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-rw-r--r--gcc/defaults.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/gcc/defaults.h b/gcc/defaults.h
index 1597d52a97c..702800ad7ab 100644
--- a/gcc/defaults.h
+++ b/gcc/defaults.h
@@ -293,6 +293,11 @@ do { \
#define CHAR_TYPE_SIZE BITS_PER_UNIT
#endif
+#ifndef BOOL_TYPE_SIZE
+/* `bool' has size and alignment `1', on almost all platforms. */
+#define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
+#endif
+
#ifndef SHORT_TYPE_SIZE
#define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
#endif