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Enable lld as the system linker by default on amd64

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The migration to LLVM's lld linker has been in progress for quite some
time - about three years ago I opened an upstream LLVM meta-bug to track
issues using lld as FreeBSD's linker, and about 1.5 years ago requested
the first exp-run with lld as the system linker.

As of r327783 we enabled LLD_BOOTSTRAP by default on amd64, using lld as
the linker to link the kernel and world, but GNU ld was still installed
as /usr/bin/ld.

The vast majority of issues observed when building ports with lld as the
system linker have now been solved, so set LLD_IS_LD by default on amd64
and install lld as /usr/bin/ld.  A small number of port failures remain
and these will be addressed in the near future.

Thanks to antoine@ for handling the exp-runs, krion@ for investigating
many port failures and adding LLD_UNSAFE or other fixes or workarounds,
and everyone who helped investigate, fix or tag ports.

PR:		214864 (exp-run)
Sponsored by:	The FreeBSD Foundation
This commit is contained in:
Ed Maste 2018-05-30 18:04:25 +00:00
parent b3bc3d7925
commit 1bf8f95706
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=334391
1 changed files with 1 additions and 4 deletions
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5
share/mk/src.opts.mk
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@ -263,11 +263,8 @@ __DEFAULT_YES_OPTIONS+=LLVM_LIBUNWIND
.else
__DEFAULT_NO_OPTIONS+=LLVM_LIBUNWIND
.endif
.if ${__T} == "aarch64"
.if ${__T} == "aarch64" || ${__T} == "amd64"
__DEFAULT_YES_OPTIONS+=LLD_BOOTSTRAP LLD_IS_LD
.elif ${__T} == "amd64"
__DEFAULT_YES_OPTIONS+=LLD_BOOTSTRAP
__DEFAULT_NO_OPTIONS+=LLD_IS_LD
.else
__DEFAULT_NO_OPTIONS+=LLD_BOOTSTRAP LLD_IS_LD
.endif