commit 5864f397ccad30f6e73221b90bdac57a303b9752
Author: Andrey Semashev <andrey.semashev@gmail.com>
Date:   Fri Aug 12 12:59:56 2022 +0300

    Fixed a missing include on POSIX systems that don't support *at APIs.
    
    Fixes https://github.com/boostorg/filesystem/issues/250.

diff --git a/libs/filesystem/src/operations.cpp b/libs/filesystem/src/operations.cpp
index ca2fff3..e22967e 100644
--- a/libs/filesystem/src/operations.cpp
+++ b/libs/filesystem/src/operations.cpp
@@ -70,7 +70,7 @@
 
 #include <unistd.h>
 #include <fcntl.h>
-#if _POSIX_C_SOURCE < 200809L
+#if !defined(BOOST_FILESYSTEM_HAS_POSIX_AT_APIS)
 #include <utime.h>
 #endif
 #include <limits.h>