diff --git a/cmake/simde.cmake b/cmake/simde.cmake
index 0ac52832..4cd56bad 100644
--- a/cmake/simde.cmake
+++ b/cmake/simde.cmake
@@ -10,6 +10,10 @@ if (SIMDE_SSE42_H_FOUND)
   if (CMAKE_COMPILER_IS_CLANG)
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DSIMDE_NO_CHECK_IMMEDIATE_CONSTANT")
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DSIMDE_NO_CHECK_IMMEDIATE_CONSTANT")
+    if (ARCH_PPC64EL)
+        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-deprecated-altivec-src-compat")
+        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-deprecated-altivec-src-compat")
+    endif()
   endif()
 
   if (SIMDE_NATIVE)
diff --git a/unit/CMakeLists.txt b/unit/CMakeLists.txt
index d1134b15..83eb4d66 100644
--- a/unit/CMakeLists.txt
+++ b/unit/CMakeLists.txt
@@ -29,6 +29,10 @@ if(CMAKE_COMPILER_IS_GNUCC)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-array-bounds")
 endif()
 
+if(CMAKE_COMPILER_IS_CLANG)
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-pass-failed")
+endif()
+
 add_definitions(-DGTEST_HAS_PTHREAD=0 -DSRCDIR=${PROJECT_SOURCE_DIR})
 
 set(unit_hyperscan_SOURCES