Don't search for third party libraries while using MSan

[oota-llvm.git] / cmake / config-ix.cmake

diff --git a/cmake/config-ix.cmake b/cmake/config-ix.cmake
index c9ad80e6122c6d7ca2cc93b5da6140755763b74d..c984a19e85f56811501158082feb291a5f45d304 100755 (executable)
--- a/cmake/config-ix.cmake
+++ b/cmake/config-ix.cmake
@@ -105,6 +105,12 @@ if( NOT PURE_WINDOWS )
   endif()
   check_library_exists(dl dlopen "" HAVE_LIBDL)
   check_library_exists(rt clock_gettime "" HAVE_LIBRT)
+endif()
+
+# Don't look for these libraries on Windows. Also don't look for them if we're
+# using MSan, since uninstrmented third party code may call MSan interceptors
+# like strlen, leading to false positives.
+if( NOT PURE_WINDOWS AND NOT LLVM_USE_SANITIZER MATCHES "Memory.*")
   if (LLVM_ENABLE_ZLIB)
     check_library_exists(z compress2 "" HAVE_LIBZ)
   else()