没有依赖关系的编程

Programming with no dependencies

本文关键字：编程 关系 依赖      更新时间：2023-10-16

我正在尝试制作一个PE（可移植可执行文件），它将与Windows XP +一起使用并且没有依赖项。

我发现本指南非常有趣 http://www.catch22.net/tuts/reducing-executable-size

#define WIN32_LEAN_AND_MEAN
#include <windows.h>
extern "C" int __cdecl __purecall(void)
{
    return 0;
}
extern "C" int __cdecl main();
extern "C" int __cdecl mainCRTStartup( void )
{
    int mainret;
    mainret = main();
    ExitProcess(mainret);
}

我编译它

g++ -Wall -o2 -s -nodefaultlibs main.cpp -o test.exe

它给了我一堆错误：https://i.stack.imgur.com/fIFoD.png

C:UsersMain.cppDesktopcrt>g++ -Wall -o2 -s -nodefaultlibs  -lkernel32 main.cpp -o test.exe
C:UsersMain.cppAppDataLocalTempcczgOKUx.o:main.cpp:(.text+0x1c): multiple definition of `mainCRTStartup'
C:/TDM-GCC-32/bin/../lib/gcc/mingw32/5.1.0/../../../crt2.o:crt1.c:(.text+0x280): first defined here
C:/TDM-GCC-32/bin/../lib/gcc/mingw32/5.1.0/../../../crt2.o:crt1.c:(.text+0x5): undefined reference to `__dyn_tls_init_callback'
C:/TDM-GCC-32/bin/../lib/gcc/mingw32/5.1.0/../../../crt2.o:crt1.c:(.text+0x39): undefined reference to `__cpu_features_init'
C:/TDM-GCC-32/bin/../lib/gcc/mingw32/5.1.0/../../../crt2.o:crt1.c:(.text+0x3e): undefined reference to `_fpreset'
C:/TDM-GCC-32/bin/../lib/gcc/mingw32/5.1.0/../../../crt2.o:crt1.c:(.text+0x4b): undefined reference to `_CRT_glob'
C:/TDM-GCC-32/bin/../lib/gcc/mingw32/5.1.0/../../../crt2.o:crt1.c:(.text+0x73): undefined reference to `__getmainargs'
C:/TDM-GCC-32/bin/../lib/gcc/mingw32/5.1.0/../../../crt2.o:crt1.c:(.text+0x78): undefined reference to `_CRT_fmode'
C:/TDM-GCC-32/bin/../lib/gcc/mingw32/5.1.0/../../../crt2.o:crt1.c:(.text+0x82): undefined reference to `_imp___iob'
C:/TDM-GCC-32/bin/../lib/gcc/mingw32/5.1.0/../../../crt2.o:crt1.c:(.text+0x87): undefined reference to `_fmode'
C:/TDM-GCC-32/bin/../lib/gcc/mingw32/5.1.0/../../../crt2.o:crt1.c:(.text+0x96): undefined reference to `_setmode'
C:/TDM-GCC-32/bin/../lib/gcc/mingw32/5.1.0/../../../crt2.o:crt1.c:(.text+0x9b): undefined reference to `_CRT_fmode'
C:/TDM-GCC-32/bin/../lib/gcc/mingw32/5.1.0/../../../crt2.o:crt1.c:(.text+0xaa): undefined reference to `_setmode'
C:/TDM-GCC-32/bin/../lib/gcc/mingw32/5.1.0/../../../crt2.o:crt1.c:(.text+0xaf): undefined reference to `_CRT_fmode'
C:/TDM-GCC-32/bin/../lib/gcc/mingw32/5.1.0/../../../crt2.o:crt1.c:(.text+0xbe): undefined reference to `_setmode'
C:/TDM-GCC-32/bin/../lib/gcc/mingw32/5.1.0/../../../crt2.o:crt1.c:(.text+0xc3): undefined reference to `__p__fmode'
C:/TDM-GCC-32/bin/../lib/gcc/mingw32/5.1.0/../../../crt2.o:crt1.c:(.text+0xc9): undefined reference to `_fmode'
C:/TDM-GCC-32/bin/../lib/gcc/mingw32/5.1.0/../../../crt2.o:crt1.c:(.text+0xd0): undefined reference to `_pei386_runtime_relocator'
C:/TDM-GCC-32/bin/../lib/gcc/mingw32/5.1.0/../../../crt2.o:crt1.c:(.text+0xd8): undefined reference to `__main'
C:/TDM-GCC-32/bin/../lib/gcc/mingw32/5.1.0/../../../crt2.o:crt1.c:(.text+0xdd): undefined reference to `__p__environ'
C:/TDM-GCC-32/bin/../lib/gcc/mingw32/5.1.0/../../../crt2.o:crt1.c:(.text+0x100): undefined reference to `_cexit'
C:/TDM-GCC-32/bin/../lib/gcc/mingw32/5.1.0/../../../crt2.o:crt1.c:(.text+0x13f): undefined reference to `signal'
C:/TDM-GCC-32/bin/../lib/gcc/mingw32/5.1.0/../../../crt2.o:crt1.c:(.text+0x195): undefined reference to `signal'
C:/TDM-GCC-32/bin/../lib/gcc/mingw32/5.1.0/../../../crt2.o:crt1.c:(.text+0x1d0): undefined reference to `signal'
C:/TDM-GCC-32/bin/../lib/gcc/mingw32/5.1.0/../../../crt2.o:crt1.c:(.text+0x217): undefined reference to `signal'
C:/TDM-GCC-32/bin/../lib/gcc/mingw32/5.1.0/../../../crt2.o:crt1.c:(.text+0x233): undefined reference to `signal'
C:/TDM-GCC-32/bin/../lib/gcc/mingw32/5.1.0/../../../crt2.o:crt1.c:(.text+0x250): more undefined references to `signal' follow
C:/TDM-GCC-32/bin/../lib/gcc/mingw32/5.1.0/../../../crt2.o:crt1.c:(.text+0x266): undefined reference to `_fpreset'
C:/TDM-GCC-32/bin/../lib/gcc/mingw32/5.1.0/../../../crt2.o:crt1.c:(.text+0x28c): undefined reference to `_imp____set_app_type'
C:/TDM-GCC-32/bin/../lib/gcc/mingw32/5.1.0/../../../crt2.o:crt1.c:(.text+0x2ac): undefined reference to `_imp____set_app_type'
C:/TDM-GCC-32/bin/../lib/gcc/mingw32/5.1.0/../../../crt2.o:crt1.c:(.text+0x2c1): undefined reference to `_imp__atexit'
C:/TDM-GCC-32/bin/../lib/gcc/mingw32/5.1.0/../../../crt2.o:crt1.c:(.text+0x2d1): undefined reference to `_imp___onexit'
C:/TDM-GCC-32/bin/../lib/gcc/mingw32/5.1.0/../../../../mingw32/bin/ld.exe: C:/TDM-GCC-32/bin/../lib/gcc/mingw32/5.1.0/../../../crt2.o: bad reloc address 0x20 in section `.eh_frame'
collect2.exe: error: ld returned 1 exit status

