diff --git a/.gitmodules b/.gitmodules
index b58552b..20dc557 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -13,7 +13,7 @@
 	url = https://github.com/Timerix22/imgui.git
     branch = docking_cbuild
 [submodule "imgui-node-editor"]
-	path = dependencies/imgui-node-editor
+	path = dependencies/imgui_node_editor
 	url = https://github.com/Timerix22/imgui-node-editor.git
     branch = develop_cbuild
 [submodule "imnodes"]
diff --git a/Makefile b/Makefile
index 9da40d9..97e64fa 100644
--- a/Makefile
+++ b/Makefile
@@ -12,6 +12,31 @@ build_exec: rebuild_all # profile
 build_exec_dbg:
 	@cbuild/call_task.sh build_exec_dbg 2>&1 | tee make_raw.log
 
+######################################
+######   Rebuild dependencies  #######
+######################################
+
+# recompile kerep.a in the next build task
+rebuild_kerep: 
+	@cbuild/rebuild_dep.sh libkerep.a 2>&1 | tee make_raw.log
+
+# recompile imgui.a in the next build task
+rebuild_imgui: 
+	@cbuild/rebuild_dep.sh libimgui.a 2>&1 | tee make_raw.log
+
+rebuild_imgui_node_editor:
+	@cbuild/rebuild_dep.sh libimgui-node-editor.a 2>&1 | tee make_raw.log
+
+rebuild_imnodes:
+	@cbuild/rebuild_dep.sh libimnodes.a 2>&1 | tee make_raw.log
+
+# writes ttf fonts fron ./fonts/ to C compressed arrays in C source files
+# builds static library from font arrays definitions
+embed_fonts:
+	@cbuild/call_task.sh embed_fonts
+
+rebuild_all: rebuild_kerep rebuild_imgui rebuild_imgui_node_editor rebuild_imnodes embed_fonts
+
 ######################################
 ######       Launch tasks      #######
 ######################################
@@ -33,10 +58,18 @@ profile:
 	@cbuild/call_task.sh profile 2>&1 | tee make_raw.log
 
 # compiles program with -pg and runs it with gprof
-# uses gprof2dot python script to generate function call tree  
+# uses gprof2dot python script to generate function call tree (pip install gprof2dot)
+# requires graphviz (https://www.graphviz.org/download/source/)
 gprof:
 	@cbuild/call_task.sh gprof 2>&1 | tee make_raw.log
-	
+
+# compiles program and runs it with callgrind (part of valgrind)
+# uses gprof2dot python script to generate function call tree (pip install gprof2dot)
+# requires graphviz (https://www.graphviz.org/download/source/)
+# P.S. detailed results can be viewed in KCacheGrind
+callgrind:
+	@cbuild/call_task.sh callgrind 2>&1 | tee make_raw.log
+
 # compiles executable with sanitizers and executes it to find errors and warnings
 sanitize:
 	@cbuild/call_task.sh sanitize 2>&1 | tee make_raw.log
@@ -59,23 +92,3 @@ fix_log:
 		| sed 's/  H  //g' \
 		| sed 's/\[3gH  //g' \
 		> make_fixed.log
-
-# recompile kerep.a in the next build task
-rebuild_kerep: 
-	@tasks/rebuild_lib.sh kerep
-
-# recompile imgui.a in the next build task
-rebuild_imgui: 
-	@tasks/rebuild_lib.sh imgui
-
-rebuild_imgui-node-editor:
-	@tasks/rebuild_lib.sh imgui-node-editor
-rebuild_imnodes:
-	@tasks/rebuild_lib.sh imnodes
-
-# writes ttf fonts fron ./fonts/ to C compressed arrays in C source files
-# builds static library from font arrays definitions
-embed_fonts:
-	@cbuild/call_task.sh embed_fonts
-
-rebuild_all: rebuild_kerep rebuild_imgui rebuild_imgui-node-editor rebuild_imnodes embed_fonts
diff --git a/cbuild b/cbuild
index 60fa8c1..574ce6e 160000
--- a/cbuild
+++ b/cbuild
@@ -1 +1 @@
-Subproject commit 60fa8c11c2673a10f8afbe37bcea13c9be3317b8
+Subproject commit 574ce6eab3b65e05888adad95a0211f532dd1125
diff --git a/default.config b/default.config
index 6d829ca..b85ecb1 100644
--- a/default.config
+++ b/default.config
@@ -1,6 +1,6 @@
 #!/bin/bash
-CBUILD_VERSION=6
-CONFIG_VERSION=4
+CBUILD_VERSION=7
+CONFIG_VERSION=6
 
