diff --git a/.gitignore b/.gitignore
index 71520c4..a6e9ce7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -53,3 +53,5 @@ Module.symvers
 Mkfile.old
 dkms.conf
 
+PoissonSolver/2D-seq/.cache/clangd/index
+PoissonSolver/2D-seq/compile_commands.json
diff --git a/PoissonSolver/2D-seq/.clangd b/PoissonSolver/2D-seq/.clangd
new file mode 100644
index 0000000..176d6aa
--- /dev/null
+++ b/PoissonSolver/2D-seq/.clangd
@@ -0,0 +1,3 @@
+CompileFlags:
+  Add: [-D_GNU_SOURCE,-DANIMATE,-DARRAY_ALIGNMENT=64,-I./src/includes,-I./CLANG, -Ofast,-std=c99, -xc]
+  Compiler: clang
diff --git a/PoissonSolver/2D-seq/Makefile b/PoissonSolver/2D-seq/Makefile
index 53fcb50..095b573 100644
--- a/PoissonSolver/2D-seq/Makefile
+++ b/PoissonSolver/2D-seq/Makefile
@@ -21,8 +21,16 @@ VPATH     = $(SRC_DIR)
 ASM       = $(patsubst $(SRC_DIR)/%.c, $(BUILD_DIR)/%.s,$(wildcard $(SRC_DIR)/*.c))
 OBJ       = $(patsubst $(SRC_DIR)/%.c, $(BUILD_DIR)/%.o,$(wildcard $(SRC_DIR)/*.c))
 CPPFLAGS := $(CPPFLAGS) $(DEFINES) $(OPTIONS) $(INCLUDES)
+c := ,
+clist = $(subst $(eval) ,$c,$(strip $1))
 
-${TARGET}: $(BUILD_DIR) $(OBJ)
+define CLANGD_TEMPLATE
+CompileFlags:
+  Add: [$(call clist,$(CPPFLAGS)), $(call clist,$(CFLAGS)), -xc]
+  Compiler: clang
+endef
+
+${TARGET}: $(BUILD_DIR) .clangd $(OBJ)
 	$(info ===>  LINKING  $(TARGET))
 	$(Q)${LINKER} ${LFLAGS} -o $(TARGET) $(OBJ) $(LIBS)
 
@@ -59,4 +67,7 @@ tags:
 $(BUILD_DIR):
 	@mkdir $(BUILD_DIR)
 
+.clangd:
+	$(file > .clangd,$(CLANGD_TEMPLATE))
+
 -include $(OBJ:.o=.d)
diff --git a/PoissonSolver/2D-seq/config.mk b/PoissonSolver/2D-seq/config.mk
index 17f876a..f411253 100644
--- a/PoissonSolver/2D-seq/config.mk
+++ b/PoissonSolver/2D-seq/config.mk
@@ -1,8 +1,10 @@
-# Supported: GCC, CLANG, ICC
-TAG ?= CLANG
+# Supported: CLANG, CLANG, ICX
+TAG ?= GCC
 
 #Feature options
-OPTIONS +=  -DARRAY_ALIGNMENT=64
-#OPTIONS +=  -DVERBOSE_AFFINITY
-#OPTIONS +=  -DVERBOSE_DATASIZE
-#OPTIONS +=  -DVERBOSE_TIMER
+OPTIONS += -DARRAY_ALIGNMENT=64
+#OPTIONS += -DANIMATE
+#OPTIONS += -DDEBUG
+#OPTIONS += -DVERBOSE_AFFINITY
+#OPTIONS += -DVERBOSE_DATASIZE
+#OPTIONS += -DVERBOSE_TIMER
diff --git a/PoissonSolver/2D-seq/include_CLANG.mk b/PoissonSolver/2D-seq/include_CLANG.mk
index 0d8a1ce..070960a 100644
--- a/PoissonSolver/2D-seq/include_CLANG.mk
+++ b/PoissonSolver/2D-seq/include_CLANG.mk
@@ -9,10 +9,7 @@ LIBS     = # -lomp
 endif
 
