【发布时间】:2017-02-23 06:14:15
【问题描述】:
我写了一个幼稚的c程序try.c
#include <stdlib.h>
int main() {return 0;}
然后我尝试使用下面的shell脚本编译并运行它
CFLAGS='-Wpedantic -Wall -Wextra -Werror -std=c89'
gcc -o try ${CFLAGS} try.c -static
valgrind ./try -v --track-origins=yes
那么输出就相当混乱了:
==16641== Memcheck, a memory error detector
==16641== Copyright (C) 2002-2015, and GNU GPL'd, by Julian Seward et al.
==16641== Using Valgrind-3.11.0 and LibVEX; rerun with -h for copyright info
==16641== Command: ./try -v --track-origins=yes
==16641==
==16641== Conditional jump or move depends on uninitialised value(s)
==16641== at 0x419349: _int_free (in /home/su/ca/hw/1_try/try_static/trytrytry/try)
==16641== by 0x41D296: free (in /home/su/ca/hw/1_try/try_static/trytrytry/try)
==16641== by 0x46CCAE: fillin_rpath (in /home/su/ca/hw/1_try/try_static/trytrytry/try)
==16641== by 0x46D57A: _dl_init_paths (in /home/su/ca/hw/1_try/try_static/trytrytry/try)
==16641== by 0x44282B: _dl_non_dynamic_init (in /home/su/ca/hw/1_try/try_static/trytrytry/try)
==16641== by 0x443557: __libc_init_first (in /home/su/ca/hw/1_try/try_static/trytrytry/try)
==16641== by 0x400B77: (below main) (in /home/su/ca/hw/1_try/try_static/trytrytry/try)
但是,如果我删除“-static”选项,一切都会顺利。 我在 ubuntu 16.04(虚拟机)和 ubuntu 14.04(虚拟机)上试过 可能跟虚拟机有关?
【问题讨论】:
-
它与VM无关,但取决于您的
libc和GCC。 -
如果您将
main()更改为main(void),有什么变化吗?这两个在语义上是不同的,我只是在猜测,但这可能有助于建立答案...... -
它不会改变任何东西。
标签: c gcc static-libraries valgrind static-linking