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-rw-r--r--llvm_mode/afl-clang-fast.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm_mode/afl-clang-fast.c b/llvm_mode/afl-clang-fast.c
index 10cb3fa3..0597ba17 100644
--- a/llvm_mode/afl-clang-fast.c
+++ b/llvm_mode/afl-clang-fast.c
@@ -371,8 +371,12 @@ static void edit_params(u32 argc, char **argv, char **envp) {
 
     if (instrument_mode == INSTRUMENT_PCGUARD) {
 
+#if LLVM_VERSION_MAJOR >= 4
       cc_params[cc_par_cnt++] =
           "-fsanitize-coverage=trace-pc-guard";  // edge coverage by default
+#else
+      FATAL("pcguard instrumentation requires llvm 4.0.1+");
+#endif
 
     } else {