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https://github.com/Hizenberg469/Makefile-tutorial.git
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144 lines
5.9 KiB
Makefile
144 lines
5.9 KiB
Makefile
#############GUIDE LIST##########################################
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# G1. CC: #
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# Flag to mention the C compiler to used. #
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# #
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# G2. CFLAGS: #
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# Flag to specify the option for C compiler. #
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# #
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# G3. OUTPUT_OPTION: #
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# Tells compiler(mainly gcc or clang) to find #
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# the dependencies(include header file) of src #
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# file and add those to *.d files. This is a #
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# easy workaround for G12. #
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# #
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# G4. CXX: #
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# Flag to mention the C++ compiler to used. #
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# #
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# G5. CXXFLAGS: #
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# Flag to specify the option for C++ compiler. #
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# #
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# G6. EXE_NAME: #
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# Name of the executable to be created. #
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# #
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# G7. SOURCE: #
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# All the source to be used for compilation. #
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# #
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# G8. OBJS: #
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# All the object file for linking. #
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# #
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# G9. DEPS: #
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# All the dependencies information file. #
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# #
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# G10. -include #
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# Tells GNU make to include all the file to #
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# specify dependencies. Healthy replacment of #
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# G12. #
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# #
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# G11. "Mentioned below" #
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# #
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# G12. "Mentioned below" #
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# #
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# G13. "Mentioned below" #
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# #
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# G14. "Mentioned below" #
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#################################################################
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#include Makefile.config
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#Flags
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# C program
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CC = gcc
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CFLAGS = -g
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OUTPUT_OPTION = -MMD -MP -o $@
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SHARED_LIBRARY_EXTENSION = so
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SHARED_LIBRARY_FLAG = -shared
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# C++ program
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#CXX = g++
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#CXXFLAGS = -g
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#Variables
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EXE_NAME = exe #Executable name.
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SOURCE = $(wildcard *.c) #Source files.
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OBJS = $(SOURCE:.c=.o) #Object files.
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DEPS = $(SOURCE:.c:.d) #dependencies (To know the include files used in src)
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-include ${DEPS}
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LIB = lib
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# OR can provide name of the file individually.
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# The above for files present in the same directory as this
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# files is present.
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#
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# .d files look like a part of Makefile.
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# and it IS the part of Makefile.
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##G11.
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#####RULES IN MAKEFILE###################################
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# ruleName: "files that are dependencies" #
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# "Specify the commands to be executed" #
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# #
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# These are the rules that Makefile uses #
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# to do the operations, as a build tool. #
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#########################################################
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#Executables and library with dependencies
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${EXE_NAME}: ${OBJS}
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${CC} ${OJBS} -o ${EXE_NAME}
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##G12.
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#####SOURCE FILE DEPENDENT ON HEADER FILE################
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# "src or obj file": "header file" #
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# for exe -> src.o: header.h #
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# #
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# If the src file of the given header file is #
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# modified then, this specification ensures #
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# the compilation of that source file if any #
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# change is done. #
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#########################################################
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#Friendly help rule.
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help:
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-@echo "Customise the help rule to print help log."
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##G13.
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#######HIDING AND SKIPPING COMMANDS##########################
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# -@ Tells the GNU make to not print the command before #
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# executing it and enable to skip the command if it #
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# failed to compile, as make stop if any command fails. #
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#############################################################
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#Building the Static library.
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${LIB}: ${OBJS}
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ar cr ${LIB}.a ${OBJS}
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#Shorthand of doing the above same thing
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${LIB}: ${LIB}(${OBJS})
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#This link is about creating and using shared library
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#https://www.cprogramming.com/tutorial/shared-libraries-linux-gcc.html
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#Bulding the dynamic library.
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${LIB}.${SHARED_LIBRARY_EXTENSION}: ${OBJS}
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${CC} ${SHARED_LIBRARY_FLAG} -o $@ $^
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##G14.
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###MEANING OF $@ AND $^ SYMBOLS ON ABOVE RULE####################
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# $@ -> Replacing itself with rule under which #
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# its written. #
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# $^ -> Replacing itself with dependencies of rule. #
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#################################################################
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#Rules for cleaning.
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clean:
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-@rm -f ${OBJS}
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realclean: clean
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-@rm -f ${LIB}
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