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-rw-r--r--Cryptlib/Library/BaseLib.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/Cryptlib/Library/BaseLib.h b/Cryptlib/Library/BaseLib.h
index 93d5c691..94b25c93 100644
--- a/Cryptlib/Library/BaseLib.h
+++ b/Cryptlib/Library/BaseLib.h
@@ -1,3 +1,19 @@
+#if defined(__x86_64__)
+/* shim.h will check if the compiler is new enough in some other CU */
+
+#if !defined(GNU_EFI_USE_EXTERNAL_STDARG)
+#define GNU_EFI_USE_EXTERNAL_STDARG
+#endif
+
+#if !defined(GNU_EFI_USE_MS_ABI)
+#define GNU_EFI_USE_MS_ABI
+#endif
+
+#ifdef NO_BUILTIN_VA_FUNCS
+#undef NO_BUILTIN_VA_FUNCS
+#endif
+#endif
+
#include <efi.h>
#include <efilib.h>