 PROJECT="GraphC"
 CMP_C="gcc"
@@ -14,6 +14,19 @@ SRC_CPP="$(find src -name '*.cpp')"
 #TESTS_C="$(  find tests -name '*.c')"
 #TESTS_CPP="$(find tests -name '*.cpp')"
 
+# dir with dependeicy dirs
+DEPS_BASEDIR="dependencies"
+# EXAMPLE: "dependency_dir='build_task out_dir lib_file'
+#            other_depndency_dir=..."
+# Dependencies must be declared on separate lines
+# Values can be override by resetting one of dependencies:
+#   DEPS="$DEPS
+#         dependency_dir='...'"
+DEPS="kerep='build_static_lib bin libkerep.a'
+    imgui='build_static_lib bin libimgui.a'
+    imnodes='build_static_lib bin libimnodes.a'
+    imgui_node_editor='build_static_lib bin libimgui-node-editor.a'"
+
 # OBJDIR structure:
 #  ├── objects  - dir where compiled *.o files are stored. cleans every call of build task
 #  ├── profile  - dir where gcc *.gcda profiling info files stored
@@ -26,13 +39,13 @@ OUTDIR="bin"
 case "$OS" in
     WINDOWS)
         EXEC_FILE="$PROJECT.exe"
-        INCLUDE="-I./imgui -I/usr/include/SDL2"
-        LINKER_LIBS="-L./$OBJDIR/libs/ -lSDL2 -lopengl32"
+        INCLUDE="-I./dependencies/imgui -I./dependencies/SDL2/include"
+        LINKER_LIBS="-L./$OBJDIR/libs/ -lSDL2 -lopengl32 -lpthread -lws2_32"
         ;;
     LINUX)
         EXEC_FILE="$PROJECT"
-        INCLUDE="-I./imgui -I/usr/include/SDL2"
-        LINKER_LIBS="-lSDL2 -lGL"
+        INCLUDE="-I./dependencies/imgui -I./dependencies/SDL2/include"
+        LINKER_LIBS="-L./$OBJDIR/libs/ -lSDL2 -lGL"
         ;;
     *)
         error "operating system $OS has no configuration variants"
@@ -126,11 +139,28 @@ case "$TASK" in
         POST_TASK_SCRIPT=cbuild/default_tasks/exec.sh
         DEPS_BUILD_TASK=build_static_lib
         ;;
+    # compiles program and runs it with callgrind (part of valgrind)
+    # uses gprof2dot python script to generate function call tree (pip install gprof2dot)
+    # requires graphviz (https://www.graphviz.org/download/source/)
+    # P.S. detailed results can be viewed in KCacheGrind
+    callgrind)
+        OUTDIR="$OUTDIR/callgrind"
+        # -pg adds code to executable, that generates file containing function call info (gmon.out)
+        C_ARGS="-O2 -flto=auto -fuse-linker-plugin"
+        CPP_ARGS="$C_ARGS"
+        LINKER_ARGS="$CPP_ARGS"
+        PRE_TASK_SCRIPT=tasks/pre_build.sh
+        TASK_SCRIPT=cbuild/default_tasks/build_exec.sh
+        POST_TASK_SCRIPT=cbuild/default_tasks/callgrind.sh
+        ;;
     # deletes generated files
     clean)
         TASK_SCRIPT=cbuild/default_tasks/clean.sh
         POST_TASK_SCRIPT=tasks/clean_additions.sh
         ;;
+    # nothing to do
+    no_task)
+        ;;
     # unknown task
     *)
         error "task <$TASK> not found"
diff --git a/dependencies/imgui b/dependencies/imgui
index 109735a..00263d9 160000
--- a/dependencies/imgui
+++ b/dependencies/imgui
@@ -1 +1 @@
-Subproject commit 109735a0d10c55d95c569bae2aa4c2adbfcf9056
+Subproject commit 00263d9c22ab255d1886493c7f058d9e22128dd3
diff --git a/dependencies/imgui-node-editor b/dependencies/imgui-node-editor
deleted file mode 160000
index 50ba284..0000000
--- a/dependencies/imgui-node-editor
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 50ba2846746af233922da40694380fd090b304ab
diff --git a/dependencies/imgui_node_editor b/dependencies/imgui_node_editor
new file mode 160000
index 0000000..50f3936
--- /dev/null
+++ b/dependencies/imgui_node_editor
@@ -0,0 +1 @@
+Subproject commit 50f39362c22fb7d21312adb07cea66d56da3166a
diff --git a/dependencies/imnodes b/dependencies/imnodes
index 1bff83f..83af906 160000
--- a/dependencies/imnodes
+++ b/dependencies/imnodes
@@ -1 +1 @@
-Subproject commit 1bff83fbd0fe749b28df5af6844ec0e036320305
+Subproject commit 83af9066dbf8dceef44009ef21ac1d6d042db2a3
diff --git a/dependencies/kerep b/dependencies/kerep
index 53cf987..dd5788f 160000
--- a/dependencies/kerep
+++ b/dependencies/kerep
@@ -1 +1 @@
-Subproject commit 53cf9875e6785a30b2313cf294acb89061a92713
+Subproject commit dd5788f72a909b602592da7861ba717d529be9f3
diff --git a/src/gui/gui.h b/src/gui/gui.h
index c4a0f60..7e0e8b6 100644
--- a/src/gui/gui.h
+++ b/src/gui/gui.h
@@ -4,7 +4,7 @@
 extern "C" {
 #endif
 
