diff --git a/gnumake/custom/Makefile b/gnumake/custom/Makefile
new file mode 100644
index 0000000..9f30810
--- /dev/null
+++ b/gnumake/custom/Makefile
@@ -0,0 +1,28 @@
+.PHONY: clean
+
+# Compiler flags
+CC=gcc
+CFLAGS=-Wall -Wextra -std=c99
+
+# Checks if executables exist
+GREETING_EXISTS := $(or $(and $(wildcard greeting),1),)
+TWOPARTER_EXISTS := $(or $(and $(wildcard twoparter),1),)
+
+# Builds two executables, greeting and twoparter
+all: greeting twoparter
+
+# Builds greeting with default compilation settings
+greeting: greeting.c
+
+# Builds executable from multiple .c files and a .h header
+twoparter: part1.c part2.c header.h
+	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^
+
+# Removes executables if they exist
+clean:
+ifdef GREETING_EXISTS
+	rm greeting
+endif
+ifdef TWOPARTER_EXISTS
+	rm twoparter
+endif