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Message-ID: <CAEqUM+eC90xzbVzznE9ZU+QUhf3vSHqRKeEWhTSQ-NyahZZXPQ@mail.gmail.com>
Date: Tue, 12 Oct 2021 09:09:18 +0300
From: Nagakamira <nagakamira@...il.com>
To: musl@...ts.openwall.com
Subject: Re: Newbie cross compiling with LLVM
You can pass --unwindlib=libunwind and rtlib, they are both link options
On Tue, Oct 12, 2021, 8:55 AM Matt Andrews <mattandrews@...il.com> wrote:
> > --rtlib=compiler-rt
>
> Is that a compiler option or a linker option? I used it in both places,
> but still get the same error.
>
> On Tue, Oct 12, 2021 at 4:00 PM Nagakamira <nagakamira@...il.com> wrote:
>
>> --rtlib=compiler-rt
>>
>> On Tue, Oct 12, 2021, 7:58 AM Matt Andrews <mattandrews@...il.com> wrote:
>>
>>> > -fuse-ld=lld
>>>
>>> I actually used
>>>
>>> -fuse-ld=ld.lld
>>>
>>> That did the trick, but has unlocked another error
>>>
>>> ld.lld: error: unable to find library -lgcc
>>> ld.lld: error: unable to find library -lgcc_eh
>>>
>>> I thought musl compiles with it's own headers?
>>>
>>> On Tue, Oct 12, 2021 at 3:54 PM Nagakamira <nagakamira@...il.com> wrote:
>>>
>>>> -fuse-ld=lld
>>>>
>>>> On Tue, Oct 12, 2021, 3:26 AM Jeffrey Walton <noloader@...il.com>
>>>> wrote:
>>>>
>>>>> On Mon, Oct 11, 2021 at 7:55 PM Matt Andrews <mattandrews@...il.com>
>>>>> wrote:
>>>>> >
>>>>> > >> How do I specify which linker to use?
>>>>> > >
>>>>> > >LD. Also see
>>>>> https://www.gnu.org/software/make/manual/html_node/Implicit-Variables.html
>>>>> .
>>>>> >
>>>>> > Looking at the ./configure for musl (which is not based on autoconf
>>>>> according to the docs), there is no mention of LD. Setting LD for
>>>>> ./configure and/or the call to make still results in the error.
>>>>> >
>>>>> > Who calls the linker? The compiler or make? Shouldn't clang know
>>>>> where it's linker is? How to tell clang which linker to use?
>>>>>
>>>>> You can have the compiler driver call the linker for you by specifying
>>>>> -o with an output file name. In that case, $CC or $CXX will drive the
>>>>> link. And in this case, your LDFLAGS should prefix options with -Wl to
>>>>> tell the compiler driver the option is for the linker.
>>>>>
>>>>> Jeff
>>>>>
>>>>
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