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/*! \page builddependencies Generating build dependencies automatically
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As we start updating packages for the next Red Hat distro, I'd like to see
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packages start to make use of build dependencies. Basically build
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dependencies are just like install dependencies, but they are resolved
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against the build system just after parsing the spec file. Syntactically,
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build dependencies look just like install dependencies in a spec file with
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"Build" prefixed:
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\verbatim
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BuildPreReq:
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BuildRequires:
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BuildConflicts:
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\endverbatim
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All the above dependencies include versions, files, existence/range tests, etc.
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The build dependency checking can also be turned off with --nodeps if necessary
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just like install dependency checking can. Eventually, build dependencies will
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be automated in rpm, but the major impediment to that effort is the engineering
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required to maintain the pretense that src rpm's are "noarch".
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Meanwhile, I've added a package called "InDependence-1.0" to powertools-6.2
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that may be of use in detecting build dependencies that can be added to
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spec files as part of rebuilding packages for Red Hat 6.2.
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Here's a short example of how to generate the package/file names that were used
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while building gnorpm using InDependence:
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\verbatim
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rpm -U /mnt/redhat/comps/powertools/6.2/i386/InDependence-1.0-3.i386.rpm
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rpm -i /mnt/redhat/comps/dist/6.2/SRPMS/gnorpm-0.9-11.src.rpm
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cd /usr/src/redhat/SPECS
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dep -detail rpmbuild -ba gnorpm.spec >& xxx
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...
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(the build will take longer since both dep and strace are pigs)
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...
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grep -- '::' xxx > yyy
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\endverbatim
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\verbatim
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Aside: The dep perl wrapper is a "pig" only because it's exec'ing
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rpm -qf <filename>
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in order to turn filenames into package names. There are easier/faster
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ways to get this information...
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There's no way to speed up the
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/sbin/strace -q -etrace=open,execve -o ...
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command itself. The eventual implementation in rpm will snatch the
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same open/execve syscalls using LD_PRELOAD.
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Patches cheerfully accepted :-)
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\endverbatim
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Here's what's in yyy (\<packagename\>::\<filename\> format):
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\verbatim
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ORBit-devel-0.4.95-2::/usr/bin/orbit-config
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XFree86-libs-3.3.5-6::/usr/X11R6/lib/libICE.so.6
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XFree86-libs-3.3.5-6::/usr/X11R6/lib/libSM.so.6
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XFree86-libs-3.3.5-6::/usr/X11R6/lib/libX11.so.6
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XFree86-libs-3.3.5-6::/usr/X11R6/lib/libXext.so.6
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audiofile-0.1.9-1::/usr/lib/libaudiofile.so.0
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autoconf-2.13-5::/usr/bin/autoconf
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autoconf-2.13-5::/usr/bin/autoheader
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autoconf-2.13-5::/usr/share/autoconf/acgeneral.m4
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autoconf-2.13-5::/usr/share/autoconf/autoconf.m4f
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automake-1.4-5::/usr/bin/aclocal
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automake-1.4-5::/usr/bin/automake
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bash-1.14.7-16::/bin/sh
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bash-1.14.7-16::/etc/bashrc
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binutils-2.9.1.0.23-7::/usr/bin/strip
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binutils-2.9.1.0.23-7::/usr/lib/libbfd-2.9.1.0.24.so
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binutils-2.9.1.0.23-7::/usr/lib/libopcodes-2.9.1.0.24.so
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bzip2-0.9.5c-1::/usr/lib/libbz2.so.0
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dev-2.7.10-2::/dev/null
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diffutils-2.7-16::/usr/bin/cmp
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egcs-1.1.2-25::/usr/bin/gcc
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egcs-1.1.2-25::/usr/lib/gcc-lib/i386-redhat-linux/egcs-2.91.66/specs
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esound-0.2.14-1::/usr/lib/libesd.so.0
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file-3.27-3::/usr/bin/file
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file-3.27-3::/usr/share/magic
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fileutils-4.0-8::/bin/chgrp
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fileutils-4.0-8::/bin/chmod
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fileutils-4.0-8::/bin/chown
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fileutils-4.0-8::/bin/cp
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fileutils-4.0-8::/bin/ln
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fileutils-4.0-8::/bin/ls
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fileutils-4.0-8::/bin/mkdir
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fileutils-4.0-8::/bin/mv
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fileutils-4.0-8::/bin/rm
