From dc77f98db0ef4a67ee8330555ccc590be566ef63 Mon Sep 17 00:00:00 2001
From: "Timur A. Fatkhullin" <timur@sao.ru>
Date: Wed, 1 Apr 2026 08:46:55 +0300
Subject: [PATCH] force SPDLOG-library fetching (do not use of system one)

---
 CMakeLists.txt | 61 +++++++++++++++++++++++++++++---------------------
 1 file changed, 35 insertions(+), 26 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 72a6b61..03270bc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -72,34 +72,40 @@ endif()
 # ******* SPDLOG LIBRARY *******
 
 if(USE_SPDLOG)
-    set(SPDLOG_USE_STD_FORMAT ON CACHE INTERNAL "Use of C++20 std::format")
-    set(SPDLOG_FMT_EXTERNAL OFF CACHE INTERNAL "Turn off external fmt library")
-
     set(USE_SPDLOG_SYSTEM ON)
 
-    find_package(spdlog CONFIG)
-    if(NOT ${spdlog_FOUND})
-        message(STATUS "\tfetch spdlog-lib ...")
-        FetchContent_Declare(
-            spdlog
-            GIT_REPOSITORY "https://github.com/gabime/spdlog.git"
-            GIT_TAG "v1.15.1"
-            GIT_SHALLOW TRUE
-            GIT_SUBMODULES ""
-            GIT_PROGRESS TRUE
-            # CMAKE_ARGS
-            # -DSPDLOG_USE_STD_FORMAT=ON
-            # -DSPDLOG_FMT_EXTERNAL=OFF
-            OVERRIDE_FIND_PACKAGE
-        )
+    # find_package(spdlog CONFIG NO_MODULE)
+    # if(NOT ${spdlog_FOUND})
+    message(STATUS "\tfetch spdlog-lib ...")
+    FetchContent_Declare(
+        spdlog
+        GIT_REPOSITORY "https://github.com/gabime/spdlog.git"
+        GIT_TAG "v1.15.1"
+        GIT_SHALLOW TRUE
+        GIT_SUBMODULES ""
+        GIT_PROGRESS TRUE
+        # CMAKE_ARGS
+        # -DSPDLOG_USE_STD_FORMAT=ON
+        # -DSPDLOG_FMT_EXTERNAL=OFF
+        OVERRIDE_FIND_PACKAGE
+    )
 
-        set(SPDLOG_INSTALL ON CACHE BOOL "Enable spdlog installation" FORCE)
-        FetchContent_MakeAvailable(spdlog)
+    set(SPDLOG_USE_STD_FORMAT ON CACHE INTERNAL "Use of C++20 std::format")
+    set(SPDLOG_FMT_EXTERNAL OFF CACHE INTERNAL "Turn off external fmt library")
+    set(SPDLOG_INSTALL ON CACHE BOOL "Enable spdlog installation" FORCE)
+    FetchContent_MakeAvailable(spdlog)
 
-        find_package(spdlog REQUIRED CONFIG)
+    # find_package(spdlog REQUIRED CONFIG)
 
-        set(USE_SPDLOG_SYSTEM OFF)
-    endif()
+    set(USE_SPDLOG_SYSTEM OFF)
+    # else()
+    #     set(SPDLOG_USE_STD_FORMAT ON CACHE INTERNAL "Use of C++20 std::format")
+    #     set(SPDLOG_FMT_EXTERNAL
+    #         OFF
+    #         CACHE INTERNAL
+    #         "Turn off external fmt library"
+    #     )
+    # endif()
 endif()
 
 # ******* ERFA LIBRARY *******
@@ -312,12 +318,15 @@ if(USE_ASIO)
 endif()
 
 if(USE_SPDLOG)
-    target_link_libraries(${PROJECT_NAME} INTERFACE spdlog::spdlog_header_only)
-    # target_compile_definitions(${PROJECT_NAME} INTERFACE SPDLOG_USE_STD_FORMAT=1 SPDLOG_FMT_EXTERNAL=0)
     target_compile_definitions(
         ${PROJECT_NAME}
-        INTERFACE SPDLOG_USE_STD_FORMAT=1
+        INTERFACE SPDLOG_USE_STD_FORMAT=1 SPDLOG_FMT_EXTERNAL=0
     )
+    target_link_libraries(${PROJECT_NAME} INTERFACE spdlog::spdlog_header_only)
+    # target_compile_definitions(
+    #     ${PROJECT_NAME}
+    #     INTERFACE SPDLOG_USE_STD_FORMAT=1
+    # )
 endif()
 
 if(BUILD_TESTS)