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-rw-r--r--ports/nrf/mpconfigport.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/ports/nrf/mpconfigport.h b/ports/nrf/mpconfigport.h
index 37fbdf1eb..6e92fa876 100644
--- a/ports/nrf/mpconfigport.h
+++ b/ports/nrf/mpconfigport.h
@@ -59,6 +59,12 @@
// options to control how MicroPython is built
+// Due to the use of LTO and the unknown distance between nlr.o and nlrthumb.o code,
+// MCUs using the Thumb 1 instruction set must enable this NLR long jump feature.
+#if defined(NRF51822)
+#define MICROPY_NLR_THUMB_USE_LONG_JUMP (1)
+#endif
+
#ifndef MICROPY_VFS
#define MICROPY_VFS (CORE_FEAT)
#endif