debian package management tips

compile deb packages using debian`s compilation project

compile and packages

> dpkg-buildpackage -us -uc -nc           or 
> dpkg-buildpackage -us -b -rfakeroot

compile but not package (under the source code directory)

> ./debian/rules build      or 
> dh make

clean up complied files (under the source code directory)

> ./debian/rules  clean     or 
> dh clean

patching

install devscripts

sudo apt install devscripts

add quilt script environment for quilt push and quilt pop command

for where in ./ ../ ../../ ../../../ ../../../../ ../../../../../; do
    if [ -e ${where}debian/rules -a -d ${where}debian/patches ]; then
        export QUILT_PATCHES=debian/patches
        break
    fi
done

apply patches

>  quilt push -a       # apply  ./debian/patches
>  quilt pop -a         # remove all applied patches,

compilation options

check compilation options

dpkg-buildflags

modify compilation options

  1. environment remove -O2 flags form c and c++

> export  DEB_CFLAGS_STRIP="-O2"
> export  DEB_CXXFLAGS_STRIP="-O2"

append -g flags to c and c++

> export DEB_CFLAGS_APPEND="-g"
> export DEB_CXXFLAGS_APPEND="-g"

you can also write the flag to /usr/local/etc/dpkg/buildflags.conf, example:

APPEND CFLAGS -ggdb -O3
STRIP CXXFLAGS -O2

reference dpkg-buildflags https://www.man7.org/linux/man-pages/man1/dpkg-buildflags.1.html

how to prevent binary file or xxx.so files from being striped

use vim to edit ./debian/rules under the source code directory, add new line

override_dh_strip:
	# don`t write anything

if this is not useful, you can also modify system files, but it is only suitable for use in debugging envrionments.

find the file /usr/share/perl5/Debian/Debhelper/Buildsystem/makefile.pm, find --strip-program=true and modify it to --strip-program=false. please note that canceling the --strip-program wile cause the binary file and xxx.so file to become larger.