diff --git a/crengine/src/hyphman.cpp b/crengine/src/hyphman.cpp
index fd30f7efb..397e55bd6 100644
--- a/crengine/src/hyphman.cpp
+++ b/crengine/src/hyphman.cpp
@@ -1103,7 +1103,6 @@ bool AlgoHyph::hyphenate( const lChar32 * str, int len, lUInt16 * widths, lUInt8
     if ( len > WORD_LENGTH-2 )
         len = WORD_LENGTH - 2;
     lStr_getCharProps( str, len, chprops );
-    bool res = false;
 
     int min = len+1;
     int nb_visible = 0;
diff --git a/crengine/src/lvdocview.cpp b/crengine/src/lvdocview.cpp
index 6eca8d971..89379d54f 100644
--- a/crengine/src/lvdocview.cpp
+++ b/crengine/src/lvdocview.cpp
@@ -136,7 +136,9 @@ static css_font_family_t DEFAULT_FONT_FAMILY = css_ff_sans_serif;
 /// minimum EM width of page (prevents show two pages for windows that not enougn wide)
 #define MIN_EM_PER_PAGE     20
 
+#if USE_LIMITED_FONT_SIZES_SET
 static int def_font_sizes[] = { 18, 20, 22, 24, 29, 33, 39, 44 };
+#endif
 
 LVDocView::LVDocView(int bitsPerPixel, bool noDefaultDocument) :
 	m_bitsPerPixel(bitsPerPixel), m_dx(400), m_dy(200), _pos(0), _page(0),
diff --git a/crengine/src/lvfntman.cpp b/crengine/src/lvfntman.cpp
index 26989892a..2129148f7 100644
--- a/crengine/src/lvfntman.cpp
+++ b/crengine/src/lvfntman.cpp
@@ -2880,9 +2880,13 @@ class LVFreeTypeFace : public LVFont
             hb_shape(_hb_font, _hb_buffer, _hb_features.ptr(), (unsigned int)_hb_features.length());
 
             // Harfbuzz has guessed and set a direction even if we did not provide one.
+            #ifdef DEBUG_MEASURE_TEXT
             bool is_rtl = false;
+            #endif
             if ( hb_buffer_get_direction(_hb_buffer) == HB_DIRECTION_RTL ) {
+                #ifdef DEBUG_MEASURE_TEXT
                 is_rtl = true;
+                #endif
                 // "For buffers in the right-to-left (RTL) or bottom-to-top (BTT) text
                 // flow direction, the directionality of the buffer itself is reversed
                 // for final output as a matter of design. Therefore, HarfBuzz inverts
@@ -2947,7 +2951,6 @@ class LVFreeTypeFace : public LVFont
             int cur_cluster = 0;
             int hg = 0;  // index in glyph_info/glyph_pos
             int hcl = 0; // cluster glyph at hg
-            bool is_cluster_tail = false;
             int t_notdef_start = -1;
             int t_notdef_end = -1;
             for (int t = 0; t < len; t++) {
@@ -3132,9 +3135,6 @@ class LVFreeTypeFace : public LVFont
         } // _kerningMode == KERNING_MODE_HARFBUZZ
 
         else if (_kerningMode == KERNING_MODE_HARFBUZZ_LIGHT) {
-            unsigned int glyph_count;
-            hb_glyph_info_t* glyph_info = 0;
-            hb_glyph_position_t* glyph_pos = 0;
             struct LVCharTriplet triplet;
             struct LVCharPosInfo posInfo;
             triplet.Char = 0;
@@ -3625,10 +3625,9 @@ class LVFreeTypeFace : public LVFont
             int value = 0;
             // Tables we might look at
             TT_OS2 * os2 = (TT_OS2 *)FT_Get_Sfnt_Table(_face, FT_SFNT_OS2);
-            bool has_ot_math_data = false;
 #if MATHML_SUPPORT==1
             #if USE_HARFBUZZ==1
-                has_ot_math_data = hb_ot_math_has_data(hb_font_get_face(_hb_font));
+                bool has_ot_math_data = hb_ot_math_has_data(hb_font_get_face(_hb_font));
                 #define VALUE_FROM_OT_MATH_CONSTANT(x) if ( has_ot_math_data ) { \
                         value = hb_ot_math_get_constant(_hb_font, HB_OT_MATH_CONSTANT_##x); \
                         value_set = true; }
@@ -4409,11 +4408,6 @@ class LVFreeTypeFace : public LVFont
 
