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 for submit@bugs.debian.org; Thu, 09 Jul 2026 16:42:29 +0000
From: Santiago Vila &lt;sanvila@debian.org&gt;
To: Debian BTS &lt;submit@bugs.debian.org&gt;
Subject: unifrac-tools: FTBFS with the nocheck build profile
X-Debbugs-Cc: sanvila@debian.org
Message-Id: &lt;E1whrpV-004hiQ-00@paradis.debian.org&gt;
Date: Thu, 09 Jul 2026 16:42:29 +0000
Delivered-To: submit@bugs.debian.org

Package: src:unifrac-tools
Version: 1.6.1-1
Severity: serious
Tags: forky sid ftbfs
User: debian-qa@lists.debian.org
Usertags: ftbfs-nocheck-profile

Dear maintainer:

During a rebuild of all packages in unstable using the nocheck build profile,
this package failed to build.

Below you will find the last part of the build log (probably the most
relevant part, but not necessarily). If required, the full build log
is available here:

https://people.debian.org/~sanvila/build-logs/202607/

A wiki page discussing how to reproduce bugs in this category and
possible solutions is available here:

https://wiki.debian.org/qa.debian.org/FTBFS/nocheck

About the archive rebuild: The build was made on virtual machines from AWS,
using sbuild and a reduced chroot with only build-essential packages.

If you cannot reproduce the bug please contact me privately, as I
am willing to provide ssh access to a virtual machine where the bug is
fully reproducible.

If this is really a bug in one of the build-depends, please use
reassign and add an affects on src:unifrac-tools, so that this is still
visible in the BTS web page for this package.

Thanks.

