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-rw-r--r--backends/platform/dc/portdefs.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/backends/platform/dc/portdefs.h b/backends/platform/dc/portdefs.h
index cedfd5c0fe..08bc900e6e 100644
--- a/backends/platform/dc/portdefs.h
+++ b/backends/platform/dc/portdefs.h
@@ -37,3 +37,6 @@
#ifdef Timer
#undef Timer
#endif
+/* newlib ctype.h defines _X for hex digit flag.
+ This conflicts with the use of _X as a variable name. */
+#undef _X