added first cheatsheets

Cheatsheets/makefile.md

@@ -0,0 +1,66 @@
+---
+title: makefile
+description: 
+published: true
+date: 2023-04-28T02:38:18.678Z
+tags: 
+editor: markdown
+dateCreated: 2023-04-28T02:22:37.379Z
+---
+
+# Makefile
+
+```
+VARIABLE	=	VALUE
+
+RULE: Dependency $(FUNCTION)
+	$(FUNCTION)
+	Task
+
+
+
+
+VAR		= value						#normale value assignment
+VAR		:= $(VAR).o					#value assignment with expansion
+VAR		!= uname					#add output of command
+VAR		:= $(sh uname)				#alternative way to add output
+VAR		+= -Wall -Werror -Wextra	#Append to value
+VAR		?= $(VAR)					#only sets if not defined
+
+Text functions
+$(SRC:.c=.o)						#Changes all suffixes from .c to .o
+
+Filename functions
+$(addprefix obj/,$(OBJ))			#Adds a directory to the filenames
+
+conditional functions
+if
+ifeq
+ifdef
+else
+or
+and
+endif
+foreach
+
+value function
+$(value (VAR))						#print value without expanding
+
+shell function
+$(shell COMMAND)					#insert output here
+
+control functions
+$(error Something went wrong)		#Makefile will stop here
+$(warning This is a warning)		#Display a warning
+$(info This is some info)			#Display some info
+
+$@		#is the rule name
+$<		#is the first dependancy
+$^		#are all dependancies
+$?		#only dependencies that have changed
+$|		#If anything changed, rebuild everything
+%		#acts as a wildcard in the rule
+
+
+.PHONY: all clean fclean re bonus	#Doesn't create a file named after the target
+```