Re: Build failure on the Reef release

[Yong Yuan <yycslab@xxxxxxxxx>]

Thanks, Kefu! When I ran ninja -v, I didn't see any other error message other than "ninja: build stopped: subcommand failed." The step and the output right before this message is below. The file .ninja_log does not contain any error message, either. I also reran the step below and it simply completed successfully. Any suggestion on what I can do to gather more detailed error messages? 

[767/2207] /usr/bin/ccache /opt/rh/gcc-toolset-11/root/usr/bin/g++ -DBOOST_ASIO_DISABLE_THREAD_KEYWORD_EXTENSION -DBOOST_ASIO_HAS_IO_URING -DBOOST_ASIO_USE_TS_EXECUTOR_AS_DEFAULT -DHAVE_CONFIG_H -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -D_REENTRANT -D_THREAD_SAFE -D__CEPH__ -D__STDC_FORMAT_MACROS -D__linux__ -Isrc/include -I../src -isystem boost/include -isystem include -isystem ../src/xxHash -isystem ../src/fmt/include -isystem ../src/jaegertracing/opentelemetry-cpp/api/include -isystem ../src/jaegertracing/opentelemetry-cpp/exporters/jaeger/include -isystem ../src/jaegertracing/opentelemetry-cpp/ext/include -isystem ../src/jaegertracing/opentelemetry-cpp/sdk/include -Og -g -fPIC -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-free -DBOOST_PHOENIX_STL_TUPLE_H_ -Wall -fno-strict-aliasing -fsigned-char -Wtype-limits -Wignored-qualifiers -Wpointer-arith -Werror=format-security -Winit-self -Wno-unknown-pragmas -Wnon-virtual-dtor -Wno-ignored-qualifiers -ftemplate-depth-1024 -Wpessimizing-move -Wredundant-move -Wstrict-null-sentinel -Woverloaded-virtual -DCEPH_DEBUG_MUTEX -fstack-protector-strong -D_GLIBCXX_ASSERTIONS -fdiagnostics-color=auto -std=c++2a -MD -MT src/mds/CMakeFiles/mds.dir/CInode.cc.o -MF src/mds/CMakeFiles/mds.dir/CInode.cc.o.d -o src/mds/CMakeFiles/mds.dir/CInode.cc.o -c ../src/mds/CInode.cc

On Sat, Dec 2, 2023 at 5:37 PM kefu chai <tchaikov@xxxxxxxxx> wrote:

On Sun, Dec 3, 2023 at 5:00 AM Yong Yuan <yycslab@xxxxxxxxx> wrote:

Hi, 

I'm trying to build a DEBUG version of Ceph's reef-release branch on a virtual Ubuntu-LTS 22.04 running on Lima by following the README on Ceph's github repo. The build failed and the last CMake error was ""g++-11: error: unrecognized command-line option '-Wimplicit-const-int-float-conversion'". Could anyone please help me figure out I can do to track down and fix the compilation error? Below are more details. 

The system configuration is as follows: 

> uname -a
Linux lima-ceph-dev 5.15.0-86-generic #96-Ubuntu SMP Wed Sep 20 08:23:49 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux

> lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 22.04.3 LTS
Release: 22.04
Codename: jammy

I followed the instructions on the README in Ceph's github repo: https://github.com/ceph/ceph, and the command ./do_cmake.sh failed at step [137/2150] that builds frontend dashboard with the error message "ninja: build stopped: subcommand failed." The last error logged in the file CMakeError.log has to do with "g++-11: error: unrecognized command-line option '-Wimplicit-const-int-float-conversion'". 

Below the last error message on the CMakeError.log: 

Performing C++ SOURCE FILE Test COMPILER_SUPPORTS_WARN_IMPLICIT_CONST_INT_FLOAT_CONVERSION failed with the following output:
Change Dir: /home/dyuan.linux/ceph/build/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/ninja cmTC_bab6d && [1/2] Building CXX object CMakeFiles/cmTC_bab6d.dir/src.cxx.o
FAILED: CMakeFiles/cmTC_bab6d.dir/src.cxx.o
/usr/bin/g++-11 -DCOMPILER_SUPPORTS_WARN_IMPLICIT_CONST_INT_FLOAT_CONVERSION  -fPIE   -Wimplicit-const-int-float-conversion -std=c++20 -o CMakeFiles/cmTC_bab6d.dir/src.cxx.o -c /home/dyuan.linux/ceph/build/CMakeFiles/CMakeTmp/src.cxx
g++-11: error: unrecognized command-line option '-Wimplicit-const-int-float-conversion'
ninja: build stopped: subcommand failed.

I think the error from CMake is not fatal. What it implies is that the compiler does not support this warning option. see the change which introduced this check: https://github.com/ceph/ceph/commit/658ecaec8ebade868799f2535bd195853f07f7f9 .  

if the build fails, the root cause could be in the cmake script which generates the building system. but the error message does not prove this hypothesis. please paste the full error from ninja, not the one in the CMakeError.log. 

I also tried to build ceph on the docker quay.io/centos/centos and got the same g++ failure. 

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--

Regards
Kefu Chai

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