how to create makefile for c program in unix

How to create makefile for c program in unix code#
How to create makefile for c program in unix windows#

Rules have the form: targetFile: inputFile1 inputFile2.

The key information in a makefile consists of a variety of rules for producing “target” files. ProgA2.o: progA2.cpp utilities.h progA1.h ProgA1.o: progA1.cpp utilities.h progA1.h G++ -g -DDEBUG utilities.o progA1.o progA2.o This file should reside in the project directory, and should be called “ Makefile” or “ makefile”.

How to create makefile for c program in unix windows#

Even if you delete the “.txt’ when you save the file, you will find when you transfer the file that Windows insisted upon calling it ”Makefile.“ instead of ”Makefile'.

Many Windows programs will refuse to allow you to create a file named “Makefile” - they will insist upon adding a file extension such as “.txt” to the end.The insidious part about both this problem and the one before it is that your make file will look just fine, because the flaw is in what are, in essence, “invisible” characters. You may type a “Tab”, but the editor may replace it with multiple blanks space characters. Many Windows editors will play fast and loose with Tab characters.

If you fail to do the proper conversion, your make file will be broken. Make is particularly sensitive to to differences in line endings used in Unix and Windows. There’s too many things that can go wrong: How do you create a Makefile? It’s just text, so fire up your favorite text editor ( emacs, vim, nano, etc.).ĭo not, however, try to use a Windows editor to create Makefiles with the intention of transferring it over to the Unix system. All of the progA*.cpp files have an #include statement for a file progA1.h. Program progB is produced by compiling file utilities.cpp and progB1.cpp and linking together the resulting. progA is produced by compiling files utilities.cpp, progA1.cpp, and progA2.cpp and linking together the resulting. Suppose that we are engaged in a project to produce 2 programs, progA and progB. The command used to produce the dependent file from the files it depends upon.Ī makefile may also include various macros/abbreviations designed to simplify the task of dealing with many instances of the same commands or files. The key bits of information in a makefile, therefore areįor each file, a list of other files it depends upon, and When the make program is run, it then checks to be sure that all of the needed files exist, and that each needed file has been updated more recently than all of the files it depends upon. We say that a file file1 depends upon a second file file2 if the file2 is used as input to some command used to produce file1.

How to create makefile for c program in unix code#

o files produced by compiling a single source code file). In a makefile, you record the steps necessary to build both the final file (e.g., your executable program) and each intermediate file (e.g., the. The Unix program make is designed to simplify such project management. Even more of a problem is passing them on to someone else (e.g., your instructor) and expecting them to know what to do to build your project from the source code. When you begin to develop projects that involve multiple files that need to be compiled or otherwise processed, keeping them all up-to-date can be a problem.