 VERSION  = --version
-CFLAGS   = -Ofast -std=c99 $(OPENMP)
-#CFLAGS   = -Ofast -fnt-store=aggressive  -std=c99 $(OPENMP) #AMD CLANG
+CFLAGS   = -O3 -ffast-math -std=c99 $(OPENMP)
 LFLAGS   = $(OPENMP) -lm
-DEFINES  =  -D_GNU_SOURCE
-DEFINES  += -DANIMATE
-# DEFINES  += -DDEBUG
+DEFINES  = -D_GNU_SOURCE
 INCLUDES =
diff --git a/PoissonSolver/2D-seq/include_GCC.mk b/PoissonSolver/2D-seq/include_GCC.mk
index 427e798..c7489fe 100644
--- a/PoissonSolver/2D-seq/include_GCC.mk
+++ b/PoissonSolver/2D-seq/include_GCC.mk
@@ -7,8 +7,8 @@ OPENMP   = -fopenmp
 endif
 
 VERSION  = --version
-CFLAGS   = -Ofast -ffreestanding -std=c99 $(OPENMP)
+CFLAGS   = -O3 -ffast-math -ffreestanding -std=c99 $(OPENMP)
 LFLAGS   = $(OPENMP)
 DEFINES  = -D_GNU_SOURCE
 INCLUDES =
-LIBS     =
+LIBS     = -lm
diff --git a/PoissonSolver/2D-seq/include_ICC.mk b/PoissonSolver/2D-seq/include_ICX.mk
similarity index 59%
rename from PoissonSolver/2D-seq/include_ICC.mk
rename to PoissonSolver/2D-seq/include_ICX.mk
index 94b8e20..1386c29 100644
--- a/PoissonSolver/2D-seq/include_ICC.mk
+++ b/PoissonSolver/2D-seq/include_ICX.mk
@@ -1,4 +1,4 @@
-CC   = icc
+CC   = icx
 GCC  = gcc
 LINKER = $(CC)
 
@@ -7,7 +7,8 @@ OPENMP   = -qopenmp
 endif
 
 VERSION  = --version
-CFLAGS   =  -O3 -xHost -qopt-zmm-usage=high -std=c99 $(OPENMP)
+CFLAGS   =  -O3 -xHost -std=c99 $(OPENMP)
+#CFLAGS   += -qopt-zmm-usage=high #on CPUs with AVX512 support
 LFLAGS   = $(OPENMP)
 DEFINES  = -D_GNU_SOURCE
 INCLUDES =
diff --git a/PoissonSolver/2D-seq/src/parameter.c b/PoissonSolver/2D-seq/src/parameter.c
index 0dec654..0ad7614 100644
--- a/PoissonSolver/2D-seq/src/parameter.c
+++ b/PoissonSolver/2D-seq/src/parameter.c
@@ -2,12 +2,10 @@
  * All rights reserved.
  * Use of this source code is governed by a MIT-style
  * license that can be found in the LICENSE file.    */
+#include "parameter.h"
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-//---
-#include "parameter.h"
-#include "util.h"
 #define MAXLINE 4096
 
 void initParameter(Parameter* param)
@@ -35,7 +33,10 @@ void readParameter(Parameter* param, const char* filename)
 
     while (!feof(fp)) {
         line[0] = '\0';
-        fgets(line, MAXLINE, fp);
+        if (fgets(line, MAXLINE, fp) == NULL && ferror(fp) != 0) {
+            fprintf(stderr, "Error in fgets function\n");
+        }
+
         for (i = 0; line[i] != '\0' && line[i] != '#'; i++)
             ;
         line[i] = '\0';
diff --git a/PoissonSolver/2D-seq/src/solver.c b/PoissonSolver/2D-seq/src/solver.c
index 06dda9b..fd2a295 100644
--- a/PoissonSolver/2D-seq/src/solver.c
+++ b/PoissonSolver/2D-seq/src/solver.c
@@ -131,6 +131,7 @@ void solveRB(Solver* solver)
     int it        = 0;
     double res    = 1.0;
     int pass, jsw, isw;
+    char filename[20];
 
     while ((res >= epssq) && (it < itermax)) {
         res = 0.0;
@@ -198,6 +199,7 @@ void solveRBA(Solver* solver)
     double res    = 1.0;
     int pass, jsw, isw;
     double omega = 1.0;
+    char filename[20];
 
     while ((res >= epssq) && (it < itermax)) {
         res = 0.0;