This is due to the following addition in spec:

-%cmake
+%cmake -DSPDLOG_BUILD_SHARED=ON \
+       -DSPDLOG_FMT_EXTERNAL=ON

Is there real need for having SPDLOG_FMT_EXTERNAL=ON ?

Опишите, в чём проблема у вас при сборке с новой версией spdlog.

As a result the building of lizardfs failed with the following error:

make[2]: Entering directory '/usr/src/RPM/BUILD/lizardfs-3.13.0/BUILD'
[  0%] Building CXX object src/protocol/CMakeFiles/lzfsprotocol.dir/packet.cc.o
In file included from /usr/include/spdlog/common.h:38,
                 from /usr/include/spdlog/spdlog.h:12,
                 from /usr/src/RPM/BUILD/lizardfs-3.13.0/src/common/slogger.h:29,
                 from /usr/src/RPM/BUILD/lizardfs-3.13.0/src/common/massert.h:28,
                 from /usr/src/RPM/BUILD/lizardfs-3.13.0/src/common/serialization.h:37,
                 from /usr/src/RPM/BUILD/lizardfs-3.13.0/src/protocol/packet.h:28,
                 from /usr/src/RPM/BUILD/lizardfs-3.13.0/src/protocol/packet.cc:20:
/usr/include/spdlog/fmt/fmt.h:22:10: fatal error: spdlog/fmt/bundled/core.h: No such file or directory
   22 | #include <spdlog/fmt/bundled/core.h>
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
make[2]: *** [src/protocol/CMakeFiles/lzfsprotocol.dir/build.make:63: src/protocol/CMakeFiles/lzfsprotocol.dir/packet.cc.o] Error 1

  From /usr/include/spdlog/fmt/fmt.h: 
  
#if !defined(SPDLOG_FMT_EXTERNAL)
#ifdef SPDLOG_HEADER_ONLY
#ifndef FMT_HEADER_ONLY
#define FMT_HEADER_ONLY
#endif
#endif
#ifndef FMT_USE_WINDOWS_H
#define FMT_USE_WINDOWS_H 0
#endif
#include <spdlog/fmt/bundled/core.h>
#include <spdlog/fmt/bundled/format.h>
#else // SPDLOG_FMT_EXTERNAL is defined - use external fmtlib
#include <fmt/core.h>
#include <fmt/format.h>
#endif

  The problem caused by missed definition of macros SPDLOG_FMT_EXTERNAL, which should be probably defined in libspdlog-devel includes when built with external libfmt. 

  There is /usr/include/spdlog/tweakme.h with SPDLOG_FMT_EXTERNAL comment out.

  If define SPDLOG_FMT_EXTERNAL while building lizardfs, the compilation succeeds. But it is not the right solution, isn't it?

(Ответ для Andrew Vasilyev на комментарий #3)
...
>   There is /usr/include/spdlog/tweakme.h with SPDLOG_FMT_EXTERNAL comment
> out.
> 
>   If define SPDLOG_FMT_EXTERNAL while building lizardfs, the compilation
> succeeds. But it is not the right solution, isn't it?
Хорошо, я проверяю, чтобы этот макрос был раскомментирован в пакете.

spdlog-1.5.0-alt2 -> sisyphus:

 Thu Jan 30 2020 Vitaly Lipatov <lav@altlinux.ru> 1.5.0-alt2
 - patch tweakme.h to use external libfmt for the library clients (ALT bug 37969)

  Спасибо!