import std.net.curl;

void main(){}

// Output:

Undefined symbols for architecture x86_64:
  "_curl_easy_cleanup", referenced from:
      _D3std3net4curl4Curl8shutdownMFZv in libphobos2.a(curl_3063_37c.o)
  "_curl_easy_setopt", referenced from:
      _D3std3net4curl4Curl3setMFE3etc1c4curl10CurlOptionAxaZv in libphobos2.a(curl_3065_14c.o)
      _D3std3net4curl4Curl3setMFE3etc1c4curl10CurlOptionlZv in libphobos2.a(curl_3066_14c.o)
      _D3std3net4curl4Curl5clearMFE3etc1c4curl10CurlOptionZv in libphobos2.a(curl_3068_207.o)
      _D3std3net4curl4Curl3setMFE3etc1c4curl10CurlOptionPvZv in libphobos2.a(curl_3067_14c.o)
  "_curl_easy_strerror", referenced from:
      _D3std3net4curl4Curl11errorStringMFiZAya in libphobos2.a(curl_3061_4a1.o)
  "_curl_global_cleanup", referenced from:
      _D3std3net4curl4Curl19_sharedStaticDtor36FZv in libphobos2.a(curl.o)
  "_curl_global_init", referenced from:
      _D3std3net4curl4Curl19_sharedStaticCtor35FZv in libphobos2.a(curl.o)
  "_curl_slist_free_all", referenced from:
      _D3std3net4curl4HTTP4Impl6__dtorMFZv in libphobos2.a(curl_3032_192.o)
  "_curl_version_info", referenced from:
      _D3std3net4curl4HTTP19_sharedStaticCtor34FZv in libphobos2.a(curl.o)
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
--- errorlevel 1

On Monday, 18 August 2014 at 14:24:54 UTC, Andrew Edwards wrote:
> import std.net.curl;
>
> void main(){}
>
> // Output:
>
> Undefined symbols for architecture x86_64:
>   "_curl_easy_cleanup", referenced from:

The problem here is that std.net.curl is based on libcurl, so you need to link your program against it.
Add '-L-lcurl' to your dmd invocation to do this.

On Monday, 18 August 2014 at 16:09:04 UTC, Martin Nowak wrote:
> The problem here is that std.net.curl is based on libcurl, so you need to link your program against it.
> Add '-L-lcurl' to your dmd invocation to do this.

I also added an enhancement request to load curl at runtime.
https://issues.dlang.org/show_bug.cgi?id=13324

On 8/19/14, 1:09 AM, Martin Nowak wrote:
> On Monday, 18 August 2014 at 14:24:54 UTC, Andrew Edwards wrote:
>> import std.net.curl;
>>
>> void main(){}
>>
>> // Output:
>>
>> Undefined symbols for architecture x86_64:
>>   "_curl_easy_cleanup", referenced from:
>
> The problem here is that std.net.curl is based on libcurl, so you need
> to link your program against it.
> Add '-L-lcurl' to your dmd invocation to do this.

Okay, got it. Thank you much.

On Tue, 19 Aug 2014 09:56:30 +0900
Andrew Edwards via Digitalmars-d-learn
<digitalmars-d-learn@puremagic.com> wrote:

> > Add '-L-lcurl' to your dmd invocation to do this.
> Okay, got it. Thank you much.
or you can add

  pragma(lib, "curl");

to your source file if you are using dmd.

On Tuesday, 19 August 2014 at 02:24:48 UTC, ketmar via Digitalmars-d-learn wrote:
> On Tue, 19 Aug 2014 09:56:30 +0900
> Andrew Edwards via Digitalmars-d-learn
> <digitalmars-d-learn@puremagic.com> wrote:
>
>> > Add '-L-lcurl' to your dmd invocation to do this.
>> Okay, got it. Thank you much.
> or you can add
>
>   pragma(lib, "curl");
>
> to your source file if you are using dmd.

And Windows. Since, apparently, pragma(lib) is only supported by COFF and OMF.

On Tuesday, 19 August 2014 at 02:24:48 UTC, ketmar via Digitalmars-d-learn wrote:
> On Tue, 19 Aug 2014 09:56:30 +0900
> Andrew Edwards via Digitalmars-d-learn
> <digitalmars-d-learn@puremagic.com> wrote:
>
>> > Add '-L-lcurl' to your dmd invocation to do this.
>> Okay, got it. Thank you much.
> or you can add
>
>   pragma(lib, "curl");
>
> to your source file if you are using dmd.

Actually, that's exactly what I did.

On Tue, 19 Aug 2014 03:37:23 +0000
Vladimir Panteleev via Digitalmars-d-learn
<digitalmars-d-learn@puremagic.com> wrote:

> And Windows. Since, apparently, pragma(lib) is only supported by COFF and OMF.
nope, GNU/Linux DMD supports it too (at least 32-bit version).

On Tuesday, 19 August 2014 at 03:56:38 UTC, ketmar via Digitalmars-d-learn wrote:
> On Tue, 19 Aug 2014 03:37:23 +0000
> Vladimir Panteleev via Digitalmars-d-learn
> <digitalmars-d-learn@puremagic.com> wrote:
>
>> And Windows. Since, apparently, pragma(lib) is only supported by COFF and OMF.
> nope, GNU/Linux DMD supports it too (at least 32-bit version).

Hmm, I believe I've been lied to, then!