What are the four processes in converting a C program to an executable program?

Question

What are the four processes in converting a C program to an executable program? What are the formats of each stage's input and output files?

What gcc flag is used to link a particular library into a C program? Give an example.

What gcc flag is used to specify directories where include files might be found?

What does the -D flag do when using gcc? What is an alternative to using the -D flag?

What are the four processes in converting a C program to an executable program? What are the formats of each stage's input and output files? What gcc flag is used to link a particular library into a C program? Give an example. What gcc flag is used to specify directories where include files might be found? What does the -D flag do when using gcc? What is an alternative to using the -D flag?

Explanation / Answer

Solution :-

1) there are four stages to convert a C program to an executable program. The stages are preprocessing, compiling, assembly and linking.

2) Preprocessing is the first stage to make a program to executable. The C program input the preprocessor and generates the output for compiling. The output is a print.i file.

The next step is compiling and this stage the input is print.i file and output will be print.s file.

After that the next stage is assembly. Assembly stage Thales input print.s file. After assembling the program this stage generates the print.o file.

The last stage is linking. The print.o file is input to this stage. The linker generates an executable file print. This is the final step of the converting a C program to executable.

3) The gcc -l flag is used to link a perticular library in C program. Example is -

$ gcc -static first.c -lmath -o first

Here the math librarybis linked to the C program named first.c

4) To find the directories where the include files are residing the gcc -L flag is used.

5) The gcc -D flag is used to define a macro for the Preprocessor. This macro is used by the Preprocessor.

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