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-rw-r--r--gcc/ada/gnat_ugn.texi5
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diff --git a/gcc/ada/gnat_ugn.texi b/gcc/ada/gnat_ugn.texi
index f48a55fdf9d..d45ee0fa858 100644
--- a/gcc/ada/gnat_ugn.texi
+++ b/gcc/ada/gnat_ugn.texi
@@ -10702,6 +10702,11 @@ system, you can set up a procedure where you use @command{gnatchop} each
time you compile, regarding the source files that it writes as temporary
files that you throw away.
+Note that if your file containing multiple units starts with a byte order
+mark (BOM) specifying UTF-8 encoding, then the files generated by gnatchop
+will each start with a copy of this BOM, meaning that they can be compiled
+automatically in UTF-8 mode without needing to specify an explicit encoding.
+
@node Operating gnatchop in Compilation Mode
@section Operating gnatchop in Compilation Mode