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Bug#1115167: marked as done (libpisp: FTBFS: ../src/helpers/media_device.cpp:251:14: error: ignoring return value of ‘int lockf(int, int, __off64_t)’ declared with attribute ‘warn_unused_result’ [-Werror=unused-result])

Your message dated Thu, 25 Sep 2025 21:04:55 +0000
with message-id <E1v1t95-00EC3S-1i@fasolo.debian.org>
and subject line Bug#1115167: fixed in libpisp 1.2.1-3
has caused the Debian Bug report #1115167,
regarding libpisp: FTBFS: ../src/helpers/media_device.cpp:251:14: error: ignoring return value of ‘int lockf(int, int, __off64_t)’ declared with attribute ‘warn_unused_result’ [-Werror=unused-result]
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
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immediately.)


-- 
1115167: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1115167
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Source: libpisp
Version: 1.2.1-2
Severity: important
Tags: ftbfs forky sid
Justification: fails to build from source
User: debian-glibc@lists.debian.org
Usertags: glibc-2.42

Dear maintainer,

During a rebuild of all packages in unstable with glibc 2.42 from
experimental, your package failed to build. Below you will find how the
build ends. If required, the full build log is available here:

https://people.debian.org/~aurel32/glibc-2.42/

The build failure is due to a missing check of the result of the call to
lockf(), so there is no guarantee that the file is correctly locked,
basically making this call useless.

About the archive rebuild: The build was made on virtual machines from
AWS, using sbuild, a reduced chroot with only build-essential packages
and glibc 2.42 from experimental.

Regards
Aurelien

--------------------------------------------------------------------------------
[...]
[21/25] c++ -Isrc/libpisp.so.1.2.1.p -Isrc -I../src -Isrc/libpisp -I../src/libpisp -I/usr/include -fdiagnostics-color=always -D_GLIBCXX_ASSERTIONS=1 -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -Wextra -Werror -std=c++17 -DPISP_LOGGING_ENABLE=1 -DBOOST_BIND_GLOBAL_PLACEHOLDERS -Wno-address-of-packed-member -g -O2 -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -pthread -DBOOST_LOG_DYN_LINK=1 -DBOOST_LOG_SETUP_DYN_LINK=1 -DBOOST_THREAD_BUILD_DLL=1 -DBOOST_THREAD_USE_DLL=1 -DBOOST_SYSTEM_DYN_LINK=1 -DBOOST_ALL_NO_LIB -MD -MQ src/libpisp.so.1.2.1.p/helpers_backend_device.cpp.o -MF src/libpisp.so.1.2.1.p/helpers_backend_device.cpp.o.d -o src/libpisp.so.1.2.1.p/helpers_backend_device.cpp.o -c ../src/helpers/backend_device.cpp
[22/25] c++ -Isrc/libpisp.so.1.2.1.p -Isrc -I../src -Isrc/libpisp -I../src/libpisp -I/usr/include -fdiagnostics-color=always -D_GLIBCXX_ASSERTIONS=1 -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -Wextra -Werror -std=c++17 -DPISP_LOGGING_ENABLE=1 -DBOOST_BIND_GLOBAL_PLACEHOLDERS -Wno-address-of-packed-member -g -O2 -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -pthread -DBOOST_LOG_DYN_LINK=1 -DBOOST_LOG_SETUP_DYN_LINK=1 -DBOOST_THREAD_BUILD_DLL=1 -DBOOST_THREAD_USE_DLL=1 -DBOOST_SYSTEM_DYN_LINK=1 -DBOOST_ALL_NO_LIB -MD -MQ src/libpisp.so.1.2.1.p/helpers_media_device.cpp.o -MF src/libpisp.so.1.2.1.p/helpers_media_device.cpp.o.d -o src/libpisp.so.1.2.1.p/helpers_media_device.cpp.o -c ../src/helpers/media_device.cpp
FAILED: src/libpisp.so.1.2.1.p/helpers_media_device.cpp.o 
c++ -Isrc/libpisp.so.1.2.1.p -Isrc -I../src -Isrc/libpisp -I../src/libpisp -I/usr/include -fdiagnostics-color=always -D_GLIBCXX_ASSERTIONS=1 -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -Wextra -Werror -std=c++17 -DPISP_LOGGING_ENABLE=1 -DBOOST_BIND_GLOBAL_PLACEHOLDERS -Wno-address-of-packed-member -g -O2 -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -pthread -DBOOST_LOG_DYN_LINK=1 -DBOOST_LOG_SETUP_DYN_LINK=1 -DBOOST_THREAD_BUILD_DLL=1 -DBOOST_THREAD_USE_DLL=1 -DBOOST_SYSTEM_DYN_LINK=1 -DBOOST_ALL_NO_LIB -MD -MQ src/libpisp.so.1.2.1.p/helpers_media_device.cpp.o -MF src/libpisp.so.1.2.1.p/helpers_media_device.cpp.o.d -o src/libpisp.so.1.2.1.p/helpers_media_device.cpp.o -c ../src/helpers/media_device.cpp
../src/helpers/media_device.cpp: In member function ‘std::map<std::__cxx11::basic_string<char>, libpisp::helpers::DeviceFd>::iterator libpisp::helpers::MediaDevice::unlock(const std::string&)’:
../src/helpers/media_device.cpp:251:14: error: ignoring return value of ‘int lockf(int, int, __off64_t)’ declared with attribute ‘warn_unused_result’ [-Werror=unused-result]
  251 |         lockf(it->second.Get(), F_ULOCK, 0);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1plus: all warnings being treated as errors
[23/25] c++ -Isrc/libpisp.so.1.2.1.p -Isrc -I../src -Isrc/libpisp -I../src/libpisp -I/usr/include -fdiagnostics-color=always -D_GLIBCXX_ASSERTIONS=1 -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -Wextra -Werror -std=c++17 -DPISP_LOGGING_ENABLE=1 -DBOOST_BIND_GLOBAL_PLACEHOLDERS -Wno-address-of-packed-member -g -O2 -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -pthread -DBOOST_LOG_DYN_LINK=1 -DBOOST_LOG_SETUP_DYN_LINK=1 -DBOOST_THREAD_BUILD_DLL=1 -DBOOST_THREAD_USE_DLL=1 -DBOOST_SYSTEM_DYN_LINK=1 -DBOOST_ALL_NO_LIB -MD -MQ src/libpisp.so.1.2.1.p/helpers_v4l2_device.cpp.o -MF src/libpisp.so.1.2.1.p/helpers_v4l2_device.cpp.o.d -o src/libpisp.so.1.2.1.p/helpers_v4l2_device.cpp.o -c ../src/helpers/v4l2_device.cpp
ninja: build stopped: subcommand failed.
dh_auto_build: error: cd obj-x86_64-linux-gnu && LC_ALL=C.UTF-8 ninja -j2 -v returned exit code 1
make: *** [debian/rules:6: binary] Error 25
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2
--------------------------------------------------------------------------------

