From 83d5f3dbadb54290bc8cd69dd35b126bd2b999f8 Mon Sep 17 00:00:00 2001
From: gabime <gmelman1@gmail.com>
Date: Sat, 21 Oct 2023 13:56:34 +0300
Subject: [PATCH] Revert 70f7a8252d0a4284d7d05c305648798843f50d23

---
 example/example.cpp     |  2 +-
 include/spdlog/common.h | 10 ++++++++--
 tests/test_errors.cpp   |  6 +++---
 3 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/example/example.cpp b/example/example.cpp
index 16c0e3aa9..1b74f6d1e 100644
--- a/example/example.cpp
+++ b/example/example.cpp
@@ -170,7 +170,7 @@ void async_example() {
 // {:n} - don't split the output to lines.
 
 #if !defined SPDLOG_USE_STD_FORMAT || defined(_MSC_VER)
-#include "spdlog/fmt/bin_to_hex.h"
+    #include "spdlog/fmt/bin_to_hex.h"
 void binary_example() {
     std::vector<char> buf(80);
     for (int i = 0; i < 80; i++) {
diff --git a/include/spdlog/common.h b/include/spdlog/common.h
index 1f09040be..191e6ec0e 100644
--- a/include/spdlog/common.h
+++ b/include/spdlog/common.h
@@ -42,8 +42,14 @@
 
 #include "fmt/fmt.h"
 
-#if defined(SPDLOG_WCHAR_FILENAMES) && !defined(SPDLOG_USE_STD_FORMAT)
-    #include "fmt/xchar.h"
+#if !defined(SPDLOG_USE_STD_FORMAT) && \
+    FMT_VERSION >= 80000  // backward compatibility with fmt versions older than 8
+    #define SPDLOG_FMT_RUNTIME(format_string) fmt::runtime(format_string)
+    #if defined(SPDLOG_WCHAR_FILENAMES)
+        #include "fmt/xchar.h"
+    #endif
+#else
+    #define SPDLOG_FMT_RUNTIME(format_string) format_string
 #endif
 
 #ifndef SPDLOG_FUNCTION
diff --git a/tests/test_errors.cpp b/tests/test_errors.cpp
index 5b2d7abc8..448cb7b2f 100644
--- a/tests/test_errors.cpp
+++ b/tests/test_errors.cpp
@@ -27,7 +27,7 @@ TEST_CASE("default_error_handler", "[errors]") {
 
     auto logger = spdlog::create<spdlog::sinks::basic_file_sink_mt>("test-error", filename, true);
     logger->set_pattern("%v");
-    logger->info("Test message {} {}", 1);
+    logger->info(SPDLOG_FMT_RUNTIME("Test message {} {}"), 1);
     logger->info("Test message {}", 2);
     logger->flush();
     using spdlog::details::os::default_eol;
@@ -43,7 +43,7 @@ TEST_CASE("custom_error_handler", "[errors]") {
     logger->set_error_handler([=](const std::string &) { throw custom_ex(); });
     logger->info("Good message #1");
 
-    REQUIRE_THROWS_AS(logger->info("Bad format msg {} {}", "xxx"), custom_ex);
+    REQUIRE_THROWS_AS(logger->info(SPDLOG_FMT_RUNTIME("Bad format msg {} {}"), "xxx"), custom_ex);
     logger->info("Good message #2");
     require_message_count(SIMPLE_LOG, 2);
 }
@@ -81,7 +81,7 @@ TEST_CASE("async_error_handler", "[errors]") {
             ofs << err_msg;
         });
         logger->info("Good message #1");
-        logger->info("Bad format msg {} {}", "xxx");
+        logger->info(SPDLOG_FMT_RUNTIME("Bad format msg {} {}"), "xxx");
         logger->info("Good message #2");
         spdlog::drop("logger");  // force logger to drain the queue and shutdown
     }