标签：offset ++ project x86 htm void std 插入 link
--- standby
gcc - GNU project C and C++ compiler
If you only want some of the stages of compilation, you can use -x (or filename suffixes) to tell gcc where to start, and one of the options -c, -S, or -E to say where gcc is to stop. Note that some combinations (for example, -x cpp-output -E) instruct gcc to do nothing at all.
-E Stop after the preprocessing stage; do not run the compiler proper.-S Stop after the stage of compilation proper; do not assemble.-c Compile or assemble the source files, but do not link.-o targetfile Place output in file targetfile.1 [root@standby gcc]# date +%F_%H:%M:%S 2 2016-11-29_23:31:29 3 [root@standby gcc]# pwd 4 /data/gcc 5 [root@standby gcc]# ll 6 total 4 7 -rw-r--r-- 1 root root 82 Nov 29 23:27 hello.c 8 [root@standby gcc]# cat hello.c 9 #include <stdio.h> 10 int main(void) 11 { 12 printf("Hello World!\n"); 13 return 0; 14 } 15 [root@standby gcc]# 16 [root@standby gcc]# file hello.c 17 hello.c: ASCII C program text 18 [root@standby gcc]#
‘删除注释和";"、进行宏替换、将头文件插入进来、条件编译等‘1 [root@standby gcc]# gcc -E hello.c -o hello.i 2 [root@standby gcc]# ll 3 total 24 4 -rw-r--r-- 1 root root 82 Nov 29 23:27 hello.c 5 -rw-r--r-- 1 root root 16742 Nov 29 23:58 hello.i 6 [root@standby gcc]# file hello.i 7 hello.i: ASCII C program text 8 [root@standby gcc]#
‘生成汇编代码‘1 [root@standby gcc]# gcc -S hello.i -o hello.s 2 [root@standby gcc]# ll 3 total 28 4 -rw-r--r-- 1 root root 82 Nov 29 23:27 hello.c 5 -rw-r--r-- 1 root root 16742 Nov 29 23:58 hello.i 6 -rw-r--r-- 1 root root 444 Nov 30 00:00 hello.s 7 [root@standby gcc]# file hello.s 8 hello.s: ASCII assembler program text 9 [root@standby gcc]#
‘生成目标文件‘1 [root@standby gcc]# gcc -c hello.s -o hello.o 2 [root@standby gcc]# ll 3 total 32 4 -rw-r--r-- 1 root root 82 Nov 29 23:27 hello.c 5 -rw-r--r-- 1 root root 16742 Nov 29 23:58 hello.i 6 -rw-r--r-- 1 root root 1504 Nov 30 00:03 hello.o 7 -rw-r--r-- 1 root root 444 Nov 30 00:00 hello.s 8 [root@standby gcc]# file hello.o 9 hello.o: ELF 64-bit LSB relocatable, x86-64, version 1 (SYSV), not stripped 10 [root@standby gcc]#
‘生成可执行文件‘1 [root@standby gcc]# gcc hello.o -o helloworld 2 [root@standby gcc]# ll 3 total 40 4 -rw-r--r-- 1 root root 82 Nov 29 23:27 hello.c 5 -rw-r--r-- 1 root root 16742 Nov 29 23:58 hello.i 6 -rw-r--r-- 1 root root 1504 Nov 30 00:03 hello.o 7 -rw-r--r-- 1 root root 444 Nov 30 00:00 hello.s 8 -rwxr-xr-x 1 root root 6425 Nov 30 00:04 helloworld 9 [root@standby gcc]# file helloworld 10 helloworld: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.18, not stripped 11 [root@standby gcc]# 12 [root@standby gcc]# ./helloworld 13 Hello World! 14 [root@standby gcc]#
1 [root@standby gcc]# cat hello.s 2 .file "hello.c" 3 .section .rodata 4 .LC0: 5 .string "Hello World!" 6 .text 7 .globl main 8 .type main, @function 9 main: 10 .LFB0: 11 .cfi_startproc 12 pushq %rbp 13 .cfi_def_cfa_offset 16 14 .cfi_offset 6, -16 15 movq %rsp, %rbp 16 .cfi_def_cfa_register 6 17 movl $.LC0, %edi 18 call puts 19 movl $0, %eax 20 leave 21 .cfi_def_cfa 7, 8 22 ret 23 .cfi_endproc 24 .LFE0: 25 .size main, .-main 26 .ident "GCC: (GNU) 4.4.7 20120313 (Red Hat 4.4.7-17)" 27 .section .note.GNU-stack,"",@progbits 28 [root@standby gcc]#
标签：offset ++ project x86 htm void std 插入 link
原文地址：http://www.cnblogs.com/standby/p/6784602.html
