Bug#1015374: colobot: ftbfs with LTO (link time optimization) enabled

Tue Jul 19 17:51:07 BST 2022

Package: src:colobot
Version: 0.2.0-2
Severity: minor
Tags: sid bookworm
User: debian-gcc at lists.debian.org
Usertags: ftbfs-lto

This package currently fails to build (at least on the amd64
architecture) with link time optimizations enabled.  For a background
for LTO please see

https://wiki.debian.org/ToolChain/LTO

The goal is to enable this optimization by default in an upcoming
Debian release in dpkg-buildflags for 64bit architectures.  The goal
is to get this package to build with link time optimizations, or to
explicitly disable link time optimizations for this package build.

To reproduce the build failure, enable the lto optimization in
testing/unstable by adding "optimize=+lto" to DEB_BUILD_MAINT_OPTIONS
in the debian/rules file, or if this macro is unset, just set it:

export DEB_BUILD_MAINT_OPTIONS = optimize=+lto

Please try to fix the build with lto enabled, fixing the packaging or
forwarding the issue upstream. If the issue cannot be fixed,
explicitly disallow building the package with lto by adding to your
rules file:

export DEB_BUILD_MAINT_OPTIONS = optimize=-lto

or adding that string to your existing setting of DEB_BUILD_MAINT_OPTIONS.

The full build log can be found at:
http://qa-logs.debian.net/2022/06/09/dpkglto/colobot_0.2.0-2_unstable_dpkglto.log
The last lines of the build log are at the end of this report.