--- End Message ---
--- Begin Message --- 
Source: libpisp
Source-Version: 1.2.1-3
Done: Dylan Aïssi <daissi@debian.org>

We believe that the bug you reported is fixed in the latest version of
libpisp, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1115167@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Dylan Aïssi <daissi@debian.org> (supplier of updated libpisp package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512

Format: 1.8
Date: Thu, 25 Sep 2025 22:34:57 +0200
Source: libpisp
Architecture: source
Version: 1.2.1-3
Distribution: unstable
Urgency: medium
Maintainer: Debian Multimedia Maintainers <debian-multimedia@lists.debian.org>
Changed-By: Dylan Aïssi <daissi@debian.org>
Closes: 1115167
Changes:
 libpisp (1.2.1-3) unstable; urgency=medium
 .
   * Cherry-pick upstream patch fixing FTBFS (Closes: #1115167)
Checksums-Sha1:
 0f58237ed18ac5b959085acaa73fcfb0911fa398 2103 libpisp_1.2.1-3.dsc
 ec8aa7998b06df1b342c70019632aa9ed4125779 6980 libpisp_1.2.1-3.debian.tar.xz
 a1a436ed7da94603b8cb4756a9b12fdba3c336aa 8388 libpisp_1.2.1-3_amd64.buildinfo
Checksums-Sha256:
 350661f8ae013d527beeb6d517f6e941be3e2b1615f2c245e9b20f37d459e7b3 2103 libpisp_1.2.1-3.dsc
 b8aa6d0cdbb1d7a249ca3ae2e1c7e379e96c8903de79a3728eef866e9fa81819 6980 libpisp_1.2.1-3.debian.tar.xz
 0757df7d56d852c921a289197ae3e3ff006713f898f0a4a24dbc4d762a344b0b 8388 libpisp_1.2.1-3_amd64.buildinfo
Files:
 b2e7a5d5095d07c4432433f455faf42f 2103 libs optional libpisp_1.2.1-3.dsc
 383e2f8fa44186a4bd532bec1dfc95b5 6980 libs optional libpisp_1.2.1-3.debian.tar.xz
 08a896cf4837046ecc9040c237082ea4 8388 libs optional libpisp_1.2.1-3_amd64.buildinfo

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--- End Message ---
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