13 #if !defined(SPDLOG_FMT_EXTERNAL) 15 #ifndef FMT_HEADER_ONLY 16 #define FMT_HEADER_ONLY 18 #ifndef FMT_USE_WINDOWS_H 19 #define FMT_USE_WINDOWS_H 0 21 #include "bundled/format.h" 22 #if defined(SPDLOG_FMT_PRINTF) 23 #include "bundled/printf.h" 26 #else // external fmtlib 28 #include <fmt/format.h> 29 #if defined(SPDLOG_FMT_PRINTF) 30 #include <fmt/printf.h>