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Date: Sun, 23 Nov 2025 20:20:08 +0100
From: Helmut Grohne <helmut@subdivi.de>
To: Debian Bug Tracking System <submit@bugs.debian.org>
Subject: libimobiledevice FTCBFS: fails checking for a Python development
 environment
Message-ID: <20251123192008.GA347092@subdivi.de>
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Source: libimobiledevice
Version: 1.4.0-1
Tags: patch
User: debian-cross@lists.debian.org
Usertags: ftcbfs

libimobiledevice fails to cross build from source for armhf, because its
check for a consistent Python development environment fails there. It is
unclear to me why this succeeds for other architectures. Generally, one
can see that all cross builds try to use the build architecture library
directory. The typical root cause is using the wrong sysconfigdata and
the usual solution is to export _PYTHON_SYSCONFIGDATA_NAME. I'm
attaching a patch for your convenience. Please consider applying it.

Helmut

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Content-Disposition: attachment;
	filename="libimobiledevice_1.4.0-1.1.debdiff"

diff -Nru libimobiledevice-1.4.0/debian/changelog libimobiledevice-1.4.0/debian/changelog
--- libimobiledevice-1.4.0/debian/changelog	2025-10-26 21:48:31.000000000 +0100
+++ libimobiledevice-1.4.0/debian/changelog	2025-11-23 19:41:42.000000000 +0100
@@ -1,3 +1,10 @@
+libimobiledevice (1.4.0-1.1) UNRELEASED; urgency=medium
+
+  * Non-maintainer upload.
+  * Fix FTCBFS: Export _PYTHON_SYSCONFIGDATA_NAME for the extension build. (Closes: #-1)
+
+ -- Helmut Grohne <helmut@subdivi.de>  Sun, 23 Nov 2025 19:41:42 +0100
+
 libimobiledevice (1.4.0-1) unstable; urgency=medium
 
   * Team upload.
diff -Nru libimobiledevice-1.4.0/debian/rules libimobiledevice-1.4.0/debian/rules
--- libimobiledevice-1.4.0/debian/rules	2025-10-08 01:03:27.000000000 +0200
+++ libimobiledevice-1.4.0/debian/rules	2025-11-23 19:41:42.000000000 +0100
@@ -2,6 +2,10 @@
 
 export DEB_LDFLAGS_MAINT_APPEND = -Wl,-O1 -Wl,-z,defs
 export DEB_BUILD_MAINT_OPTIONS=hardening=+all
+include /usr/share/dpkg/architecture.mk
+ifneq ($(DEB_BUILD_ARCH),$(DEB_HOST_ARCH))
+export _PYTHON_SYSCONFIGDATA_NAME=_sysconfigdata__${DEB_HOST_ARCH_OS}_${DEB_HOST_MULTIARCH}
+endif
 
 configure_flags += \
 		--prefix=/usr \

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