未定义的符号“开始"；通过LD链接D程序时 [英] Undefined symbol "start" while linking D program through LD

问题描述

我有以下简单程序:

import std.stdio;

int main(string[] argv) {
    writeln("Hello, world!");

    return 0;
}

我正在如下构建它:

DMD -c -m64 -od/proj/out -w -wi -fPIC -debug \
    -g -I/proj/hello -unittest /proj/hello.d

LD -L/usr/share/dmd/lib/ -arch x86_64 -execute -macosx_version_min 10.7 \
    -pie -lm -lpthread -lphobos2 -o /proj/out/hello_app /proj/out/hello.o

编译通过得很顺利，但是将卡纸与以下内容联系起来:

Compilation passes perfectly, but linking stucks with following:

Undefined symbols for architecture x86_64:
  "start", referenced from:
     -u command line option
     (maybe you meant: _D3std9algorithm41__T10startsWithVAyaa6_61203d3d2062TAhTAhZ10startsWithFAhAhZb, _D4core6thread6Thread5startMFZv , _D3std9algorithm91__T10startsWithVAyaa11_62203c20612e74696d6554TAS3std8datetime13PosixTimeZone10TransitionTlZ10startsWithFAS3std8datetime13PosixTimeZone10TransitionlZb , _D3std9algorithm43__T10startsWithVAyaa6_61203d3d2062TAyaTAyaZ10startsWithFAyaAyaZb , _D3std9algorithm41__T10startsWithVAyaa6_61203d3d2062TAxaTaZ10startsWithFAxaaZb , _D3std9algorithm92__T10startsWithVAyaa11_62203c20612e74696d6554TAS3std8datetime13PosixTimeZone10LeapSecondTylZ10startsWithFAS3std8datetime13PosixTimeZone10LeapSecondylZb , _D3std9algorithm92__T10startsWithVAyaa11_62203c20612e74696d6554TAS3std8datetime13PosixTimeZone10TransitionTylZ10startsWithFAS3std8datetime13PosixTimeZone10TransitionylZb )
ld: symbol(s) not found for architecture x86_64

我想我忘了要链接的其他静态库以设置所有内容，但是究竟是什么呢?

I guess I forgot some additional static library to link with to have it setup everything, but what exactly?

我也看过有关如何进行单独编译以及在dlang网站上某个地方链接的说明，但是找不到它.

Also I've seen instructions about how to do separate compilation and linking somewhere on dlang site, but cannot find it.

UPD1::使用gcc -L/usr/share/dmd/lib/ -lphobos2 -lm -lpthread hello.o在GCC的帮助下进行链接时，它可以工作，但是我需要使用ld.

UPD1: When linking with help of GCC using gcc -L/usr/share/dmd/lib/ -lphobos2 -lm -lpthread hello.o, it works, but I need to use ld.

推荐答案

链接时添加-lcrt1.o.

LD -L/usr/share/dmd/lib/ -arch x86_64 -execute -macosx_version_min 10.7 \
  -pie -lm -lpthread -lphobos2 -lcrt1.o -o /proj/out/hello_app /proj/out/hello.o

[更新] 啊，你懂了:)

[update] Ah, you got it : )

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