diff --git a/CMakeLists.txt b/CMakeLists.txt
index 57e986c96..5076f0a9b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,5 @@
-cmake_minimum_required (VERSION 2.8.11)
+cmake_minimum_required (VERSION 2.8.12)
+
 project (vectorscan C CXX)
 
 set (HS_MAJOR_VERSION 5)
@@ -296,6 +297,12 @@ if (NOT RELEASE_BUILD)
     # release builds
     set(EXTRA_C_FLAGS "${EXTRA_C_FLAGS} -Werror")
     set(EXTRA_CXX_FLAGS "${EXTRA_CXX_FLAGS} -Werror")
+    if (CMAKE_COMPILER_IS_CLANG)
+	if (CMAKE_C_COMPILER_VERSION VERSION_GREATER "13.0")
+           set(EXTRA_C_FLAGS "${EXTRA_C_FLAGS} -Wno-unused-but-set-variable")
+           set(EXTRA_CXX_FLAGS "${EXTRA_CXX_FLAGS} -Wno-unused-but-set-variable")
+        endif()
+    endif()
 endif()
 
 if (DISABLE_ASSERTS)
diff --git a/src/nfa/mcclellancompile.cpp b/src/nfa/mcclellancompile.cpp
index 055920b29..d1afcbcc6 100644
--- a/src/nfa/mcclellancompile.cpp
+++ b/src/nfa/mcclellancompile.cpp
@@ -1484,12 +1484,12 @@ bytecode_ptr<NFA> mcclellanCompile_i(raw_dfa &raw, accel_dfa_build_strat &strat,
             find_wide_state(info);
         }
 
-        u16 total_daddy = 0;
         bool any_cyclic_near_anchored_state
             = is_cyclic_near(raw, raw.start_anchored);
 
         // Sherman optimization
         if (info.impl_alpha_size > 16) {
+            u16 total_daddy = 0;
             for (u32 i = 0; i < info.size(); i++) {
                 if (info.is_widestate(i)) {
                     continue;
diff --git a/src/nfagraph/ng_misc_opt.cpp b/src/nfagraph/ng_misc_opt.cpp
index d0f1f029a..2b898cf76 100644
--- a/src/nfagraph/ng_misc_opt.cpp
+++ b/src/nfagraph/ng_misc_opt.cpp
@@ -385,8 +385,7 @@ bool improveGraph(NGHolder &g, som_type som) {
 
     const vector<NFAVertex> ordering = getTopoOrdering(g);
 
-    return enlargeCyclicCR(g, som, ordering)
-        | enlargeCyclicCR_rev(g, ordering);
+    return enlargeCyclicCR(g, som, ordering) || enlargeCyclicCR_rev(g, ordering);
 }
 
 /** finds a smaller reachability for a state by the reverse transformation of
diff --git a/src/rose/rose_build_add.cpp b/src/rose/rose_build_add.cpp
index dc9ee3088..82f0e2e02 100644
--- a/src/rose/rose_build_add.cpp
+++ b/src/rose/rose_build_add.cpp
@@ -216,9 +216,9 @@ RoseRoleHistory selectHistory(const RoseBuildImpl &tbi, const RoseBuildData &bd,
     const bool fixed_offset_src = g[u].fixedOffset();
     const bool has_bounds = g[e].minBound || (g[e].maxBound != ROSE_BOUND_INF);
 
-    DEBUG_PRINTF("edge %zu->%zu, bounds=[%u,%u], fixed_u=%d, prefix=%d\n",
+    /*DEBUG_PRINTF("edge %zu->%zu, bounds=[%u,%u], fixed_u=%d, prefix=%d\n",
                  g[u].index, g[v].index, g[e].minBound, g[e].maxBound,
-                 (int)g[u].fixedOffset(), (int)g[v].left);
+                 (int)g[u].fixedOffset(), (int)g[v].left);*/
 
     if (g[v].left) {
         // Roles with prefix engines have their history handled by that prefix.
diff --git a/src/util/arch/ppc64el/simd_utils.h b/src/util/arch/ppc64el/simd_utils.h
index ea1766b26..119d0946f 100644
--- a/src/util/arch/ppc64el/simd_utils.h
+++ b/src/util/arch/ppc64el/simd_utils.h
@@ -152,7 +152,7 @@ static really_inline u32 movemask128(m128 a) {
    static uint8x16_t perm = { 16, 24, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
    uint8x16_t bitmask = vec_gb((uint8x16_t) a);
    bitmask = (uint8x16_t) vec_perm(vec_splat_u8(0), bitmask, perm);
-   u32 movemask;
+   u32 ALIGN_ATTR(16) movemask;
    vec_ste((uint32x4_t) bitmask, 0, &movemask);
    return movemask;
 }
@@ -285,27 +285,27 @@ m128 loadbytes128(const void *ptr, unsigned int n) {
     return a;
 }
 