         } // _kerningMode == KERNING_MODE_HARFBUZZ
         else if (_kerningMode == KERNING_MODE_HARFBUZZ_LIGHT) {
-            hb_glyph_info_t *glyph_info = 0;
-            hb_glyph_position_t *glyph_pos = 0;
-            unsigned int glyph_count;
-            int w;
-            unsigned int len_new = 0;
             struct LVCharTriplet triplet;
             struct LVCharPosInfo posInfo;
             triplet.Char = 0;
diff --git a/crengine/src/lvpagesplitter.cpp b/crengine/src/lvpagesplitter.cpp
index b24b80c6b..b346e0b83 100644
--- a/crengine/src/lvpagesplitter.cpp
+++ b/crengine/src/lvpagesplitter.cpp
@@ -1386,12 +1386,10 @@ bool LVRendPageInfo::deserialize( SerialBuf & buf )
 
 void LVRendPageList::replacePages(int old_y, int old_h, LVRendPageList * pages, int next_pages_shift_y)
 {
-    int i = 0;
     int remove_idx = -1;
     int remove_count = 0;
     int insert_idx = -1;
     int added_count = pages->length();
-    int new_page_index_shift = 0;
     for  ( int i=0; i < length(); i++ ) {
         LVRendPageInfo * pi = ((*this)[i]);
         if ( pi->start + pi->height <= old_y ) {
diff --git a/crengine/src/lvrend.cpp b/crengine/src/lvrend.cpp
index 6a3045f8e..cb4a87b3f 100644
--- a/crengine/src/lvrend.cpp
+++ b/crengine/src/lvrend.cpp
@@ -7428,7 +7428,6 @@ void renderBlockElementEnhanced( FlowState * flow, ldomNode * enode, int x, int
         // we should compute our width from the child style, and possibly
         // from its rendered content width.
         ldomNode * child = enode->getChildNode(0);
-        lUInt16 childElementId = child->getNodeId();
         css_style_ref_t child_style = child->getStyle();
 
         // We may tweak child styles
diff --git a/crengine/src/lvstsheet.cpp b/crengine/src/lvstsheet.cpp
index d0dc84b60..ddb66c9d2 100644
--- a/crengine/src/lvstsheet.cpp
+++ b/crengine/src/lvstsheet.cpp
@@ -23,10 +23,12 @@
 //#define DUMP_CSS_PARSING
 
 // Helper to debug string parsing, showing current position and context
+#if 0
 static void dbg_str_pos(const char * prefix, const char * str) {
     printf("/----------|---------- %s\n", prefix);
     printf("\\%.*s\n", 20, str - 10);
 }
+#endif
 
 #define IMPORTANT_DECL_HIGHER   ((lUInt32)0x80000000U) // | to prop_code
 #define IMPORTANT_DECL_SET      ((lUInt32)0x40000000U) // | to prop_code
@@ -317,6 +319,7 @@ inline bool css_is_alnum( char ch )
     return ( css_is_alpha(ch) || ( ch>='0' && ch<='9' ) );
 }
 
+#if 0
 static int substr_compare( const char * sub, const char * & str )
 {
     int j;
@@ -334,6 +337,7 @@ static int substr_compare( const char * sub, const char * & str )
     }
     return 0;
 }
+#endif
 
 inline char toLower( char c )
 {
diff --git a/crengine/src/lvtextfm.cpp b/crengine/src/lvtextfm.cpp
index f081dc3b0..4d0c815ca 100644
--- a/crengine/src/lvtextfm.cpp
+++ b/crengine/src/lvtextfm.cpp
@@ -6054,7 +6054,6 @@ void LFormattedText::Draw( LVDrawBuf * buf, int x, int y, ldomMarkedRangeList *
                 for (j=0; j<frmline->word_count; j++) {
                     word = &frmline->words[j];
                     srcline = &m_pbuffer->srctext[word->src_text_index];
-                    ldomNode * node = (ldomNode *) srcline->object;
                     if (word->flags & LTEXT_WORD_IS_PAD && word->o.baseline ) { // there is some border to draw
                         bool is_right_pad = srcline->o.objflags & LTEXT_OBJECT_IS_PAD_RIGHT;
                         bool is_mirrored = word->flags & LTEXT_WORD_DIRECTION_IS_RTL; // will be drawn as if on the other side
diff --git a/crengine/src/lvtinydom.cpp b/crengine/src/lvtinydom.cpp
index a63b163aa..a8d12774a 100644
--- a/crengine/src/lvtinydom.cpp
+++ b/crengine/src/lvtinydom.cpp
@@ -5437,7 +5437,7 @@ bool ldomDocument::partialRender( ldomNode * node ) {
     lvRect new_rc;
     node->getAbsRect(new_rc);
     int orig_h = orig_rc.bottom - base_y;
-    int new_h = new_rc.bottom - base_y;
+    // int new_h = new_rc.bottom - base_y;
     int next_fragments_shift_y = new_rc.bottom - orig_rc.bottom;
     // printf("fixing fragment %d (%d ~ %d => %d , +%d => +%d)\n", node->getNodeIndex(), base_y, orig_rc.top, new_rc.top, orig_h, new_h);