diff --git a/common/Makefile b/common/Makefile
new file mode 100644
index 0000000..9f519ec
--- /dev/null
+++ b/common/Makefile
@@ -0,0 +1,71 @@
+BUILDDIR := ${current_dir}/build
+BOARD_BUILDDIR := ${BUILDDIR}/${TARGET}
+
+# Set board properties based on TARGET variable
+ifeq ($(TARGET),arty_35)
+  DEVICE := xc7a50t_test
+  BITSTREAM_DEVICE := artix7
+  PARTNAME := xc7a35tcsg324-1
+else ifeq ($(TARGET),arty_100)
+  DEVICE := xc7a100t_test
+  BITSTREAM_DEVICE := artix7
+  PARTNAME := xc7a100tcsg324-1
+else ifeq ($(TARGET),nexys4ddr)
+  DEVICE := xc7a100t_test
+  BITSTREAM_DEVICE := artix7
+  PARTNAME := xc7a100tcsg324-1
+else ifeq ($(TARGET),zybo)
+  DEVICE := xc7z010_test
+  BITSTREAM_DEVICE := zynq7
+  PARTNAME := xc7z010clg400-1
+else ifeq ($(TARGET),nexys_video)
+  DEVICE := xc7a200t_test
+  BITSTREAM_DEVICE := artix7
+  PARTNAME := xc7a200tsbg484-1
+else ifeq ($(TARGET),basys3)
+  DEVICE := xc7a50t_test
+  BITSTREAM_DEVICE := artix7
+  PARTNAME := xc7a35tcpg236-1
+else
+  $(error Unsupported board type)
+endif
+
+# Determine the type of constraint being used
+ifneq (${XDC},)
+  XDC_CMD := -x ${XDC}
+endif
+ifneq (${SDC},)
+  SDC_CMD := -s ${SDC}
+endif
+ifneq (${PCF},)
+  PCF_CMD := -p ${PCF}
+endif
+
+.DELETE_ON_ERROR:
+
+# Build design
+all: ${BOARD_BUILDDIR}/${TOP}.bit
+
+${BOARD_BUILDDIR}:
+	mkdir -p ${BOARD_BUILDDIR}
+
+${BOARD_BUILDDIR}/${TOP}.eblif: | ${BOARD_BUILDDIR}
+	cd ${BOARD_BUILDDIR} && symbiflow_synth -t ${TOP} -v ${SOURCES} -d ${BITSTREAM_DEVICE} -p ${PARTNAME} ${XDC_CMD} 2>&1 > /dev/null
+
+${BOARD_BUILDDIR}/${TOP}.net: ${BOARD_BUILDDIR}/${TOP}.eblif
+	cd ${BOARD_BUILDDIR} && symbiflow_pack -e ${TOP}.eblif -d ${DEVICE} ${SDC_CMD} 2>&1 > /dev/null
+
+${BOARD_BUILDDIR}/${TOP}.place: ${BOARD_BUILDDIR}/${TOP}.net
+	cd ${BOARD_BUILDDIR} && symbiflow_place -e ${TOP}.eblif -d ${DEVICE} ${PCF_CMD} -n ${TOP}.net -P ${PARTNAME} ${SDC_CMD} 2>&1 > /dev/null
+
+${BOARD_BUILDDIR}/${TOP}.route: ${BOARD_BUILDDIR}/${TOP}.place
+	cd ${BOARD_BUILDDIR} && symbiflow_route -e ${TOP}.eblif -d ${DEVICE} ${SDC_CMD} 2>&1 > /dev/null
+
+${BOARD_BUILDDIR}/${TOP}.fasm: ${BOARD_BUILDDIR}/${TOP}.route
+	cd ${BOARD_BUILDDIR} && symbiflow_write_fasm -e ${TOP}.eblif -d ${DEVICE}
+
+${BOARD_BUILDDIR}/${TOP}.bit: ${BOARD_BUILDDIR}/${TOP}.fasm
+	cd ${BOARD_BUILDDIR} && symbiflow_write_bitstream -d ${BITSTREAM_DEVICE} -f ${TOP}.fasm -p ${PARTNAME} -b ${TOP}.bit
+
+clean:
+	rm -rf ${BUILDDIR}
\ No newline at end of file
diff --git a/xc7/counter_test/Makefile b/xc7/counter_test/Makefile
index 07bc449..df92f1f 100644
--- a/xc7/counter_test/Makefile
