diff --git a/Makefile b/Makefile
index 5f03e4f..f0b77fa 100755
--- a/Makefile
+++ b/Makefile
@@ -4,11 +4,6 @@
 PYUIC = pyuic5
 # PYRCC = pyrcc5
 
-CC = gcc
-CFLAGS = -O2 -fPIC
-LDFLAGs = -shared
-
-
 #Directory with ui files
 RESOURCE_DIR = src/resources/_ui
 
@@ -22,11 +17,21 @@ PYQT_UI = $(UI_FILES:%.ui=$(PYQT_DIR)/%.py)
 SVG_FILES = $(foreach dir, $(RCC_DIR), $(notdir $(wildcard $(dir)/*.svg)))
 PNG_FILES = $(SVG_FILES:%.svg=$(RCC_DIR)/%.png)
 
+CC = gcc
+CFLAGS = -O2 -fPIC
+LDFLAGS = -shared
+
+C_DIR = src/nmreval/clib
+
 all : ui
  
 ui : $(PYQT_UI)
 
-rcc:  $(PNG_FILES)
+rcc : $(PNG_FILES)
+
+# only one C file at the moment
+compile : $(C_DIR)/integrate.c
+	$(CC) $(LDFLAGS) $(CFLAGS) -o $(C_DIR)/integrate.so $<
 
 $(COMPILED_DIR)/%.py : $(RESOURCE_DIR)/%.ui
 	$(PYUIC) $< -o $@
diff --git a/src/nmreval/clib/integrate.so b/src/nmreval/clib/integrate.so
new file mode 100755
index 0000000..e726c62
Binary files /dev/null and b/src/nmreval/clib/integrate.so differ