x_DIR)/HAL/$(HAL_SUB_DIR) modules
+ cp ./HAL/rtl8192/r8190_pci.ko .


Prepare files needed, “dkms.conf”, “install.sh”, “remove.sh”
% cat /usr/src/rtl8190p-0011.1029.2009/dkms.conf
PACKAGE_NAME="rtl8190p"
PACKAGE_VERSION="0011.1029.2009"
CLEAN="make clean"
BUILT_MODULE_NAME[0]="r8190"
DEST_MODULE_NAME[0]="r8190"
DEST_MODULE_LOCATION[0]="/updates"
POST_INSTALL="install.sh $dkms_tree/$PACKAGE_NAME/$PACKAGE_VERSION"
POST_REMOVE="remove.sh"
AUTOINSTALL="yes"

% cat /usr/src/rtl8190p-0011.1029.2009/install.sh
cp -a firmware/RTL8190P /lib/firmware/
% cat /usr/src/rtl8190p-0011.1029.2009/remove.sh
rm -rf /lib/firmware/RTL8190P
And remember to give them execution permission
sudo chmod a+x /usr/src/rtl8190p-0011.1029.2009/{install,remove}.sh

Add this driver into dkms system
% sudo dkms add -m rtl8190p -v 0011.1029.2009

DKMS: add Completed.

Try to build it
% sudo dkms build -m rtl8190p -v 0011.1029.2009

DKMS: build Completed.

No error, so try to install it and see if everything all correct.
% sudo dkms install -m rtl8190p -v 0011.1029.2009

DKMS: install Completed.

Now, try to load the module and test the driver
sudo modprobe r8190_pci
dmesg | tail

Pack the .deb package
% sudo dkms mkdsc -m rtl8190p -v 0011.1029.2009 --source-only
Using /etc/dkms/template-dkms-mkdsc
copying template...
modifying debian/changelog...
modifying debian/compat...
modifying debian/control...
modifying debian/copyright...
modifying debian/dirs...
modifying debian/postinst...
modifying debian/prerm...
modifying debian/README.Debian...
modifying debian/rules...
copying legacy postinstall template...
Copying source tree...
Building source package... dpkg-source --before-build rtl8190p-dkms-0011.1029.2009
debian/rules clean
dpkg-source -b rtl8190p-dkms-0011.1029.2009
dpkg-source: warning: no source format specified in debian/source/format, see dpkg-source(1)
dpkg-genchanges -S >../rtl8190p-dkms_0011.1029.2009_source.changes
dpkg-genchanges: including full source code in upload
dpkg-source --after-build rtl8190p-dkms-0011.1029.2009

DKMS: mkdsc Completed.
Moving built files to /var/lib/dkms/rtl8190p/0011.1029.2009/dsc...
Cleaning up temporary files...


You can find the .deb file here
% ls -l /var/lib/dkms/rtl8190p/0011.1029.2009/deb
total 2020
-rw-r--r-- 1 root root 2066436 Sep 3 20:21 rtl8190p-dkms_0011.1029.2009_all.deb


acelan@acelan-nb ~ % cat /proc/acpi/processor/*/power
active state: C0
max_cstate: C8
maximum allowed latency: 749931 usec
states:
C1: type[C1] promotion[--] demotion[--] latency[001] usage[00034144] duration[00000000000000000000]
C2: type[C2] promotion[--] demotion[--] latency[001] usage[12402973] duration[00000000041800676364]
active state: C0
max_cstate: C8
maximum allowed latency: 749931 usec
states:
C1: type[C1] promotion[--] demotion[--] latency[001] usage[00017168] duration[00000000000000000000]
C2: type[C2] promotion[--] demotion[--] latency[001] usage[14252404] duration[00000000042491108472]

Then get fadt(Fixed ACPI Description table) and disassemble it
sudo cat /proc/acpi/fadt > /tmp/fadt.dat
acelan@acelan-nb ~ % iasl -d /tmp/fadt.dat

Loading Acpi table from file /tmp/fadt.dat
Acpi Data Table [FACP] decoded, written to "/tmp/fadt.dsl"

Check those two values to see if C2 is smaller then 100(0×64) and C3 is smaller then 1000(0×3E8).
acelan@acelan-nb ~ % grep Latency /tmp/fadt.dsl
[060h 0096 2] C2 Latency : 0001
[062h 0098 2] C3 Latency : 03E9

If not, that means BIOS blocks the system switch to C2/C3 state.