+++ b/xc7/counter_test/Makefile
@@ -1,68 +1,21 @@
-mkfile_path := $(abspath $(lastword $(MAKEFILE_LIST)))
-current_dir := $(patsubst %/,%,$(dir $(mkfile_path)))
+current_dir := ${CURDIR}
 TOP := top
-VERILOG := ${current_dir}/counter.v
-DEVICE := xc7a50t_test
-BITSTREAM_DEVICE := artix7
-BUILDDIR := build
+SOURCES := ${current_dir}/counter.v
 
 ifeq ($(TARGET),arty_35)
-  PARTNAME := xc7a35tcsg324-1
   XDC := ${current_dir}/arty.xdc
-  BOARD_BUILDDIR := ${BUILDDIR}/arty_35
 else ifeq ($(TARGET),arty_100)
-  PARTNAME := xc7a100tcsg324-1
   XDC := ${current_dir}/arty.xdc
-  DEVICE := xc7a100t_test
-  BOARD_BUILDDIR := ${BUILDDIR}/arty_100
 else ifeq ($(TARGET),nexys4ddr)
-  PARTNAME := xc7a100tcsg324-1
   XDC := ${current_dir}/nexys4ddr.xdc
-  DEVICE := xc7a100t_test
-  BOARD_BUILDDIR := ${BUILDDIR}/nexys4ddr
 else ifeq ($(TARGET),zybo)
-  PARTNAME := xc7z010clg400-1
   XDC := ${current_dir}/zybo.xdc
-  DEVICE := xc7z010_test
-  BITSTREAM_DEVICE := zynq7
-  BOARD_BUILDDIR := ${BUILDDIR}/zybo
-  VERILOG:=${current_dir}/counter_zynq.v
+  SOURCES:=${current_dir}/counter_zynq.v
 else ifeq ($(TARGET),nexys_video)
-  PARTNAME := xc7a200tsbg484-1
   XDC := ${current_dir}/nexys_video.xdc
-  DEVICE := xc7a200t_test
-  BOARD_BUILDDIR := ${BUILDDIR}/nexys_video
 else
-  PARTNAME := xc7a35tcpg236-1
   XDC := ${current_dir}/basys3.xdc
-  BOARD_BUILDDIR := ${BUILDDIR}/basys3
 endif
 
-.DELETE_ON_ERROR:
+include ${current_dir}/../../common/Makefile
 
-
-all: ${BOARD_BUILDDIR}/${TOP}.bit
-
-${BOARD_BUILDDIR}:
-	mkdir -p ${BOARD_BUILDDIR}
-
-${BOARD_BUILDDIR}/${TOP}.eblif: | ${BOARD_BUILDDIR}
-	cd ${BOARD_BUILDDIR} && symbiflow_synth -t ${TOP} -v ${VERILOG} -d ${BITSTREAM_DEVICE} -p ${PARTNAME} -x ${XDC} 2>&1 > /dev/null
-
-${BOARD_BUILDDIR}/${TOP}.net: ${BOARD_BUILDDIR}/${TOP}.eblif
-	cd ${BOARD_BUILDDIR} && symbiflow_pack -e ${TOP}.eblif -d ${DEVICE} 2>&1 > /dev/null
-
-${BOARD_BUILDDIR}/${TOP}.place: ${BOARD_BUILDDIR}/${TOP}.net
-	cd ${BOARD_BUILDDIR} && symbiflow_place -e ${TOP}.eblif -d ${DEVICE} -n ${TOP}.net -P ${PARTNAME} 2>&1 > /dev/null
-
-${BOARD_BUILDDIR}/${TOP}.route: ${BOARD_BUILDDIR}/${TOP}.place
-	cd ${BOARD_BUILDDIR} && symbiflow_route -e ${TOP}.eblif -d ${DEVICE} 2>&1 > /dev/null
-
-${BOARD_BUILDDIR}/${TOP}.fasm: ${BOARD_BUILDDIR}/${TOP}.route
-	cd ${BOARD_BUILDDIR} && symbiflow_write_fasm -e ${TOP}.eblif -d ${DEVICE}
-
-${BOARD_BUILDDIR}/${TOP}.bit: ${BOARD_BUILDDIR}/${TOP}.fasm
-	cd ${BOARD_BUILDDIR} && symbiflow_write_bitstream -d ${BITSTREAM_DEVICE} -f ${TOP}.fasm -p ${PARTNAME} -b ${TOP}.bit
-
-clean:
-	rm -rf ${BUILDDIR}
