diff -rupN MapServer-rel-8-0-1/CMakeLists.txt MapServer-rel-8-0-1-new/CMakeLists.txt
--- MapServer-rel-8-0-1/CMakeLists.txt	2023-04-17 19:26:04.000000000 +0200
+++ MapServer-rel-8-0-1-new/CMakeLists.txt	2023-10-03 22:50:49.702462069 +0200
@@ -280,6 +280,7 @@ flatgeobuf/packedrtree.cpp
 include_directories(flatgeobuf/include)
 
 #add_definitions(-DHASH_DEBUG=1)
+add_definitions(-D_DEFAULT_SOURCE)
 if(WIN32)
   set(REGEX_SOURCES ${REGEX_DIR}/regex.c)
   include_directories(${REGEX_DIR})