Bug#1128955: mpi4py-fft FTCBFS: unsatisfiable sphinx dependencies

[Helmut Grohne]

Source: mpi4py-fft
Version: 2.0.6-2
Tags: patch
User: debian-cross at lists.debian.org
Usertags: cross-satisfiability

mpi4py-fft cannot be cross built from source because its sphinx
dependency is not satisfiable. The package already separates its
documentation to an arch:all package and limits the documentation build
to the indep part. The only reason to keep the sphinx dependency is for
using the debhelper addon. When using debhelper addons declaratively
(Build-Depends: dh-sequence-*), they can also be moved to
Build-Depends-Indep and then python3-sphinx can also be moved there. I'm
attaching a patch for your convenience and used reproducible builds to
verify that it does not introduce unwanted changes.

Helmut
-------------- next part --------------
diff -Nru mpi4py-fft-2.0.6/debian/changelog mpi4py-fft-2.0.6/debian/changelog
--- mpi4py-fft-2.0.6/debian/changelog	2025-02-27 16:31:41.000000000 +0100
+++ mpi4py-fft-2.0.6/debian/changelog	2026-02-24 11:29:19.000000000 +0100
@@ -1,3 +1,10 @@
+mpi4py-fft (2.0.6-2.1) UNRELEASED; urgency=medium
+
+  * Non-maintainer upload.
+  * Demote sphinx dependencies to Build-Depends-Indep. (Closes: #-1)
+
+ -- Helmut Grohne <helmut at subdivi.de>  Tue, 24 Feb 2026 11:29:19 +0100
+
 mpi4py-fft (2.0.6-2) unstable; urgency=medium
 
   * add numpy3 to dh rules for numpy ABI. Thanks Adrian Bunk.
diff -Nru mpi4py-fft-2.0.6/debian/control mpi4py-fft-2.0.6/debian/control
--- mpi4py-fft-2.0.6/debian/control	2025-02-27 16:31:41.000000000 +0100
+++ mpi4py-fft-2.0.6/debian/control	2026-02-24 11:29:19.000000000 +0100
@@ -5,16 +5,18 @@
 Uploaders: Drew Parsons <dparsons at debian.org>
 Build-Depends: debhelper-compat (= 13),
  cython3,
- dh-python,
+ dh-sequence-python3,
+ dh-sequence-numpy3,
  libfftw3-dev,
  mpi-default-dev,
  python3-all-dev,
  python3-setuptools,
  python3-mpi4py,
  python3-numpy,
- python3-sphinx,
 Build-Depends-Indep:
+ dh-sequence-sphinxdoc,
  libjs-mathjax <!nodoc>,
+ python3-sphinx,
  python3-sphinx-rtd-theme <!nodoc>,
  texinfo <!nodoc>
 Standards-Version: 4.6.2
diff -Nru mpi4py-fft-2.0.6/debian/rules mpi4py-fft-2.0.6/debian/rules
--- mpi4py-fft-2.0.6/debian/rules	2025-02-27 16:31:41.000000000 +0100
+++ mpi4py-fft-2.0.6/debian/rules	2026-02-24 11:27:55.000000000 +0100
@@ -7,7 +7,7 @@
 export DEB_HOST_MULTIARCH ?= $(shell dpkg-architecture -q DEB_HOST_MULTIARCH)
 
 %:
-	dh $@ --with python3,numpy3,sphinxdoc --buildsystem=pybuild
+	dh $@ --buildsystem=pybuild
 
 
 execute_after_dh_auto_build-indep: