在Mac上使用D的std.net.curl时出现libcurl问题

Question

我正试图在Mac上使用带有D的libcurl来加快速度.

我正在使用最新的dmd2编译器(DMD64 D Compiler v2.062).

以下示例在Windows上编译并正常工作:

import std.net.curl,std.conv,std.stdio;

void main() {
     string content = to!string(get("dlang.org"));
     writeln(content);
}

在Mac上编译时,我得到以下输出:

~/src $ dmd dcurl.d
Undefined symbols for architecture x86_64:
  "_curl_easy_cleanup", referenced from:
      _D3std3net4curl4Curl8shutdownMFZv in libphobos2.a(curl_1522_37c.o)
  "_curl_easy_duphandle", referenced from:
      _D3std3net4curl4Curl3dupMFZS3std3net4curl4Curl in libphobos2.a(curl_151e_149.o)
  "_curl_easy_init", referenced from:
      _D3std3net4curl4Curl10initializeMFZv in libphobos2.a(curl_151d_432.o)
  "_curl_easy_perform", referenced from:
      _D3std3net4curl4Curl7performMFbZi in libphobos2.a(curl_1528_2fb.o)
  "_curl_easy_setopt", referenced from:
      _D3std3net4curl4Curl3setMFE3etc1c4curl10CurlOptionlZv in libphobos2.a(curl_1525_14c.o)
      _D3std3net4curl4Curl3setMFE3etc1c4curl10CurlOptionAxaZv in libphobos2.a(curl_1524_14c.o)
      _D3std3net4curl4Curl3setMFE3etc1c4curl10CurlOptionPvZv in libphobos2.a(curl_1526_14c.o)
      _D3std3net4curl4Curl5clearMFE3etc1c4curl10CurlOptionZv in libphobos2.a(curl_1527_207.o)
  "_curl_easy_strerror", referenced from:
      _D3std3net4curl4Curl11errorStringMFiZAya in libphobos2.a(curl_1520_4a1.o)
  "_curl_global_cleanup", referenced from:
      _D3std3net4curl4Curl19_sharedStaticDtor29FZv in libphobos2.a(curl.o)
  "_curl_global_init", referenced from:
      _D3std3net4curl4Curl19_sharedStaticCtor28FZv in libphobos2.a(curl.o)
  "_curl_slist_append", referenced from:
      _D3std3net4curl3FTP3dupMFZS3std3net4curl3FTP in libphobos2.a(curl_1518_ea.o)
      _D3std3net4curl3FTP10addCommandMFAxaZv in libphobos2.a(curl_1518_ea.o)
      _D3std3net4curl4HTTP3dupMFZS3std3net4curl4HTTP in libphobos2.a(curl_1517_140.o)
      _D3std3net4curl4HTTP16addRequestHeaderMFAxaAxaZv in libphobos2.a(curl_1517_140.o)
  "_curl_slist_free_all", referenced from:
      _D3std3net4curl3FTP4Impl6__dtorMFZv in libphobos2.a(curl_1518_ea.o)
      _D3std3net4curl3FTP13clearCommandsMFZv in libphobos2.a(curl_1518_ea.o)
      _D3std3net4curl4HTTP4Impl6__dtorMFZv in libphobos2.a(curl_1517_140.o)
      _D3std3net4curl4HTTP19clearRequestHeadersMFZv in libphobos2.a(curl_1517_140.o)
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status
--- errorlevel 1

这似乎意味着一个链接问题.

我有libcurl:/usr/lib/libcurl.3.dylib /usr/lib/libcurl.4.dylib /usr/lib/libcurl.dylib

但我甚至不确定dmd是否试图使用它们.

我以前用C/C++(在使用这些库的同一台机器上)完成了这个,所以我认为它必须是一个版本问题,否则我需要将一些标志传递给编译器.

非常感激任何的帮助.

Answer 1

你需要链接libcurl.默认情况下它没有链接.所以,而不是

dmd dcurl.d

你需要做的

dmd -L-lcurl dcurl.d