gcc,g++编绎过程

1.The Preprocessor
? expand macros and included header files. ?

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cpp hello.c >> hello.i

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2.The Compiler
? preprocessed source code to assembly language,for a specific processor ?

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gcc -Wall -S hello.i

3.The assembler
? convert assembly language into machine code and generate an object file

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as hello.s -0 hello.o

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4.Linker
? linking of object files to create an executeable,in practice,an executeable requires many external functions from system and c run-time(crt) libraries.

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gcc hello.o

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