From a755a86f316964f60d60c2b94791d5c91f3e4d73 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Adrian=20B=C3=B6ckenkamp?=
 <adrian.boeckenkamp@iml.fraunhofer.de>
Date: Tue, 5 Jul 2022 12:41:42 +0200
Subject: [PATCH 1/3] Fix compiler errors #if USE_BOOST_FILESYSTEM, and Boost <
 v1.72

---
 src/Inotify.cpp                             | 4 ++++
 src/include/inotify-cpp/FileSystemAdapter.h | 3 ++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/Inotify.cpp b/src/Inotify.cpp
index 9c678a4..062cbb0 100644
--- a/src/Inotify.cpp
+++ b/src/Inotify.cpp
@@ -105,7 +105,11 @@ void Inotify::watchDirectoryRecursively(fs::path path)
         if (fs::is_directory(path)) {
             inotifypp::error_code ec;
             fs::recursive_directory_iterator it(
+              #if !defined USE_BOOST_FILESYSTEM || (defined USE_BOOST_FILESYSTEM && BOOST_VERSION >= 107200)
                 path, fs::directory_options::follow_directory_symlink, ec);
+               #else
+                path, ec);
+               #endif
             fs::recursive_directory_iterator end;
 
             for (; it != end; it.increment(ec)) {
diff --git a/src/include/inotify-cpp/FileSystemAdapter.h b/src/include/inotify-cpp/FileSystemAdapter.h
index b3f7283..8383223 100644
--- a/src/include/inotify-cpp/FileSystemAdapter.h
+++ b/src/include/inotify-cpp/FileSystemAdapter.h
@@ -22,6 +22,7 @@ namespace inotifypp
 
 #include <boost/filesystem.hpp>
 #include <boost/optional.hpp>
+#include <boost/version.hpp>
 
 namespace inotifypp
 {
@@ -32,7 +33,7 @@ namespace inotifypp
     template<typename T>
     using optional = boost::optional<T>;
 
-    inline constexpr boost::none_t nullopt() { return boost::none; };
+    inline boost::none_t nullopt() { return boost::none; };
 }
 
 #endif

From 8f517e3923d57ca9412a067ffe39b6415ce5ede5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Adrian=20B=C3=B6ckenkamp?=
 <adrian.boeckenkamp@iml.fraunhofer.de>
Date: Tue, 5 Jul 2022 12:53:50 +0200
Subject: [PATCH 2/3] Add USE_BOOST_FILESYSTEM to INTERFACE library to make it
 avail to other targets

---
 CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7a73e09..5b1555f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -23,7 +23,7 @@ find_package(Boost 1.54.0 COMPONENTS ${USED_BOOST_LIBS} REQUIRED)
 
 add_library(inotify-filesystem-adapter INTERFACE)
 if(CMAKE_CXX_STANDARD LESS 17 OR USE_BOOST_FILESYSTEM)
-    add_definitions(-DUSE_BOOST_FILESYSTEM)
+    target_compile_definitions(inotify-filesystem-adapter INTERFACE USE_BOOST_FILESYSTEM)
     target_link_libraries(inotify-filesystem-adapter INTERFACE Boost::filesystem)
 else()
     target_link_libraries(inotify-filesystem-adapter INTERFACE stdc++fs)

From d355f10ac8fab0f38287015485550f0018c386f4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Adrian=20B=C3=B6ckenkamp?=
 <adrian.boeckenkamp@iml.fraunhofer.de>
Date: Tue, 5 Jul 2022 13:00:44 +0200
Subject: [PATCH 3/3] Fix making USE_BOOST_FILESYSTEM avail to targets

---
 src/CMakeLists.txt | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index cb64aea..ef2d648 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -35,6 +35,9 @@ macro(configure_target target)
                 $<INSTALL_INTERFACE:include>
                 ${Boost_INCLUDE_DIR})
         target_link_libraries(${target} PUBLIC inotify-filesystem-adapter)
+	if(CMAKE_CXX_STANDARD LESS 17 OR USE_BOOST_FILESYSTEM)
+	        target_compile_definitions(${target} PUBLIC USE_BOOST_FILESYSTEM)
+        endif()
 
 endmacro(configure_target target)