-#include "../../kerep/src/base/base.h"
+#include "../../dependencies/kerep/src/base/base.h"
 
 Maybe main_window_open(const char* window_title);
 Maybe main_window_loop_start();
diff --git a/src/gui/gui_internal.hpp b/src/gui/gui_internal.hpp
index 01078b3..b45300f 100644
--- a/src/gui/gui_internal.hpp
+++ b/src/gui/gui_internal.hpp
@@ -1,12 +1,12 @@
 #pragma once
 
 #include "gui.h"
-#include "SDL2/SDL.h"
-#include "SDL2/SDL_opengl.h"
-#include "../../imgui/imgui.h"
-#include "../../imgui/backends/imgui_impl_sdl2.h"
-#include "../../imgui/backends/imgui_impl_opengl3.h"
-#include "../../kerep/src/Filesystem/filesystem.h"
+#include "../../dependencies/SDL2/include/SDL.h"
+#include "../../dependencies/SDL2/include/SDL_opengl.h"
+#include "../../dependencies/imgui/imgui.h"
+#include "../../dependencies/imgui/backends/imgui_impl_sdl2.h"
+#include "../../dependencies/imgui/backends/imgui_impl_opengl3.h"
+#include "../../dependencies/kerep/src/Filesystem/filesystem.h"
 
 //////////////////////////////////////
 //              Fonts               //
diff --git a/src/gui/node_editor.cpp_ b/src/gui/node_editor.cpp_
index 9885f3c..82a3288 100644
--- a/src/gui/node_editor.cpp_
+++ b/src/gui/node_editor.cpp_
@@ -1,5 +1,5 @@
 #include "gui_internal.hpp"
-#include "../../imgui-node-editor/imgui_node_editor.h"
+#include "../../dependencies/imgui_node_editor/imgui_node_editor.h"
 namespace NE = ax::NodeEditor;
 
 NE::EditorContext* editor_context=nullptr;
diff --git a/src/gui/node_editor2.cpp b/src/gui/node_editor2.cpp
index 2ffc191..57e4ff8 100644
--- a/src/gui/node_editor2.cpp
+++ b/src/gui/node_editor2.cpp
@@ -1,5 +1,5 @@
 #include "gui_internal.hpp"
-#include "../../imnodes/imnodes.h"
+#include "../../dependencies/imnodes/imnodes.h"
 #include <vector>
 #include <algorithm>
 
diff --git a/src/main.c b/src/main.c
index 72e481e..67f4445 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,4 +1,4 @@
-#include "../kerep/src/base/base.h"
+#include "../dependencies/kerep/src/base/base.h"
 #include "gui/gui.h"
 
 void kt_initGraphCTypes(){
@@ -9,7 +9,7 @@ int main(const int argc, const char* const* argv){
     if(setlocale(LC_CTYPE, "C.UTF-8")!=0)
         kprintf("\e[93msetlocale failed!\n");
 
-    kt_beginInit();
+    kt_beginInit(true);
     kt_initKerepTypes();
     kt_initGraphCTypes();
     kt_endInit();
@@ -19,9 +19,9 @@ int main(const int argc, const char* const* argv){
         kprintf(" %s", argv[i]);
     kprintf("\n");
 
