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Differential D52908

[LLD] [docs] Mention some notable feature in the release notes
ClosedPublic

Authored by mstorsjo on Oct 4 2018, 2:31 PM.

Details

Reviewers
ruiu
rnk
Commits
rGdb9148d21dec: [docs] Mention some notable feature in the release notes
rLLD343878: [docs] Mention some notable feature in the release notes
rL343878: [docs] Mention some notable feature in the release notes
Summary

Trying to fill in releas notes as we go, even though there's a long way to go still until the branch point for 8.0.

LLD can now link clang.exe from object files compiled with GCC 7.x; with GCC 5.x one still needs D52602 though.

Diff Detail

Repository
rL LLVM

Event Timeline

mstorsjo created this revision.Oct 4 2018, 2:31 PM
smeenai added a subscriber: smeenai.Oct 4 2018, 2:35 PM
smeenai added inline comments.
docs/ReleaseNotes.rst
54–55 ↗(On Diff #168379)

I'm pretty certain link.exe supports branch islands. They even have optimization options related to that (see /opt:lbr): https://docs.microsoft.com/en-us/cpp/build/reference/opt-optimizations?view=vs-2017

mstorsjo added inline comments.Oct 4 2018, 2:37 PM
docs/ReleaseNotes.rst
54–55 ↗(On Diff #168379)

Oh, ok. I remember testing a pretty synthetic test case which it failed to link though, but maybe it does better with real-word code.

mstorsjo updated this revision to Diff 168383.Oct 4 2018, 2:38 PM

Corrected the statement about link.exe not supporting thunks for arm.

ruiu added a comment.Oct 4 2018, 2:40 PM

Maybe you should create a new section, "MinGW Improvements" for mingw improvements? I think most people who uses lld-link don't use lld-link for mingw, and I guess some of them even don't know what it is.

mstorsjo updated this revision to Diff 168440.Oct 5 2018, 12:50 AM

Added a separate section for MinGW related features.

emaste added a subscriber: emaste.Oct 5 2018, 6:09 AM

Looks good to me

ruiu accepted this revision.Oct 5 2018, 10:08 AM

LGTM

docs/ReleaseNotes.rst
46 ↗(On Diff #168440)

s/lld-link/lld/ for consistency with other notes.

This revision is now accepted and ready to land.Oct 5 2018, 10:08 AM
Closed by commit rL343878: [docs] Mention some notable feature in the release notes (authored by mstorsjo). · Explain WhyOct 5 2018, 12:45 PM
This revision was automatically updated to reflect the committed changes.

Revision Contents

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Diff 168509

lld/trunk/docs/ReleaseNotes.rst

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COFF Improvements COFF Improvements
----------------- -----------------
* PDB GUID is set to hash of PDB contents instead to a random byte * PDB GUID is set to hash of PDB contents instead to a random byte
sequence for build reproducibility. sequence for build reproducibility.
* The following flags have been added: ``/force:multiple`` * The following flags have been added: ``/force:multiple``
* lld now can link against import libraries produced by GNU tools.
* lld can create thunks for ARM, to allow linking images over 16 MB.
MinGW Improvements
------------------
* lld can now automatically import data variables from DLLs without the
use of the dllimport attribute.
* lld can now use existing normal MinGW sysroots with import libraries and
CRT startup object files for GNU binutils. lld can handle most object
files produced by GCC, and thus works as a drop-in replacement for
ld.bfd in such environments.
MachO Improvements MachO Improvements
------------------ ------------------
* Item 1. * Item 1.