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-rw-r--r--include/ctype.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/ctype.h b/include/ctype.h
index 78c839976..4b73111fd 100644
--- a/include/ctype.h
+++ b/include/ctype.h
@@ -42,6 +42,7 @@ __BEGIN_DECLS
If there get to be more than 16 distinct characteristics,
__ctype_mask_t will need to be adjusted. */
+/* libstdc++ from gcc toolchain needs this macro. */
# define _ISbit(bit) (1 << (bit))
enum