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fileutils-4.0-8::/usr/bin/install
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findutils-4.1-32::/usr/bin/xargs
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gawk-3.0.4-1::/bin/awk
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gawk-3.0.4-1::/bin/gawk
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gettext-0.10.35-13::/usr/bin/xgettext
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glib-1.2.5-1::/usr/lib/libglib-1.2.so.0
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glib-1.2.5-1::/usr/lib/libgmodule-1.2.so.0
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glib-devel-1.2.5-1::/usr/bin/glib-config
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glibc-2.1.2-13::/etc/localtime
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glibc-2.1.2-13::/etc/nsswitch.conf
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glibc-2.1.2-13::/lib/ld-linux.so.2
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glibc-2.1.2-13::/lib/libc.so.6
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glibc-2.1.2-13::/lib/libcrypt.so.1
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glibc-2.1.2-13::/lib/libdb.so.2
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glibc-2.1.2-13::/lib/libdl.so.2
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glibc-2.1.2-13::/lib/libm.so.6
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glibc-2.1.2-13::/lib/libnsl.so.1
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glibc-2.1.2-13::/lib/libnss_dns.so.2
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glibc-2.1.2-13::/lib/libnss_files.so.2
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glibc-2.1.2-13::/lib/libnss_nis.so.2
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glibc-2.1.2-13::/lib/libnss_nisplus.so.2
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glibc-2.1.2-13::/lib/libresolv.so.2
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glibc-2.1.2-13::/usr/bin/ldd
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gnome-libs-1.0.54-1::/usr/lib/libart_lgpl.so.2
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gnome-libs-1.0.54-1::/usr/lib/libgnome.so.32
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gnome-libs-1.0.54-1::/usr/lib/libgnomesupport.so.0
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gnome-libs-1.0.54-1::/usr/lib/libgnomeui.so.32
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gnome-libs-devel-1.0.54-1::/usr/bin/gnome-config
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grep-2.3-2::/bin/egrep
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grep-2.3-2::/bin/fgrep
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grep-2.3-2::/bin/grep
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gtk+-1.2.5-2::/usr/lib/libgdk-1.2.so.0
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gtk+-1.2.5-2::/usr/lib/libgtk-1.2.so.0
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imlib-1.9.7-1::/usr/lib/libgdk_imlib.so.1
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libghttp-1.0.4-1::/usr/lib/libghttp.so.1
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libtool-1.3.3-1::/usr/bin/libtoolize
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libtool-1.3.3-1::/usr/share/libtool/config.guess
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libtool-1.3.3-1::/usr/share/libtool/config.sub
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libtool-1.3.3-1::/usr/share/libtool/ltconfig
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libtool-1.3.3-1::/usr/share/libtool/ltmain.sh
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libxml-1.4.0-1::/usr/lib/libxml.so.1
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libxml-devel-1.4.0-1::/usr/bin/xml-config
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m4-1.4-12::/usr/bin/m4
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make-3.77-6::/usr/bin/make
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mktemp-1.5-1::/bin/mktemp
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net-tools-1.53-1::/bin/hostname
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patch-2.5-9::/usr/bin/patch
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rootfiles-5.2-5::/root/.bashrc
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rpm-3.0.4-0.16::/bin/rpm
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rpm-3.0.4-0.16::/usr/lib/librpm.so.0
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rpm-3.0.4-0.16::/usr/lib/rpm/find-provides
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rpm-3.0.4-0.16::/usr/lib/rpm/find-requires
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rpm-3.0.4-0.16::/usr/lib/rpm/macros
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rpm-3.0.4-0.16::/usr/lib/rpm/rpmpopt
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rpm-3.0.4-0.16::/usr/lib/rpm/rpmrc
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sed-3.02-4::/bin/sed
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setup-2.0.5-1::/etc/group
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setup-2.0.5-1::/etc/host.conf
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setup-2.0.5-1::/etc/passwd
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sh-utils-2.0-1::/bin/basename
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sh-utils-2.0-1::/bin/false
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sh-utils-2.0-1::/bin/sleep
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sh-utils-2.0-1::/bin/true
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sh-utils-2.0-1::/usr/bin/expr
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sh-utils-2.0-1::/usr/bin/id
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texinfo-3.12h-2::/usr/bin/makeinfo
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textutils-2.0-2::/bin/cat
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textutils-2.0-2::/bin/sort
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textutils-2.0-2::/usr/bin/cut
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textutils-2.0-2::/usr/bin/tr
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zlib-1.1.3-5::/usr/lib/libz.so.1
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\endverbatim
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The information can be used to generate build prerequisites. What is still
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needed is a sensible approach on
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\verbatim
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1) eliminating obvious common dependencies (e.g. libtool, egcs).
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2) identifying (and removing for now) per-platform build dependencies.
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3) deciding on whether to add the build dependency on a file or on the
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package that contains the file.
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4) if adding a dependency on a package, choosing version ranges as
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appropriate.
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\endverbatim
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but that's up to individual packagers.
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*/
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