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-rw-r--r--external/libtommath/clang-cl.patch16
1 files changed, 16 insertions, 0 deletions
diff --git a/external/libtommath/clang-cl.patch b/external/libtommath/clang-cl.patch
new file mode 100644
index 000000000..1cc92d380
--- /dev/null
+++ b/external/libtommath/clang-cl.patch
@@ -0,0 +1,16 @@
+--- tommath.h
++++ tommath.h
+@@ -15,6 +15,13 @@
+ #ifndef BN_H_
+ #define BN_H_
+
++// Work around clang-cl issue when mp_word is a typedef for unsigned __int128, see
++// <https://bugs.llvm.org/show_bug.cgi?id=25305> "Clang-cl generates a call to an undefined symbol
++// _udivti3":
++#if defined _WIN32 && defined __clang__
++#define MP_8BIT
++#endif
++
+ #include <stdio.h>
+ #include <stdlib.h>
+ #include <stdint.h>