Initial import of libdpf.

Co-authored-by: Cursor <cursoragent@cursor.com>

thirdparty/hedley/test/unknown-cpp-attributes.c

@@ -0,0 +1,26 @@
+#include "../hedley.h"
+
+#include <stdio.h>
+
+#if defined(__cplusplus)
+#  if __cplusplus >= 201103L
+#    define UNPREDICTABLE \
+       HEDLEY_DIAGNOSTIC_PUSH \
+       HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_CPP_ATTRIBUTES \
+       HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_([[unpredictable]]) \
+       HEDLEY_DIAGNOSTIC_POP
+#  endif
+#endif
+#if !defined(UNPREDICTABLE)
+#  define UNPREDICTABLE
+#endif
+
+int main(int argc, char* argv[]) {
+  HEDLEY_STATIC_CAST(void, argv);
+
+  if (argc == 1) UNPREDICTABLE {
+    return -1;
+  }
+
+  return 0;
+}