Taken from https://gitweb.gentoo.org/repo/gentoo.git/tree/sys-devel/llvm-roc/files

diff -Naur a/clang/lib/Basic/CMakeLists.txt b/clang/lib/Basic/CMakeLists.txt
--- a/clang/lib/Basic/CMakeLists.txt	2019-12-28 07:42:49.119055933 +0100
+++ b/clang/lib/Basic/CMakeLists.txt	2019-12-28 07:42:13.265056070 +0100
@@ -2,6 +2,7 @@
   Core
   MC
   Support
+  Option
   )
 
 find_first_existing_vc_file("${LLVM_MAIN_SRC_DIR}" llvm_vc)
diff -Naur a/clang/lib/Driver/CMakeLists.txt b/clang/lib/Driver/CMakeLists.txt
--- a/clang/lib/Driver/CMakeLists.txt	2019-12-28 07:41:39.521056199 +0100
+++ b/clang/lib/Driver/CMakeLists.txt	2019-12-28 07:40:23.998056487 +0100
@@ -79,4 +79,5 @@
   LINK_LIBS
   clangBasic
   ${system_libs}
+  pthread
   )
elected'>koszko</option>
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<tr><td class='sub'>Wojtek's customized Guix</td><td class='sub right'></td></tr></table>
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<div class='path'>path: <a href='/guix/log/?id=b31730fec6c8522ffa3039eb65828c10254a45ba'>root</a>/<a href='/guix/log/tests?id=b31730fec6c8522ffa3039eb65828c10254a45ba'>tests</a>/<a href='/guix/log/tests/git.scm?id=b31730fec6c8522ffa3039eb65828c10254a45ba'>git.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/tests/git.scm?id=b31730fec6c8522ffa3039eb65828c10254a45ba&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-06-09 00:34:52 +0200'>2020-06-09</span></td><td><a href='/guix/commit/tests/git.scm?id=72357e2170e88f73c11ff089f87a744cee8606ec'>git: 'commit-difference' really excludes the ancestors of #:excluded.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/git.scm (commit-difference): Initialize VISITED to the closure of
OLD and EXCLUDED, as written in the docstring.
* tests/git.scm ("commit-difference, excluded commits"): Adjust
accordingly.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-05-25 00:00:28 +0200'>2020-05-25</span></td><td><a href='/guix/commit/tests/git.scm?id=c098c11be8eb9e0c12be42640721e3cb21c37628'>git: Add 'commit-relation'.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/git.scm (commit-relation): New procedure.
* tests/git.scm ("commit-relation"): New test.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-12-27 13:52:49 +0100'>2019-12-27</span></td><td><a href='/guix/commit/tests/git.scm?id=785af04a7574867dc940c791daa938a2432d0450'>git: 'commit-difference' takes a list of excluded commits.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/git.scm (commit-closure): Add 'visited' optional parameter.
(commit-difference): Add 'excluded' optional parameter; pass second
argument to 'commit-closure'.
* tests/git.scm ("commit-difference, excluded commits"): New test.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-09-23 10:38:43 +0200'>2019-09-23</span></td><td><a href='/guix/commit/tests/git.scm?id=873f6f1334ab06a69e768a8aea0054404237542f'>git: Add 'commit-difference'.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/git.scm (commit-closure, commit-difference): New procedures.
* guix/tests/git.scm, tests/git.scm: New files.
* Makefile.am (dist_noinst_DATA): Add guix/tests/git.scm.
(SCM_TESTS): Add tests/git.scm.
</span></span></td><td>Ludovic Courtès</td></tr>