linux链接文件总结（Linux link file summary）.docVIP

linux链接文件总结（Linux link file summary） By ottocho The GCC compilation process: The pretreatment ----- compilation assembly link ball ball 1) preconditioning (Pre-processing) At this stage, the compiler will C source code contains the header files such as the stdio.h compiler in, users can use the GCC option -E view. Usage: #gcc -E hello.c -o hello.i Effect: pretreatment with hello.c output hello.i file. 2) compilation phase (Compiling) At this stage, Gcc first to check the code specification, whether there is a syntax error, to determine the actual code to do the work, after the check, the Gcc code is translated into assembly language. Users can use the -S option to view this option only compile without compilation, compilation of code generation. Usage: [root]# GCC -S hello.i -o hello.s Effect: the pretreatment of hello.i output file compiled into hello.s files. 3) assembly phase (Assembling) The compilation stage is to compile stage to produce the .S file into a binary code. Usage: [root]# GCC -c hello.s -o hello.o Effect: the compilation of the output file test.s compiler output test.o file. 4) link stage (Link) In successfully entered the stage of the link. No link options Usage: [root]# GCC hello.o -o hello Function: compile the hello.o output file link into the final executable file hello. Static link library and dynamic link library A static library that compile link, the library file of all the code added to the executable file, thus generating relatively large files. The suffix is generally .A. DLL at compile link does not take the library file code into the executable file, but in the program is executed by the runtime loading link library files, so you can save the cost of the system. Dynamic library general suffix .So, such as the libc.so.6 is a dynamic library. GCC by default at compile time using dynamic library. Static library -c hello.c -o hello.o $GCC $ar CQS libhello.a hello.o The link here specifies the position parameters of //-static static librar