In drivers/acpi/processor_idle.c:325 (linux 2.6.35)
/*
* FADT specified C2 latency must be less than or equal to
* 100 microseconds.
*/
if (acpi_gbl_FADT.C2latency > ACPI_PROCESSOR_MAX_C2_LATENCY) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"C2 latency too large [%d]\n", acpi_gbl_FADT.C2latency));
/* invalidate C2 */
pr->power.states[ACPI_STATE_C2].address = 0;
}

/*
* FADT supplied C3 latency must be less than or equal to
* 1000 microseconds.
*/
if (acpi_gbl_FADT.C3latency > ACPI_PROCESSOR_MAX_C3_LATENCY) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"C3 latency too large [%d]\n", acpi_gbl_FADT.C3latency));
/* invalidate C3 */
pr->power.states[ACPI_STATE_C3].address = 0;
}


get repo utility from below link

http://source.android.com/download/using-repo

Then run
repo init -u git://github.com/cyanogen/android.git -b eclair
repo sync

Create a file buildspec.mk with those contents(for Nexus One)
TARGET_PRODUCT:=cyanogen_passion
TARGET_BUILD_VARIANT:=eng
TARGET_BUILD_TYPE:=release

Run the command to setup you environment
. build/envsetup.sh

To specifically configure the build system for CyanogenMod
lunch cyanogen_passion-eng

Connect you Nexus One with USB and open debug mode to retrieve proprietary library from cell phone
(cd vendor/google/passion;./extract-files.sh)

make -j4

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 62D38753
sudo apt-get update
sudo aptitude install handbrake-cli

HandBrakeCLI -i ccc.avi -o ccc.mp4

It’s done, if no .rej files be produced.

If git am failed, it’ll try to apply the other successful part and produce the .rej files to indicate the failed part.

Edit the failed files then, and using git status to make sure how many files infected and using git add files to add them or using git add -u to add all not updated files.

Finally, git am --resolved

Note for the zsh user. (2010/01/12)
I changed my default shell to zsh recently and found the apply patch command is broken. Although zsh claim that it’s compatible with bash, there are still some difference. But the good news is we can overcome this problem by adding one more line in the .zshrc
setopt GLOB_SUBST
More detail, please read this

acelan@acelan-nb:~/workspace/ubuntu-karmic$ git branch -r

origin/HEAD -> origin/master
origin/arm
origin/ec2
origin/fsl-imx51
origin/master
origin/mvl-dove
origin/netbook
origin/patches-that-need-love
origin/pending-upstream-patches
origin/test_branch_1

acelan@acelan-nb:~/workspace/ubuntu-karmic$ git checkout -b test origin/test_branch_1

Checking out files: 100% (9533/9533), done.
Branch test set up to track remote branch test_branch_1 from origin.
Switched to a new branch ‘test’

acelan@acelan-nb:~/workspace/ubuntu-karmic$ git log

commit a2c978c3ffb96982b3876b37c0a21fcc787234bc
Author: AceLan Kao ＜acelan@ooo.xxx.com>
Date: Fri Jun 12 13:42:45 2009 +0800

only for git test

commit fba4b54f8f16a11ff3e57b7ac76d437b5d831695
Author: AceLan ＜acelan@acelan-nb.(none)>
Date: Tue Jun 9 16:17:23 2009 +0800

UBUNTU: [Upstream]

Signed-off-by: AceLan ＜acelan@acelan-nb.(none)>

It was my second day, and I didn’t know too much about git. Of course, the branch was already been deleted, and nobody will know what I had did. :p

If you would like to do more extra work after installing the kernel package, modify this file
debian/control-scripts/postinst

Clone Jaunty kernel and add my public repository, so that I can publish my modification to public git tree.
git clone --reference linux-2.6 git://kernel.ubuntu.com/ubuntu/ubuntu-jaunty.git
git remote add zinc git+ssh://zinc.ubuntu.com/srv/kernel.ubuntu.com/git/acelan/acelan-jaunty.git
NOTE. The reference git tree(ex. linux-2.6) shouldn’t be removed under any circumstances, or the reference object will disappear and the git tree will become unusable. The file .git/objects/info/alternates will record the referenced git tree, try to specify an available one, if you removed the original reference tree accidentally.

We usually cherry pick upstream kernel commit, this is the command.
git cherry-pick -s -e -x aa1812b3e

And the request letter format for cherry pick.
git request-pull \
\
git://kernel.ubuntu.com//my-jaunty.git \
> new_branch_1-request-pull.txt