From ef10c23842780d55e36b5838987a9987ed73e804 Mon Sep 17 00:00:00 2001
From: Thomas Krijnen <t.krijnen@gmail.com>
Date: Thu, 28 Aug 2025 15:23:19 +0200
Subject: [PATCH] -lstdc++fs on gcc < 9

---
 cmake/CMakeLists.txt | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/cmake/CMakeLists.txt b/cmake/CMakeLists.txt
index 503a5cc9be..fd08532b0b 100644
--- a/cmake/CMakeLists.txt
+++ b/cmake/CMakeLists.txt
@@ -1038,8 +1038,15 @@ endforeach()
 
 set(IFCPARSE_FILES ${IFCPARSE_CPP_FILES} ${IFCPARSE_H_FILES})
 
+if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
+    if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 9.0)
+        message(STATUS "GCC < 9 detected, linking stdc++fs explicitly")
+        set(STDCPPFS stdc++fs)
+    endif()
+endif()
+
 add_library(IfcParse ${IFCPARSE_FILES})
-target_link_libraries(IfcParse ${ROCKSDB_LIBRARY} ${RPCRT_LIBRARIES})
+target_link_libraries(IfcParse ${ROCKSDB_LIBRARY} ${RPCRT_LIBRARIES} ${STDCPPFS})
 set_target_properties(IfcParse PROPERTIES COMPILE_FLAGS -DIFC_PARSE_EXPORTS VERSION "${PROJECT_VERSION}" SOVERSION "${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}")
 
 if(WASM_BUILD)