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From: Jan Beich <jbeich@FreeBSD.org>
To: Willem Jan Withagen <wjw@digiware.nl>
Cc: "ports\@freebsd.org" <ports@freebsd.org>
Subject: Re: Using a different linker in a CMake project
References: <9e4e72ba-f08a-667d-076a-f4d20614b41f@digiware.nl>
Date: Thu, 26 Sep 2019 19:48:45 +0200
In-Reply-To: <9e4e72ba-f08a-667d-076a-f4d20614b41f@digiware.nl> (Willem Jan
 Withagen's message of "Thu, 26 Sep 2019 18:18:17 +0200")
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Willem Jan Withagen <wjw@digiware.nl> writes:

> Hi,
>
> For building ceph14 in I need to use ld from the ports binutils.
> Mainly because of versioning that I can not get to work with the llvm
> linker, and is a know difference between GNU ld en LLVM ld.
>
> Just building in the project I was able to do that with:
>   -D  CMAKE_CXX_FLAGS_DEBUG=" -fuse-ld=/usr/local/bin/ld
>    -Wno-unused-command-line-argument"

Try defining LLD_UNSAFE=yes in port's Makefile. It'd be translated to
LDFLAGS+=-fuse-ld=bfd and then by USES=cmake into

	-DCMAKE_EXE_LINKER_FLAGS:STRING="${LDFLAGS}" \
	-DCMAKE_MODULE_LINKER_FLAGS:STRING="${LDFLAGS}" \
	-DCMAKE_SHARED_LINKER_FLAGS:STRING="${LDFLAGS}" \

  $ make -V CMAKE_ARGS:M\*bfd\* LLD_UNSAFE=
  -DCMAKE_EXE_LINKER_FLAGS:STRING="  -fstack-protector-strong -fuse-ld=bfd " -DCMAKE_MODULE_LINKER_FLAGS:STRING="  -fstack-protector-strong -fuse-ld=bfd " -DCMAKE_SHARED_LINKER_FLAGS:STRING="  -fstack-protector-strong -fuse-ld=bfd "

However, if you need /usr/local/bin/ld.bfd rather than /usr/bin/ld.bfd
on FreeBSD 11.* define USE_BINUTILS and pass LDFLAGS+=-B${LOCALBASE}/bin .