Source: libproxy Version: 0.4.11-4 Severity: wishlist Tags: patch Hi,
Thanks for taking care of libproxy in Debian! As part of this year's "Bootstrappable Debian" Google Summer of Code project I took a look at libproxy to break a circular build dependency as noted in the "Feedback Arc Set" section of http://bootstrap.debian.net/amd64/ and, more specifically, at http://bootstrap.debian.net/source/libproxy.html and the version-specific pages linked from it. There are two primary goals to my work on this GSoC project: - The first goal is to modify some packages so that they may be built in some limited way ("nocheck", binary-only, or build profiles like "stage1") without some of their usual build dependencies. In most cases this is caused by one or more dependency loops between binary and source packages, so that a source package requires for its building, directly or indirectly, one of its own binary packages to be already built. The modifications make the source build in a limited fashion (not generating documentation, not running tests, not building some of the binary packages) so that this may happen with only the rest of the build dependencies, so Debian may be bootstrapped on a new architecture starting from a very few cross-built toolchain packages and then moving along, source package by source package. - The second goal, which is actually closely related to the first, is that in the process of modifications, any changes (some files not regenerated, others not built at all) can be made with binary package level granularity. This means that if a binary package is built at all during a limited build, then it must have the same contents as the same binary package resulting from a full build. The point here is to avoid breakage if other packages in the archive depend on some functionality provided by the omitted files; if so, it should be obvious that the functionality is missing, and the clearest way to do that is by omitting a full binary package or, rather, delaying its build until the rest of the build dependencies are present. The libproxy source package builds what I'd call a minimal usable set of binary packages (a shared library, a development package for it, a couple of support packages) and then another set of modules that allow the core library to interface with various third-party packages. Consequently, since some of those third-party packages use libproxy on their own, this creates a lot of build dependency loops. So what do you think about the attached patch that checks for a "stage1" build profile specified in the DEB_BUILD_PROFILES variable and, if so, skips the build of most of the libproxy modules, thus obviating the need for many of the build dependencies? In this iteration, one would also have to manually remove the offending build dependencies from the control file; I will file another bug that makes use of the new <profile.*> restriction and the new Build-Profiles binary stanza header to make this completely automated. However, that would have to wait for the actual introduction of build profile-aware tools in the Debian archive infrastructure. If anything should go wrong with the patch, it is also available at https://gitorious.org/roam-debian-bootstrap/libproxy-debian/commits/roam-stage1-build Thanks in advance for your time, and thanks for your work on Debian! G'luck, Peter -- System Information: Debian Release: jessie/sid APT prefers testing APT policy: (990, 'testing') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 3.14-2-amd64 (SMP w/4 CPU cores) Locale: LANG=bg_BG.UTF-8, LC_CTYPE=bg_BG.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash
