add #warning to make it more obvious what versions of functions are used

src/fs_attr.cpp

@@ -15,7 +15,9 @@
 */
 
 #ifdef __linux__
+#warning "using fs_attr_linux.icpp"
 #include "fs_attr_linux.icpp"
 #else
+#warning "using fs_attr_unsupported.icpp"
 #include "fs_attr_unsupported.icpp"
 #endif

src/fs_copy_file_range.cpp

@@ -17,7 +17,9 @@
 */
 
 #ifdef __linux__
+#warning "using fs_copy_file_range_linux.icpp"
 #include "fs_copy_file_range_linux.icpp"
 #else
+#warning "using fs_copy_file_range_unsupported.icpp"
 #include "fs_copy_file_range_unsupported.icpp"
 #endif

src/fs_fadvise.cpp

@@ -17,8 +17,10 @@
 #include <fcntl.h>
 
 #if _XOPEN_SOURCE >= 600 || _POSIX_C_SOURCE >= 200112L
+#warning "using fs_fadvise_posix.icpp"
 #include "fs_fadvise_posix.icpp"
 #else
+#warning "using fs_fadvise_unsupported.icpp"
 #include "fs_fadvise_unsupported.icpp"
 #endif
 

src/fs_ficlone.cpp

@@ -17,7 +17,9 @@
 */
 
 #ifdef __linux__
+#warning "using fs_ficlone_linux.icpp"
 #include "fs_ficlone_linux.icpp"
 #else
+#warning "using fs_ficlone_unsupported.icpp"
 #include "fs_ficlone_unsupported.icpp"
 #endif

src/fs_futimens.hpp

@@ -23,10 +23,13 @@
 #include <sys/stat.h>
 
 #ifdef __linux__
+#warning "using fs_futimens_linux.hpp"
 #include "fs_futimens_linux.hpp"
 #elif __FreeBSD__ >= 11
+#warning "using fs_futimens_freebsd_11.hpp"
 #include "fs_futimens_freebsd_11.hpp"
 #else
+#warning "using fs_futimens_generic.hpp"
 #include "fs_futimens_generic.hpp"
 #endif
 

src/fs_futimesat.cpp

@@ -17,7 +17,9 @@
 */
 
 #if __APPLE__
+#warning "using fs_futimesat_osx.icpp"
 #include "fs_futimesat_osx.icpp"
 #else
+#warning "using fs_futimesat_generic.icpp"
 #include "fs_futimesat_generic.icpp"
 #endif

src/fs_sendfile.cpp

@@ -15,7 +15,9 @@
 */
 
 #ifdef __linux__
+#warning "using fs_sendfile_linux.icpp"
 #include "fs_sendfile_linux.icpp"
 #else
+#warning "using fs_sendfile_unsupported.icpp"
 #include "fs_sendfile_unsupported.icpp"
 #endif

src/fs_utimensat.hpp

@@ -19,9 +19,12 @@
 #pragma once
 
 #ifdef __linux__
+#warning "using fs_utimensat_linux.hpp"
 #include "fs_utimensat_linux.hpp"
 #elif __FreeBSD__
+#warning "using fs_utimensat_freebsd.hpp"
 #include "fs_utimensat_freebsd.hpp"
 #else
+#warning "using fs_utimensat_generic.hpp"
 #include "fs_utimensat_generic.hpp"
 #endif

src/ugid.hpp

@@ -28,7 +28,9 @@ namespace ugid
 }
 
 #if defined __linux__ and UGID_USE_RWLOCK == 0
+#warning "using ugid_linux.hpp"
 #include "ugid_linux.hpp"
 #else
+#warning "using ugid_rwlock.hpp"
 #include "ugid_rwlock.hpp"
 #endif