diff --git a/xc7/linux_litex_demo/Makefile b/xc7/linux_litex_demo/Makefile
index 31c50e1..81f81b5 100644
--- a/xc7/linux_litex_demo/Makefile
+++ b/xc7/linux_litex_demo/Makefile
@@ -1,53 +1,10 @@
-mkfile_path := $(abspath $(lastword $(MAKEFILE_LIST)))
-current_dir := $(patsubst %/,%,$(dir $(mkfile_path)))
+current_dir := ${CURDIR}
 TOP := top
-VERILOG := ${current_dir}/baselitex_arty.v \
+SOURCES := ${current_dir}/baselitex_arty.v \
            ${current_dir}/VexRiscv_Linux.v
-MEM_INIT := ${current_dir}/mem.init \
-            ${current_dir}/mem_1.init \
-            ${current_dir}/mem_2.init
-BITSTREAM_DEVICE := artix7
+
 PCF := ${current_dir}/arty.pcf
 SDC := ${current_dir}/arty.sdc
 XDC := ${current_dir}/arty.xdc
-BUILDDIR := build
 
-ifeq ($(TARGET),arty_100)
-    PARTNAME := xc7a100tcsg324-1
-    DEVICE   := xc7a100t_test
-    BOARD_BUILDDIR := ${BUILDDIR}/arty_100
-else
-    PARTNAME := xc7a35tcsg324-1
-    DEVICE   := xc7a50t_test
-    BOARD_BUILDDIR := ${BUILDDIR}/arty_35
-endif
-
-.DELETE_ON_ERROR:
-
-
-all: ${BOARD_BUILDDIR}/${TOP}.bit
-
-${BOARD_BUILDDIR}:
-	mkdir -p ${BOARD_BUILDDIR}
-	ln -s ${MEM_INIT} ${BOARD_BUILDDIR}
-
-${BOARD_BUILDDIR}/${TOP}.eblif: | ${BOARD_BUILDDIR}
-	cd ${BOARD_BUILDDIR} && symbiflow_synth -t ${TOP} -v ${VERILOG} -d ${BITSTREAM_DEVICE} -p ${PARTNAME} -x ${XDC} 2>&1 > /dev/null
-
-${BOARD_BUILDDIR}/${TOP}.net: ${BOARD_BUILDDIR}/${TOP}.eblif
-	cd ${BOARD_BUILDDIR} && symbiflow_pack -e ${TOP}.eblif -d ${DEVICE} -s ${SDC} 2>&1 > /dev/null
-
-${BOARD_BUILDDIR}/${TOP}.place: ${BOARD_BUILDDIR}/${TOP}.net
-	cd ${BOARD_BUILDDIR} && symbiflow_place -e ${TOP}.eblif -d ${DEVICE} -p ${PCF} -n ${TOP}.net -P ${PARTNAME} -s ${SDC} 2>&1 > /dev/null
-
-${BOARD_BUILDDIR}/${TOP}.route: ${BOARD_BUILDDIR}/${TOP}.place
-	cd ${BOARD_BUILDDIR} && symbiflow_route -e ${TOP}.eblif -d ${DEVICE} -s ${SDC} 2>&1 > /dev/null
-
-${BOARD_BUILDDIR}/${TOP}.fasm: ${BOARD_BUILDDIR}/${TOP}.route
-	cd ${BOARD_BUILDDIR} && symbiflow_write_fasm -e ${TOP}.eblif -d ${DEVICE}
-
-${BOARD_BUILDDIR}/${TOP}.bit: ${BOARD_BUILDDIR}/${TOP}.fasm
-	cd ${BOARD_BUILDDIR} && symbiflow_write_bitstream -d ${BITSTREAM_DEVICE} -f ${TOP}.fasm -p ${PARTNAME} -b ${TOP}.bit
-
-clean:
-	rm -rf ${BUILDDIR}
+include ${current_dir}/../../common/Makefile 
\ No newline at end of file
diff --git a/xc7/picosoc_demo/Makefile b/xc7/picosoc_demo/Makefile
index cf01292..c39fdf7 100644
--- a/xc7/picosoc_demo/Makefile
+++ b/xc7/picosoc_demo/Makefile
@@ -1,66 +1,24 @@
-mkfile_path := $(abspath $(lastword $(MAKEFILE_LIST)))
-current_dir := $(patsubst %/,%,$(dir $(mkfile_path)))
+current_dir := ${CURDIR}
 TOP := top