据我了解，我的 mainCRTStartup 干扰了我的编译器正在添加的另一个 mainCRTStartup。

我在Windows上使用TDM-GCC。

在建议使用 -nostdlib 而不是 -nodefaultlibs 之后，我得到的错误要少得多。

我目前拥有的是

C:UsersMain.cppAppDataLocalTempccMYa3VN.o:main.cpp:(.text+0x11): undefined reference to `__main'
C:UsersMain.cppAppDataLocalTempccMYa3VN.o:main.cpp:(.text+0x31): undefined reference to `ExitProcess@4'

GCC 使用一些内部子例程，包含在 libgcc.a 中，不能排除。
请参阅 https://gcc.gnu.org/onlinedocs/gcc-5.3.0/gcc/Link-Options.html#Link-Options：

被 -nostdlib 和 -nodefaultlibs 绕过的标准库之一 是libgcc.a，GCC用来的内部子例程库 克服特定机器的缺点或特殊需求 一些语言。（有关 GCC 输出的更多讨论，请参阅与 GCC 输出的接口 libgcc.a.） 在大多数情况下，即使你想要 libgcc.a，你也需要 libgcc.a 避免使用其他标准库。换句话说，当您指定 -nostdlib 或 -nodefaultlibs 通常也应该指定 -LGCC。这可确保您没有对内部 GCC 的未解析引用 库子例程。

附言函数ExitProcess和SetUnhandledExceptionFilter来自必须包含在链接器流中的kernel32.lib。 可以减少库，但不能省略系统和操作系统库。

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