From bd7b27eb18cdaf6255cfaa3d0bcadda4489f0158 Mon Sep 17 00:00:00 2001
From: cdemeyer-teachx <cdemeyer@teachx.ai>
Date: Sun, 31 Aug 2025 14:36:26 +0900
Subject: [PATCH] fix thread compilation issue for windows

---
 demos/CMakeLists.txt        |  7 +++++--
 demos/sudoku/CMakeLists.txt | 14 ++++++++++++--
 2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/demos/CMakeLists.txt b/demos/CMakeLists.txt
index 9986095..96e8170 100644
--- a/demos/CMakeLists.txt
+++ b/demos/CMakeLists.txt
@@ -10,9 +10,12 @@ target_include_directories(sudoku_demo_renderer PRIVATE
     ${CMAKE_CURRENT_SOURCE_DIR}/..
 )
 
-# Link pthread for std::thread
+# Link threading library for std::thread (platform-specific)
+set(THREADS_PREFER_PTHREAD_FLAG ON)
 find_package(Threads REQUIRED)
-target_link_libraries(sudoku_demo_renderer Threads::Threads)
+if(Threads_FOUND)
+    target_link_libraries(sudoku_demo_renderer Threads::Threads)
+endif()
 
 # Set C++17 standard
 set_target_properties(sudoku_demo_renderer PROPERTIES
diff --git a/demos/sudoku/CMakeLists.txt b/demos/sudoku/CMakeLists.txt
index e7a5241..ae2f7f2 100644
--- a/demos/sudoku/CMakeLists.txt
+++ b/demos/sudoku/CMakeLists.txt
@@ -35,6 +35,10 @@ else()
     message(WARNING "Google Benchmark not found. Benchmarks will not be built.")
 endif()
 
+# Find threading library for platform-specific threading support
+set(THREADS_PREFER_PTHREAD_FLAG ON)
+find_package(Threads)
+
 # Create the main executable
 add_executable(sudoku_demo
     main.cpp
@@ -119,7 +123,10 @@ if(HAS_GTEST)
         test_sudoku.cpp
     )
 
-    target_link_libraries(sudoku_tests GTest::gtest GTest::gtest_main nd-wfc pthread)
+    target_link_libraries(sudoku_tests GTest::gtest GTest::gtest_main nd-wfc)
+    if(Threads_FOUND)
+        target_link_libraries(sudoku_tests Threads::Threads)
+    endif()
 
     # Set test output directory
     set_target_properties(sudoku_tests PROPERTIES
@@ -142,7 +149,10 @@ if(HAS_BENCHMARK)
         benchmark_sudoku.cpp
     )
 
-    target_link_libraries(sudoku_benchmarks benchmark::benchmark nd-wfc pthread)
+    target_link_libraries(sudoku_benchmarks benchmark::benchmark nd-wfc)
+    if(Threads_FOUND)
+        target_link_libraries(sudoku_benchmarks Threads::Threads)
+    endif()
 
     # Set benchmark output directory
     set_target_properties(sudoku_benchmarks PROPERTIES