From 9fbfb0d0b30e4841c79e1ccfb3ec2be7a20dcad8 Mon Sep 17 00:00:00 2001
From: "Timur A. Fatkhullin" <amirych@gmail.com>
Date: Thu, 12 Feb 2026 00:36:20 +0300
Subject: [PATCH] ...

---
 CMakeLists.txt | 42 ++++++++++++++++++++++++++----------------
 1 file changed, 26 insertions(+), 16 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d44adc0..e9abd60 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -48,6 +48,8 @@ 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 OFF)
+
     find_package(spdlog CONFIG)
     if(NOT ${spdlog_FOUND})
         message(STATUS "\tfetch spdlog-lib ...")
@@ -62,7 +64,10 @@ if(USE_SPDLOG)
             "-DSPDLOG_USE_STD_FORMAT=ON -DSPDLOG_FMT_EXTERNAL=OFF"
             OVERRIDE_FIND_PACKAGE
         )
+
         find_package(spdlog REQUIRED CONFIG)
+
+        set(USE_SPDLOG_SYSTEM ON)
     endif()
 endif()
 
@@ -152,6 +157,8 @@ endif()
 if(USE_ASIO)
     pkg_check_modules(ASIOLIB IMPORTED_TARGET GLOBAL asio)
 
+    set(USE_ASIO_SYSTEM ON)
+
     if(NOT ASIOLIB_FOUND)
         message(STATUS "\tfetch asio-lib ...")
 
@@ -165,22 +172,25 @@ if(USE_ASIO)
         )
 
         FetchContent_MakeAvailable(asiolib_project)
+
+        execute_process(
+            WORKING_DIRECTORY ${asiolib_project_SOURCE_DIR}/asio
+            COMMAND ./autogen.sh
+        )
+
+        execute_process(
+            WORKING_DIRECTORY ${asiolib_project_SOURCE_DIR}/asio
+            COMMAND ./configure --prefix=${asiolib_project_SOURCE_DIR}/asio
+        )
+
+        set(ENV{PKG_CONFIG_PATH} "${asiolib_project_SOURCE_DIR}/asio")
+        pkg_check_modules(ASIOLIB IMPORTED_TARGET GLOBAL asio)
+
+        message(STATUS "ASIO INC PATHS: ${ASIOLIB_INCLUDE_DIRS}")
+
+        set(USE_ASIO_SYSTEM OFF)
+
     endif()
-
-    execute_process(
-        WORKING_DIRECTORY ${asiolib_project_SOURCE_DIR}/asio
-        COMMAND ./autogen.sh
-    )
-
-    execute_process(
-        WORKING_DIRECTORY ${asiolib_project_SOURCE_DIR}/asio
-        COMMAND ./configure --prefix=${asiolib_project_SOURCE_DIR}/asio
-    )
-
-    set(ENV{PKG_CONFIG_PATH} "${asiolib_project_SOURCE_DIR}/asio")
-    pkg_check_modules(ASIOLIB IMPORTED_TARGET GLOBAL asio)
-
-    message(STATUS "ASIO INC PATHS: ${ASIOLIB_INCLUDE_DIRS}")
 endif()
 
 if(USE_BSPLINE_PCM)
@@ -254,7 +264,7 @@ if(USE_ASIO)
 endif()
 
 if(USE_SPDLOG)
-    target_link_libraries(${PROJECT_NAME} INTERFACE spdlog::spdlog)
+    target_link_libraries(${PROJECT_NAME} INTERFACE spdlog::spdlog_header_only)
 endif()
 
 if(BUILD_TESTS)