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-rw-r--r--lib/nimbase.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/nimbase.h b/lib/nimbase.h
index a83bd3006..e4dec0dd2 100644
--- a/lib/nimbase.h
+++ b/lib/nimbase.h
@@ -547,7 +547,7 @@ static inline void GCGuard (void *ptr) { asm volatile ("" :: "X" (ptr)); }
 #endif
 
 // Test to see if Nim and the C compiler agree on the size of a pointer.
-NIM_STATIC_ASSERT(sizeof(NI) == sizeof(void*) && NIM_INTBITS == sizeof(NI)*8, "");
+NIM_STATIC_ASSERT(sizeof(NI) == sizeof(void*) && NIM_INTBITS == sizeof(NI)*8, "Pointer size mismatch between Nim and C/C++ backend. You probably need to setup the backend compiler for target CPU.");
 
 #ifdef USE_NIM_NAMESPACE
 }