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-rw-r--r--gcc/tm.texi7
1 files changed, 4 insertions, 3 deletions
diff --git a/gcc/tm.texi b/gcc/tm.texi
index 90e5e90..458b9ba 100644
--- a/gcc/tm.texi
+++ b/gcc/tm.texi
@@ -849,9 +849,10 @@ on machines that don't have byte or half-word store operations.
@findex BIGGEST_FIELD_ALIGNMENT
@item BIGGEST_FIELD_ALIGNMENT
-Biggest alignment that any structure field can require on this machine,
-in bits. If defined, this overrides @code{BIGGEST_ALIGNMENT} for
-structure fields only.
+Biggest alignment that any structure or union field can require on this
+machine, in bits. If defined, this overrides @code{BIGGEST_ALIGNMENT} for
+structure and union fields only, unless the field alignment has been set
+by the @code{__attribute__ ((aligned (@var{n})))} construct.
@findex ADJUST_FIELD_ALIGN
@item ADJUST_FIELD_ALIGN (@var{field}, @var{computed})