[...]
cd /<<PKGBUILDDIR>>/obj-x86_64-linux-gnu && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /<<PKGBUILDDIR>> /<<PKGBUILDDIR>>/test/cbot /<<PKGBUILDDIR>>/obj-x86_64-linux-gnu /<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/test/cbot /<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/test/cbot/CMakeFiles/CBot_console.dir/DependInfo.cmake --color=
make[4]: Leaving directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'
make  -f src/CMakeFiles/colobot.dir/build.make src/CMakeFiles/colobot.dir/build
make[4]: Leaving directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'
make[4]: Leaving directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'
make  -f test/unit/CMakeFiles/colobot_ut.dir/build.make test/unit/CMakeFiles/colobot_ut.dir/build
make  -f test/cbot/CMakeFiles/CBot_console.dir/build.make test/cbot/CMakeFiles/CBot_console.dir/build
make[4]: Entering directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'
make[4]: Entering directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'
make[4]: Entering directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'
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cd /<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/test/unit && /usr/bin/c++ -DBOOST_ALL_NO_LIB -DBOOST_FILESYSTEM_DYN_LINK -DBOOST_NO_CXX11_SCOPED_ENUMS -DBOOST_NO_SCOPED_ENUMS -DBOOST_REGEX_DYN_LINK -DBOOST_SYSTEM_DYN_LINK -DGTEST_HAS_TR1_TUPLE=0 -DHAVE_DEMANGLE -DNOEXCEPT=noexcept -DTESTS -DTEST_VIRTUAL=virtual -I/<<PKGBUILDDIR>>/test/unit/common -I/<<PKGBUILDDIR>>/test/unit/math -I/<<PKGBUILDDIR>>/test/unit -I/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/test/unit -I/<<PKGBUILDDIR>>/src -I/<<PKGBUILDDIR>>/src/.. -I/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/src -isystem /usr/include/AL -isystem /<<PKGBUILDDIR>>/lib/hippomocks -isystem /usr/include/SDL2 -isystem /<<PKGBUILDDIR>>/lib/localename -isystem /usr/src/gtest/include -isystem /usr/src/gtest -g -O2 -ffile-prefix-map=/<<PKGBUILDDIR>>=. -flto=auto -ffat-lto-objects -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -std=gnu++11 -Wall -Werror -Wold-style-cast -pedantic-errors -Wmissing-declarations -Wno-error=deprecated-declarations -Wsuggest-override  -pthread -O2 -g -DNDEBUG -Wno-suggest-override -DGTEST_HAS_PTHREAD=1 -MD -MT test/unit/CMakeFiles/colobot_ut.dir/math/matrix_test.cpp.o -MF CMakeFiles/colobot_ut.dir/math/matrix_test.cpp.o.d -o CMakeFiles/colobot_ut.dir/math/matrix_test.cpp.o -c /<<PKGBUILDDIR>>/test/unit/math/matrix_test.cpp
[ 98%] Building CXX object test/unit/CMakeFiles/colobot_ut.dir/math/vector_test.cpp.o
cd /<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/test/unit && /usr/bin/c++ -DBOOST_ALL_NO_LIB -DBOOST_FILESYSTEM_DYN_LINK -DBOOST_NO_CXX11_SCOPED_ENUMS -DBOOST_NO_SCOPED_ENUMS -DBOOST_REGEX_DYN_LINK -DBOOST_SYSTEM_DYN_LINK -DGTEST_HAS_TR1_TUPLE=0 -DHAVE_DEMANGLE -DNOEXCEPT=noexcept -DTESTS -DTEST_VIRTUAL=virtual -I/<<PKGBUILDDIR>>/test/unit/common -I/<<PKGBUILDDIR>>/test/unit/math -I/<<PKGBUILDDIR>>/test/unit -I/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/test/unit -I/<<PKGBUILDDIR>>/src -I/<<PKGBUILDDIR>>/src/.. -I/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/src -isystem /usr/include/AL -isystem /<<PKGBUILDDIR>>/lib/hippomocks -isystem /usr/include/SDL2 -isystem /<<PKGBUILDDIR>>/lib/localename -isystem /usr/src/gtest/include -isystem /usr/src/gtest -g -O2 -ffile-prefix-map=/<<PKGBUILDDIR>>=. -flto=auto -ffat-lto-objects -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -std=gnu++11 -Wall -Werror -Wold-style-cast -pedantic-errors -Wmissing-declarations -Wno-error=deprecated-declarations -Wsuggest-override  -pthread -O2 -g -DNDEBUG -Wno-suggest-override -DGTEST_HAS_PTHREAD=1 -MD -MT test/unit/CMakeFiles/colobot_ut.dir/math/vector_test.cpp.o -MF CMakeFiles/colobot_ut.dir/math/vector_test.cpp.o.d -o CMakeFiles/colobot_ut.dir/math/vector_test.cpp.o -c /<<PKGBUILDDIR>>/test/unit/math/vector_test.cpp
[ 98%] Building CXX object test/unit/CMakeFiles/colobot_ut.dir/common/system/system_linux_test.cpp.o