From b65915d4b632e36b3bfc585fe708e65e984c23bc Mon Sep 17 00:00:00 2001 From: Peter Pentchev <[email protected]> Date: Sat, 2 Aug 2014 01:57:11 +0300 Subject: [PATCH 1/2] Break a couple of build dependency loops. Several widely-used libraries depend on libproxy which, in its turn, tries to build plug-ins to interface with the same widely-used libraries. This creates several build dependency loops, as outlined on http://bootstrap.debian.net/source/libproxy.html and the versioned pages linked from that page. This commit introduces a stage1 build profile that builds pretty much only the base libproxy functionality so that the dependent libraries may be built. Afterwards, a full build will also generate the plug-ins. --- debian/control.in | 4 ++++ debian/rules | 35 +++++++++++++++++++++++++---------- 2 files changed, 29 insertions(+), 10 deletions(-) diff --git a/debian/control.in b/debian/control.in index e36f5e7..a9c838b 100644 --- a/debian/control.in +++ b/debian/control.in @@ -3,7 +3,11 @@ Section: libs Priority: optional Maintainer: Emilio Pozuelo Monfort <[email protected]> Uploaders: @GNOME_TEAM@ +# In the stage1 build profile, remove both cli-common-dev and mono-devel. Build-Depends-Indep: cli-common-dev (>= 0.5.7~), mono-devel (>= 2.4.3) +# In the stage1 build profile, remove libmozjs185-dev, kdelibs5-dev, +# libqt4-dev, libwebkitgtk-3.0-dev, libjavascriptcoregtk-3.0-dev, +# libglib2.0-dev, libxmu-dev. Build-Depends: debhelper (>= 9), gnome-pkg-tools, netbase, diff --git a/debian/rules b/debian/rules index 1be67b7..ec42de8 100755 --- a/debian/rules +++ b/debian/rules @@ -10,41 +10,56 @@ libproxy := $(shell sed -nr 's/^Package:[[:space:]]*(libproxy[0-9]+)[[:space:]]* export LDFLAGS := $(shell dpkg-buildflags --get LDFLAGS) -Wl,--as-needed # only invoke dh --with cli if cli-common-dev is present -WITH_CLI = --with cli -WITH_DOTNET = -DWITH_DOTNET=ON -ifeq (,$(wildcard /usr/share/perl5/Debian/Debhelper/Sequence/cli.pm)) WITH_CLI = WITH_DOTNET = -DWITH_DOTNET=OFF +ifneq (,$(wildcard /usr/share/perl5/Debian/Debhelper/Sequence/cli.pm)) +ifeq (,$(filter stage1,$(DEB_BUILD_PROFILES))) +WITH_CLI = --with cli +WITH_DOTNET = -DWITH_DOTNET=ON +endif endif DEB_HOST_MULTIARCH ?= $(shell dpkg-architecture -qDEB_HOST_MULTIARCH) CONFIGURE_FLAGS = $(WITH_DOTNET) \ -DWITH_VALA=ON \ - -DWITH_GNOME3=ON \ - -DWITH_MOZJS=ON \ - -DWITH_WEBKIT3=ON \ -DGMCS_EXECUTABLE=/usr/bin/mono-csc \ -DCMAKE_SKIP_RPATH=ON \ -DBIPR=0 \ -DLIB_INSTALL_DIR=/usr/lib/$(DEB_HOST_MULTIARCH) \ -DLIBEXEC_INSTALL_DIR=/usr/lib/$(DEB_HOST_MULTIARCH)/libproxy/$(SHLIBVER) +ifeq (,$(filter stage1,$(DEB_BUILD_PROFILES))) +CONFIGURE_FLAGS += \ + -DWITH_GNOME3=ON \ + -DWITH_MOZJS=ON \ + -DWITH_WEBKIT3=ON +DH_EXCLUDE = +else +CONFIGURE_FLAGS += \ + -DWITH_GNOME3=OFF \ + -DWITH_MOZJS=OFF \ + -DWITH_WEBKIT3=OFF +DH_EXCLUDE = -Nlibproxy1-plugin-gsettings -Nlibproxy1-plugin-kconfig -Nlibproxy1-plugin-mozjs -Nlibproxy1-plugin-webkit -Nlibproxy0.4-cil -Nlibproxy-cil-dev +endif + override_dh_auto_configure: dh_auto_configure -- $(CONFIGURE_FLAGS) override_dh_install-arch: - dh_install + dh_install $(DH_EXCLUDE) rm -f \ debian/libproxy-dev/usr/lib/$(DEB_HOST_MULTIARCH)/pkgconfig/libproxy-sharp-*.pc override_dh_install-indep: - dh_install + dh_install $(DH_EXCLUDE) +ifeq (,$(filter stage1,$(DEB_BUILD_PROFILES))) sed -i 's!/usr/lib/mono/libproxy-sharp!/usr/lib/cli/libproxy-sharp-0.4!' \ debian/libproxy-cil-dev/usr/lib/pkgconfig/libproxy-sharp-1.0.pc +endif override_dh_makeshlibs: - dh_makeshlibs -V '$(libproxy) (>= $(SHLIBVER))' -- -c4 + dh_makeshlibs -V '$(libproxy) (>= $(SHLIBVER))' $(DH_EXCLUDE) -- -c4 %: - dh $@ $(WITH_CLI) --with python2 + dh $@ $(WITH_CLI) --with python2 $(DH_EXCLUDE) -- 2.1.0.rc1
From ca711b094dced83678dc784f354f4d11ac9686ca Mon Sep 17 00:00:00 2001 From: Peter Pentchev <[email protected]> Date: Sat, 2 Aug 2014 02:00:21 +0300 Subject: [PATCH 2/2] Regenerate the control file. --- debian/control | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/debian/control b/debian/control index cc432f1..380c958 100644 --- a/debian/control +++ b/debian/control @@ -8,7 +8,11 @@ Section: libs Priority: optional Maintainer: Emilio Pozuelo Monfort <[email protected]> Uploaders: Debian GNOME Maintainers <[email protected]>, Laurent Bigonville <[email protected]> +# In the stage1 build profile, remove both cli-common-dev and mono-devel. Build-Depends-Indep: cli-common-dev (>= 0.5.7~), mono-devel (>= 2.4.3) +# In the stage1 build profile, remove libmozjs185-dev, kdelibs5-dev, +# libqt4-dev, libwebkitgtk-3.0-dev, libjavascriptcoregtk-3.0-dev, +# libglib2.0-dev, libxmu-dev. Build-Depends: debhelper (>= 9), gnome-pkg-tools, netbase, -- 2.1.0.rc1
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