Solaris fixes for new spdlog regression

Author: gershnik

cmake/dependencies.cmake

@@ -112,6 +112,9 @@ fetch_dependency(fmt)
 set(SPDLOG_NO_ATOMIC_LEVELS ON CACHE BOOL "prevent spdlog from using of std::atomic log levels (use only if your code never modifies log levels concurrently)")
 set(SPDLOG_NO_TLS ON CACHE BOOL "prevent spdlog from using thread local storage")
 set(SPDLOG_FMT_EXTERNAL ON CACHE BOOL "Use external fmt library instead of bundled")
+if (NOT HAVE_TM_TM_GMTOFF)
+    set(SPDLOG_NO_TZ_OFFSET ON CACHE BOOL "Omit %z timezone offset (use on platforms without tm_gmtoff)")
+endif()
 fetch_dependency(spdlog)
 
 fetch_dependency(tomlplusplus)

cmake/detect_system.cmake

@@ -62,6 +62,8 @@ if (NOT HAVE_NETLINK)
 endif()
 
 check_struct_has_member("struct sockaddr" "sa_len" "sys/types.h;sys/socket.h" HAVE_SOCKADDR_SA_LEN)
+check_struct_has_member("struct tm" "tm_gmtoff" "time.h" HAVE_TM_TM_GMTOFF)
+
 
 check_include_files(execinfo.h HAVE_EXECINFO_H)
 check_library_exists(execinfo backtrace "" HAVE_EXECINFO_LIB)