From 9f31886711addbcb4d9be314b82bb3177a7e38ca Mon Sep 17 00:00:00 2001
From: ymd-stella <7959916+ymd-stella@users.noreply.github.com>
Date: Mon, 18 Sep 2023 20:00:33 +0900
Subject: [PATCH] Use spdlog on system if available (#165)

---
 CMakeLists.txt     | 9 +++++++--
 src/CMakeLists.txt | 4 ++++
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5cdfaab..6316a87 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -153,8 +153,13 @@ include_directories(${EIGEN3_INCLUDE_DIR})
 find_package(yaml-cpp REQUIRED)
 
 # spdlog
-set(spdlog_INCLUDE_DIR ${PROJECT_SOURCE_DIR}/3rd/spdlog/include)
-include_directories(${spdlog_INCLUDE_DIR})
+find_package(spdlog QUIET)
+if(spdlog_FOUND)
+  message(STATUS "Use spdlog on system: ${spdlog_VERSION}")
+else()
+  set(spdlog_INCLUDE_DIR ${PROJECT_SOURCE_DIR}/3rd/spdlog/include)
+  include_directories(${spdlog_INCLUDE_DIR})
+endif()
 
 # filesystem
 set(filesystem_INCLUDE_DIR ${PROJECT_SOURCE_DIR}/3rd/filesystem/include)
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index d393d63..a5266b9 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -51,4 +51,8 @@ foreach(EXECUTABLE_TARGET IN LISTS EXECUTABLE_TARGETS)
     target_link_libraries(${EXECUTABLE_TARGET} PRIVATE
         yaml-cpp)
 
+    if(spdlog_FOUND)
+        target_link_libraries(${EXECUTABLE_TARGET} PRIVATE
+        spdlog::spdlog)
+    endif()
 endforeach()