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-rw-r--r--unix/mpconfigport.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/unix/mpconfigport.h b/unix/mpconfigport.h
index c6061f2254..587af23c15 100644
--- a/unix/mpconfigport.h
+++ b/unix/mpconfigport.h
@@ -232,8 +232,11 @@ extern const struct _mp_obj_fun_builtin_t mp_builtin_open_obj;
void *mmap_region_head; \
// We need to provide a declaration/definition of alloca()
+// unless support for it is disabled.
+#if !defined(MICROPY_NO_ALLOCA) || MICROPY_NO_ALLOCA == 0
#ifdef __FreeBSD__
#include <stdlib.h>
#else
#include <alloca.h>
#endif
+#endif