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-rw-r--r--llvm_mode/afl-clang-fast.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/llvm_mode/afl-clang-fast.c b/llvm_mode/afl-clang-fast.c
index cdb22cb9..fa76a11e 100644
--- a/llvm_mode/afl-clang-fast.c
+++ b/llvm_mode/afl-clang-fast.c
@@ -401,7 +401,9 @@ static void edit_params(u32 argc, char **argv, char **envp) {
 
   }
 
-  if (getenv("AFL_NO_BUILTIN")) {
+  if (getenv("AFL_NO_BUILTIN") || (instrument_mode == INSTRUMENT_LTO &&
+                                   (getenv("AFL_LLVM_LTO_AUTODICTIONARY") ||
+                                    getenv("AFL_LLVM_AUTODICTIONARY")))) {
 
     cc_params[cc_par_cnt++] = "-fno-builtin-strcmp";
     cc_params[cc_par_cnt++] = "-fno-builtin-strncmp";