-#define CASE_ALIGN_VECTORS(a, b, offset)  case offset: return (m128)vec_sld((int8x16_t)(b), (int8x16_t)(a), (16 - offset)); break;
+#define CASE_ALIGN_VECTORS(a, b, offset)  case offset: return (m128)vec_sld((int8x16_t)(a), (int8x16_t)(b), (16 - offset)); break;
 
 static really_really_inline
 m128 palignr_imm(m128 r, m128 l, int offset) {
     switch (offset) {
     case 0: return l; break;
-    CASE_ALIGN_VECTORS(l, r, 1);
-    CASE_ALIGN_VECTORS(l, r, 2);
-    CASE_ALIGN_VECTORS(l, r, 3);
-    CASE_ALIGN_VECTORS(l, r, 4);
-    CASE_ALIGN_VECTORS(l, r, 5);
-    CASE_ALIGN_VECTORS(l, r, 6);
-    CASE_ALIGN_VECTORS(l, r, 7);
-    CASE_ALIGN_VECTORS(l, r, 8);
-    CASE_ALIGN_VECTORS(l, r, 9);
-    CASE_ALIGN_VECTORS(l, r, 10);
-    CASE_ALIGN_VECTORS(l, r, 11);
-    CASE_ALIGN_VECTORS(l, r, 12);
-    CASE_ALIGN_VECTORS(l, r, 13);
-    CASE_ALIGN_VECTORS(l, r, 14);
-    CASE_ALIGN_VECTORS(l, r, 15);
+    CASE_ALIGN_VECTORS(r, l, 1);
+    CASE_ALIGN_VECTORS(r, l, 2);
+    CASE_ALIGN_VECTORS(r, l, 3);
+    CASE_ALIGN_VECTORS(r, l, 4);
+    CASE_ALIGN_VECTORS(r, l, 5);
+    CASE_ALIGN_VECTORS(r, l, 6);
+    CASE_ALIGN_VECTORS(r, l, 7);
+    CASE_ALIGN_VECTORS(r, l, 8);
+    CASE_ALIGN_VECTORS(r, l, 9);
+    CASE_ALIGN_VECTORS(r, l, 10);
+    CASE_ALIGN_VECTORS(r, l, 11);
+    CASE_ALIGN_VECTORS(r, l, 12);
+    CASE_ALIGN_VECTORS(r, l, 13);
+    CASE_ALIGN_VECTORS(r, l, 14);
+    CASE_ALIGN_VECTORS(r, l, 15);
     case 16: return r; break;
     default: return zeroes128(); break;
     } 
diff --git a/src/util/supervector/arch/ppc64el/impl.cpp b/src/util/supervector/arch/ppc64el/impl.cpp
index 2eba69b2d..494bcbd69 100644
--- a/src/util/supervector/arch/ppc64el/impl.cpp
+++ b/src/util/supervector/arch/ppc64el/impl.cpp
@@ -49,7 +49,7 @@ really_inline SuperVector<16>::SuperVector(SuperVector const &other)
 
 template<>
 template<>
-really_inline SuperVector<16>::SuperVector(char __bool __vector v)
+really_inline SuperVector<16>::SuperVector(__vector __bool char v)
 {
     u.u8x16[0] = (uint8x16_t) v;
 };
@@ -269,10 +269,10 @@ really_inline SuperVector<16> SuperVector<16>::eq(SuperVector<16> const &b) cons
 template <>
 really_inline typename SuperVector<16>::comparemask_type
 SuperVector<16>::comparemask(void) const {
-    uint8x16_t bitmask = vec_gb( u.u8x16[0]);
     static uint8x16_t perm = { 16, 24, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
+    uint8x16_t bitmask = vec_gb(u.u8x16[0]);
     bitmask = (uint8x16_t) vec_perm(vec_splat_u8(0), bitmask, perm);
-    u32 movemask;
+    u32 ALIGN_ATTR(16) movemask;
     vec_ste((uint32x4_t) bitmask, 0, &movemask);
     return movemask;
 }
diff --git a/src/util/supervector/arch/x86/impl.cpp b/src/util/supervector/arch/x86/impl.cpp
index c9daf0cf1..49fbee99d 100644
--- a/src/util/supervector/arch/x86/impl.cpp
+++ b/src/util/supervector/arch/x86/impl.cpp
@@ -523,9 +523,7 @@ template <>
 really_inline SuperVector<16> SuperVector<16>::loadu_maskz(void const *ptr, uint8_t const len)
 {
     SuperVector mask = Ones_vshr(16 -len);
-    mask.print8("mask");
     SuperVector v = _mm_loadu_si128((const m128 *)ptr);
-    v.print8("v");
     return mask & v;
 }