C Language Compile
since 28 April, 1999 last modified 28 April, 1999

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Compile Option

• cc -o execution_file_name
  makes execution_file_name excutable file.
  an example : cc world.c -o world
• cc -c source_file_name.c
  makes source_file_name.o object file.
  an example : cc -c world.c

Modular Compile

If there are two C source files to be complied to a exe file, the following steps can make it.

• Make each object files
  cc -c korea.c => korea.o
  cc -c japan.c => japan.o
  
• Compile the files to an execuable file.
  cc korea.o japan.o -o eastasia => eastasia

Compile with a Makefile

The modular compile can be done with the following makefile.

eastasia : korea.o japan.o
[TAB] cc korea.o japan.o -o eastasia

An explanation of the Makefile

• A : B (ex. eastasia : korea.o japan.o) defines the depandancy between A and B, A is made from B, so Make utility checks the modification time of the two files and if the time of B is more recent, It will run the below script.
  If the B is missed, the below excustion script will run without checking a condition (The 'cleanup' in the below code is an example.).

  cleanup :
  [TAB] -rm korea.o japan.o

  usage : 'make cleanup' deletes all the object files.

• execution script (ex. cc korea.o ...) the depandancy is cheked then, the utility runs the script.

Macros in Makefile

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Korean Engineering Databases © copyright Namchul Do, 1999