cd /<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/test/unit && /usr/bin/c++ -DBOOST_ALL_NO_LIB -DBOOST_FILESYSTEM_DYN_LINK -DBOOST_NO_CXX11_SCOPED_ENUMS -DBOOST_NO_SCOPED_ENUMS -DBOOST_REGEX_DYN_LINK -DBOOST_SYSTEM_DYN_LINK -DGTEST_HAS_TR1_TUPLE=0 -DHAVE_DEMANGLE -DNOEXCEPT=noexcept -DTESTS -DTEST_VIRTUAL=virtual -I/<<PKGBUILDDIR>>/test/unit/common -I/<<PKGBUILDDIR>>/test/unit/math -I/<<PKGBUILDDIR>>/test/unit -I/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/test/unit -I/<<PKGBUILDDIR>>/src -I/<<PKGBUILDDIR>>/src/.. -I/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/src -isystem /usr/include/AL -isystem /<<PKGBUILDDIR>>/lib/hippomocks -isystem /usr/include/SDL2 -isystem /<<PKGBUILDDIR>>/lib/localename -isystem /usr/src/gtest/include -isystem /usr/src/gtest -g -O2 -ffile-prefix-map=/<<PKGBUILDDIR>>=. -flto=auto -ffat-lto-objects -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -std=gnu++11 -Wall -Werror -Wold-style-cast -pedantic-errors -Wmissing-declarations -Wno-error=deprecated-declarations -Wsuggest-override  -pthread -O2 -g -DNDEBUG -Wno-suggest-override -DGTEST_HAS_PTHREAD=1 -MD -MT test/unit/CMakeFiles/colobot_ut.dir/common/system/system_linux_test.cpp.o -MF CMakeFiles/colobot_ut.dir/common/system/system_linux_test.cpp.o.d -o CMakeFiles/colobot_ut.dir/common/system/system_linux_test.cpp.o -c /<<PKGBUILDDIR>>/test/unit/common/system/system_linux_test.cpp
[100%] Linking CXX executable ../../colobot_ut
cd /<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/test/unit && /usr/bin/cmake -E cmake_link_script CMakeFiles/colobot_ut.dir/link.txt --verbose=1
/usr/bin/c++ -g -O2 -ffile-prefix-map=/<<PKGBUILDDIR>>=. -flto=auto -ffat-lto-objects -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -std=gnu++11 -Wall -Werror -Wold-style-cast -pedantic-errors -Wmissing-declarations -Wno-error=deprecated-declarations -Wsuggest-override  -pthread -O2 -g -DNDEBUG -flto=auto -ffat-lto-objects -Wl,-z,relro -rdynamic CMakeFiles/colobot_ut.dir/main.cpp.o CMakeFiles/colobot_ut.dir/app/app_test.cpp.o CMakeFiles/colobot_ut.dir/CBot/CBotToken_test.cpp.o CMakeFiles/colobot_ut.dir/CBot/CBot_test.cpp.o CMakeFiles/colobot_ut.dir/common/config_file_test.cpp.o CMakeFiles/colobot_ut.dir/graphics/engine/lightman_test.cpp.o CMakeFiles/colobot_ut.dir/math/func_test.cpp.o CMakeFiles/colobot_ut.dir/math/geometry_test.cpp.o CMakeFiles/colobot_ut.dir/math/matrix_test.cpp.o CMakeFiles/colobot_ut.dir/math/vector_test.cpp.o CMakeFiles/colobot_ut.dir/common/system/system_linux_test.cpp.o -o ../../colobot_ut  -Wl,-rpath,/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/src/CBot ../../lib/libgtest.a ../../src/libcolobotbase.a ../../src/CBot/libCBot.so ../../lib/localename/liblocalename.a -L/usr/lib/x86_64-linux-gnu  -lSDL2 -lSDL2_image -lSDL2_ttf -lGL -lGLU -lpng -lz -lGLEW /usr/lib/x86_64-linux-gnu/libboost_system.so.1.74.0 /usr/lib/x86_64-linux-gnu/libboost_filesystem.so.1.74.0 /usr/lib/x86_64-linux-gnu/libboost_regex.so.1.74.0 -lsndfile -lopenal -lphysfs -lpthread 
./src/common/system/system_other.h:33:8: error: type ‘struct SystemTimeStamp’ violates the C++ One Definition Rule [-Werror=odr]
./src/common/system/system_linux.h:31:8: note: a different type is defined in another translation unit
./src/common/system/system_other.h:35:12: note: the first difference of corresponding definitions is field ‘sdlTicks’
./src/common/system/system_linux.h:33:14: note: a field with different name is defined in another translation unit
lto1: all warnings being treated as errors
lto-wrapper: fatal error: /usr/bin/c++ returned 1 exit status
compilation terminated.
/usr/bin/ld: error: lto-wrapper failed
collect2: error: ld returned 1 exit status
make[4]: *** [test/unit/CMakeFiles/colobot_ut.dir/build.make:277: colobot_ut] Error 1
make[4]: Leaving directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'
make[3]: *** [CMakeFiles/Makefile2:1227: test/unit/CMakeFiles/colobot_ut.dir/all] Error 2
make[3]: *** Waiting for unfinished jobs....
make[4]: Leaving directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'
[100%] Built target CBot_console
make[4]: Leaving directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'
[100%] Built target colobot
make[3]: Leaving directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'
make[2]: *** [Makefile:169: all] Error 2
make[2]: Leaving directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'
dh_auto_build: error: cd obj-x86_64-linux-gnu && make -j8 "INSTALL=install --strip-program=true" VERBOSE=1 returned exit code 2
make[1]: *** [debian/rules:34: override_dh_auto_build-arch] Error 25
make[1]: Leaving directory '/<<PKGBUILDDIR>>'
make: *** [debian/rules:21: build] Error 2
dpkg-buildpackage: error: debian/rules build subprocess returned exit status 2