-    tryLast(main_window_open("GraphC"),_1);
-    tryLast(main_window_loop_start(),_2);
-    tryLast(main_window_close(),_3);
+    tryLast(main_window_open("GraphC"),_1, ;);
+    tryLast(main_window_loop_start(),_2, ;);
+    tryLast(main_window_close(),_3, ;);
 
     kt_free();
     return 0;
diff --git a/tasks/clean_additions.sh b/tasks/clean_additions.sh
index 4c59ad6..c20e009 100644
--- a/tasks/clean_additions.sh
+++ b/tasks/clean_additions.sh
@@ -1,6 +1,4 @@
 #!/usr/bin/bash
-for tmpfile in $(ls -a | grep -e '\.rebuild.*\.tmp'); do
-    try_delete_dir_or_file "$tmpfile"
-done
+
 try_delete_dir_or_file fonts/generated
 try_delete_dir_or_file libs/fonts_embedded.a
diff --git a/tasks/embed_fonts.sh b/tasks/embed_fonts.sh
index 240d9cd..b526fcc 100644
--- a/tasks/embed_fonts.sh
+++ b/tasks/embed_fonts.sh
@@ -1,5 +1,4 @@
 #!/bin/bash
-
 cd fonts
 SRC_C=""
 HEADER="generated/fonts_embedded.h"
@@ -30,17 +29,12 @@ mkdir -p src/generated/
 cp -v fonts/$HEADER src/$HEADER
 myprint "${GREEN}font arrays external definitions have been written to ${CYAN}src/$HEADER"
 
+# delete old objects
 clean_dir "$OBJDIR/objects"
-myprint "${BLUE}hiding libs"
-mv "$OBJDIR/libs" "$OBJDIR/libs_"
-mkdir -p "$OBJDIR/libs"
 # compiling
 compile_c "$C_ARGS" "$SRC_C"
 pack_static_lib "$STATIC_LIB_FILE"
-rm -rf $OUTDIR/fonts_embedded.a
-myprint "${BLUE}restoring libs"
-rm -rf "$OBJDIR/libs"
-mv "$OBJDIR/libs_" "$OBJDIR/libs"
-
-cp "$OBJDIR/out/fonts_embedded.a" libs/
-myprint "$OBJDIR/out/fonts_embedded.a -> libs/"
+# moving lib file
+mv "$OUTDIR/$STATIC_LIB_FILE" libs/
+mkdir -p "libs"
+myprint "$OUTDIR/$STATIC_LIB_FILE -> libs/"
diff --git a/tasks/pre_build.sh b/tasks/pre_build.sh
index dd9d65c..579e4bd 100644
--- a/tasks/pre_build.sh
+++ b/tasks/pre_build.sh
@@ -1,35 +1,11 @@
 #!/bin/bash
 
-# if $lib_project.a doesn't exist or rebuild_* task was executed, builds static lib
-function handle_static_dependency {
-    local lib_project="$1"
-    local lib_build_task="$2"
-    if [ ! -f "$OBJDIR/libs/$lib_project.a" ] || [ -f .rebuild_$lib_project.tmp ]; then
-        [[ -z "$lib_build_task" ]] && error "lib_build_task is empty" 
-        myprint "${BLUE}making $lib_project task <$lib_build_task>"
-
-        cd $lib_project
-        if ! make "$lib_build_task"; then
-            exit 1
-        fi
-        cd ..
-
-        cp $lib_project/bin/$lib_project.a $OBJDIR/libs/
-        myprint "${GREEN}copied ${CYAN}$lib_project.a"
-        rm -f .rebuild_$lib_project.tmp
-    fi
-}
-
+# compile fonts
 if [ ! -f libs/fonts_embedded.a ]; then
     if ! make embed_fonts; then
         exit 1
     fi
 fi
 
-handle_static_dependency kerep $DEPS_BUILD_TASK
-handle_static_dependency imgui $DEPS_BUILD_TASK
-handle_static_dependency imgui-node-editor $DEPS_BUILD_TASK
-handle_static_dependency imnodes $DEPS_BUILD_TASK
-
 # copy all precompiled libs
 cp libs/* $OBJDIR/libs/
diff --git a/tasks/rebuild_lib.sh b/tasks/rebuild_lib.sh
deleted file mode 100644
index 3c62a17..0000000
--- a/tasks/rebuild_lib.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-source cbuild/colors.sh
-source cbuild/functions.sh
-touch ".rebuild_$1.tmp"
-myprint "${YELLOW}$1.a will be rebuilt in the next build task"