--------------------------------------------------------------------------------
[...]
make api_cpu_basic
make[5]: Entering directory '/&lt;&lt;PKGBUILDDIR&gt;&gt;'
export BUILD_VARIANT=cpu_basic ; export BUILD_FULL_OPTIMIZATION=False ; cd src &amp;&amp; make clean &amp;&amp; make api
make[6]: Entering directory '/&lt;&lt;PKGBUILDDIR&gt;&gt;/src'
rm -f *.o ssu_cpu_basic faithpd_cpu_basic *.a test_su test_ska test_api test_su_api libssu_cpu_basic.so unifrac_task_noclass_*.cpp unifrac_task_api_*.h unifrac_task.cpp 
make[6]: Leaving directory '/&lt;&lt;PKGBUILDDIR&gt;&gt;/src'
make[6]: Entering directory '/&lt;&lt;PKGBUILDDIR&gt;&gt;/src'
h5c++ -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/&lt;&lt;PKGBUILDDIR&gt;&gt;=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -fopenmp -DUNIFRAC_ENABLE_ACC_NV=1 -DUNIFRAC_ENABLE_ACC_AMD=1 -Wall  -std=c++17 -pedantic -I. -O3 -fPIC -L/&lt;&lt;PKGBUILDDIR&gt;&gt;/debian/tmp/usr/lib -c tree.cpp -o tree.o
cc1plus: warning: ‘-Werror=’ argument ‘-Werror=implicit-function-declaration’ is not valid for C++
h5c++ -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/&lt;&lt;PKGBUILDDIR&gt;&gt;=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -fopenmp -DUNIFRAC_ENABLE_ACC_NV=1 -DUNIFRAC_ENABLE_ACC_AMD=1 -Wall  -std=c++17 -pedantic -I. -O3 -fPIC -L/&lt;&lt;PKGBUILDDIR&gt;&gt;/debian/tmp/usr/lib -c biom.cpp -o biom.o
cc1plus: warning: ‘-Werror=’ argument ‘-Werror=implicit-function-declaration’ is not valid for C++
h5c++ -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/&lt;&lt;PKGBUILDDIR&gt;&gt;=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -fopenmp -DUNIFRAC_ENABLE_ACC_NV=1 -DUNIFRAC_ENABLE_ACC_AMD=1 -Wall  -std=c++17 -pedantic -I. -O3 -fPIC -L/&lt;&lt;PKGBUILDDIR&gt;&gt;/debian/tmp/usr/lib -c biom_inmem.cpp -o biom_inmem.o
cc1plus: warning: ‘-Werror=’ argument ‘-Werror=implicit-function-declaration’ is not valid for C++
h5c++ -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/&lt;&lt;PKGBUILDDIR&gt;&gt;=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -fopenmp -DUNIFRAC_ENABLE_ACC_NV=1 -DUNIFRAC_ENABLE_ACC_AMD=1 -Wall  -std=c++17 -pedantic -I. -O3 -fPIC -L/&lt;&lt;PKGBUILDDIR&gt;&gt;/debian/tmp/usr/lib -c biom_subsampled.cpp -o biom_subsampled.o
cc1plus: warning: ‘-Werror=’ argument ‘-Werror=implicit-function-declaration’ is not valid for C++
h5c++ -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/&lt;&lt;PKGBUILDDIR&gt;&gt;=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -fopenmp -DUNIFRAC_ENABLE_ACC_NV=1 -DUNIFRAC_ENABLE_ACC_AMD=1 -Wall  -std=c++17 -pedantic -I. -O3 -fPIC -L/&lt;&lt;PKGBUILDDIR&gt;&gt;/debian/tmp/usr/lib -c tsv.cpp -o tsv.o
cc1plus: warning: ‘-Werror=’ argument ‘-Werror=implicit-function-declaration’ is not valid for C++
h5c++ -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/&lt;&lt;PKGBUILDDIR&gt;&gt;=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -fopenmp -DUNIFRAC_ENABLE_ACC_NV=1 -DUNIFRAC_ENABLE_ACC_AMD=1 -Wall  -std=c++17 -pedantic -I. -O3 -fPIC -L/&lt;&lt;PKGBUILDDIR&gt;&gt;/debian/tmp/usr/lib -c unifrac.cpp -o unifrac.o
cc1plus: warning: ‘-Werror=’ argument ‘-Werror=implicit-function-declaration’ is not valid for C++
h5c++ -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/&lt;&lt;PKGBUILDDIR&gt;&gt;=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -fopenmp -DUNIFRAC_ENABLE_ACC_NV=1 -DUNIFRAC_ENABLE_ACC_AMD=1 -Wall  -std=c++17 -pedantic -I. -O3 -fPIC -L/&lt;&lt;PKGBUILDDIR&gt;&gt;/debian/tmp/usr/lib -c cmd.cpp -o cmd.o
cc1plus: warning: ‘-Werror=’ argument ‘-Werror=implicit-function-declaration’ is not valid for C++
h5c++ -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/&lt;&lt;PKGBUILDDIR&gt;&gt;=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -fopenmp -DUNIFRAC_ENABLE_ACC_NV=1 -DUNIFRAC_ENABLE_ACC_AMD=1 -Wall  -std=c++17 -pedantic -I. -O3 -fPIC -L/&lt;&lt;PKGBUILDDIR&gt;&gt;/debian/tmp/usr/lib -c skbio_alt.cpp -o skbio_alt.o
cc1plus: warning: ‘-Werror=’ argument ‘-Werror=implicit-function-declaration’ is not valid for C++
h5c++ -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/&lt;&lt;PKGBUILDDIR&gt;&gt;=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -fopenmp -DUNIFRAC_ENABLE_ACC_NV=1 -DUNIFRAC_ENABLE_ACC_AMD=1 -Wall  -std=c++17 -pedantic -I. -O3 -fPIC -L/&lt;&lt;PKGBUILDDIR&gt;&gt;/debian/tmp/usr/lib api.cpp -c -o api.o -fPIC
cc1plus: warning: ‘-Werror=’ argument ‘-Werror=implicit-function-declaration’ is not valid for C++
h5c++ -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/&lt;&lt;PKGBUILDDIR&gt;&gt;=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -fopenmp -DUNIFRAC_ENABLE_ACC_NV=1 -DUNIFRAC_ENABLE_ACC_AMD=1 -Wall  -std=c++17 -pedantic -I. -O3 -fPIC -L/&lt;&lt;PKGBUILDDIR&gt;&gt;/debian/tmp/usr/lib -c unifrac_internal.cpp -o unifrac_internal.o
cc1plus: warning: ‘-Werror=’ argument ‘-Werror=implicit-function-declaration’ is not valid for C++
python3 generate_unifrac_task_noclass.py cpu direct &gt; unifrac_task_noclass_cpu.cpp
/bin/sh: 1: python3: not found
make[6]: *** [Makefile:189: unifrac_task_noclass_cpu.cpp] Error 127
make[6]: Leaving directory '/&lt;&lt;PKGBUILDDIR&gt;&gt;/src'
make[5]: *** [Makefile:139: api_cpu_basic] Error 2
make[5]: Leaving directory '/&lt;&lt;PKGBUILDDIR&gt;&gt;'
make[4]: *** [Makefile:62: all_cpu_basic] Error 2
make[4]: Leaving directory '/&lt;&lt;PKGBUILDDIR&gt;&gt;'
make[3]: *** [Makefile:39: all_cpu] Error 2
make[3]: Leaving directory '/&lt;&lt;PKGBUILDDIR&gt;&gt;'
make[2]: *** [Makefile:28: all] Error 2
make[2]: Leaving directory '/&lt;&lt;PKGBUILDDIR&gt;&gt;'
dh_auto_build: error: make -j1 INSTALL=&quot;install --strip-program=true&quot; PREFIX=/&lt;&lt;PKGBUILDDIR&gt;&gt;/debian/tmp/usr returned exit code 2
make[1]: *** [debian/rules:15: override_dh_auto_build] Error 25
make[1]: Leaving directory '/&lt;&lt;PKGBUILDDIR&gt;&gt;'
make: *** [debian/rules:10: binary] Error 2
dpkg-buildpackage: error: debian/rules binary subprocess failed with exit status 2
--------------------------------------------------------------------------------
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