Makefiles on UH ITS RedHat Linux

1. The make command will execute the commands listed in a file called makefile. (Note that there is no ".txt" or any other extension on this file.) make itself is a utility program that automates the steps necessary to do something like compile a program. See the instructions below on how to create a makefile and use a makefile.
2. Download these files and save them on UH ITS Linux (or copy and paste the text of the files using a Linux editor, such as vi): aloha.c and makefile-aloha
3. Make sure you can compile and run the file aloha.c without using a makefile. See the Software Instructions webpage for details.
4. Make a copy of makefile-aloha to a file called makefile with the cp command: cp makefile-aloha makefile
   
5. Run the commands in the makefile with the make command: make
   
6. The commands in the makefile will be displayed on the screen:
   gcc -c aloha.c
   gcc aloha.o -o program
   
7. Type the "dot-slash" (./) and then the executable file's name: ./program
   And you will see the output of your program.
   
8. Next, let's try a makefile that links and compiles muliple files! Download these files and save them on UH ITS Linux (or copy and paste the text of the files using a Linux editor, such as vi): inputdouble.c, getdouble.c, getdouble.h, and makefile-double
9. Make a copy of makefile-double to a file called makefile with the cp command: cp makefile-double makefile
   
10. Run the commands in the makefile with the make command: make
    The commands in the makefile will be displayed on the screen:
    gcc -c inputdouble.c
    gcc -c getdouble.c
    gcc inputdouble.o getdouble.o -o program -lm
    
    
11. Type the "dot-slash" (./) and then the executable file's name: ./program
    And you will see the output of your program.
    
12. If you want to use a makefile, which has a different name than "makefile", use the following command:
    make -f myMakeFile