-VERILOG := ${current_dir}/picosoc_noflash.v \
+SOURCES := ${current_dir}/picosoc_noflash.v \
            ${current_dir}/picorv32.v \
            ${current_dir}/simpleuart.v \
            ${current_dir}/progmem.v
-PARTNAME := xc7a35tcpg236-1
-DEVICE  := xc7a50t_test
-BITSTREAM_DEVICE := artix7
-PCF := ${current_dir}/basys3.pcf
+
 SDC := ${current_dir}/picosoc.sdc
-BUILDDIR := build
 
 ifeq ($(TARGET),arty_35)
-  VERILOG += ${current_dir}/arty.v
-  PARTNAME := xc7a35tcsg324-1
+  SOURCES += ${current_dir}/arty.v
   PCF := ${current_dir}/arty.pcf
-  BOARD_BUILDDIR := ${BUILDDIR}/arty_35
 else ifeq ($(TARGET),arty_100)
-  VERILOG += ${current_dir}/arty.v
-  PARTNAME := xc7a100tcsg324-1
-  PCF:=${current_dir}/arty.pcf
-  DEVICE := xc7a100t_test
-  BOARD_BUILDDIR := ${BUILDDIR}/arty_100
+  SOURCES += ${current_dir}/arty.v
+  PCF := ${current_dir}/arty.pcf
 else ifeq ($(TARGET),nexys4ddr)
-  VERILOG += ${current_dir}/nexys4ddr.v
-  PARTNAME := xc7a100tcsg324-1
-  PCF:=${current_dir}/nexys4ddr.pcf
-  DEVICE := xc7a100t_test
-  BOARD_BUILDDIR := ${BUILDDIR}/nexys4ddr
+  SOURCES += ${current_dir}/nexys4ddr.v
+  PCF := ${current_dir}/nexys4ddr.pcf
 else
-  VERILOG += ${current_dir}/basys3.v
-  PARTNAME := xc7a35tcpg236-1
+  SOURCES += ${current_dir}/basys3.v
   PCF := ${current_dir}/basys3.pcf
-  BOARD_BUILDDIR := ${BUILDDIR}/basys3
 endif
 
-.DELETE_ON_ERROR:
-
-
-all: ${BOARD_BUILDDIR}/${TOP}.bit
-
-${BOARD_BUILDDIR}:
-	mkdir -p ${BOARD_BUILDDIR}
-
-${BOARD_BUILDDIR}/${TOP}.eblif: | ${BOARD_BUILDDIR}
-	cd ${BOARD_BUILDDIR} && symbiflow_synth -t ${TOP} -v ${VERILOG} -d ${BITSTREAM_DEVICE} -p ${PARTNAME} 2>&1 > /dev/null
-
-${BOARD_BUILDDIR}/${TOP}.net: ${BOARD_BUILDDIR}/${TOP}.eblif
-	cd ${BOARD_BUILDDIR} && symbiflow_pack -e ${TOP}.eblif -d ${DEVICE} -s ${SDC} 2>&1 > /dev/null
-
-${BOARD_BUILDDIR}/${TOP}.place: ${BOARD_BUILDDIR}/${TOP}.net
-	cd ${BOARD_BUILDDIR} && symbiflow_place -e ${TOP}.eblif -d ${DEVICE} -p ${PCF} -n ${TOP}.net -P ${PARTNAME} -s ${SDC} 2>&1 > /dev/null
-
-${BOARD_BUILDDIR}/${TOP}.route: ${BOARD_BUILDDIR}/${TOP}.place
-	cd ${BOARD_BUILDDIR} && symbiflow_route -e ${TOP}.eblif -d ${DEVICE} -s ${SDC} 2>&1 > /dev/null
-
-${BOARD_BUILDDIR}/${TOP}.fasm: ${BOARD_BUILDDIR}/${TOP}.route
-	cd ${BOARD_BUILDDIR} && symbiflow_write_fasm -e ${TOP}.eblif -d ${DEVICE}
-
-${BOARD_BUILDDIR}/${TOP}.bit: ${BOARD_BUILDDIR}/${TOP}.fasm
-	cd ${BOARD_BUILDDIR} && symbiflow_write_bitstream -d ${BITSTREAM_DEVICE} -f ${TOP}.fasm -p ${PARTNAME} -b ${TOP}.bit
-
-clean:
-	rm -rf ${BUILDDIR}
+include ${current_dir}/../../common/Makefile
\ No newline at end of file