[compiler-rt] [compiler-rt][Darwin] Drop i386 slice for builtins on modern SDKs (PR #215388)

Wed Aug 12 19:57:10 PDT 2026

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-s390x-linux` running on `systemz-1` while building `compiler-rt` at step 5 "ninja check 1".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/42/builds/9998

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 5 (ninja check 1) failure: stage 1 checked (failure)
******************** TEST 'libFuzzer-s390x-default-Linux :: fuzzer-timeout.test' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 1
/home/buildbot/sandbox/buildbot/clang-s390x-linux/stage1/./bin/clang    -Wthread-safety -Wthread-safety-reference -Wthread-safety-beta   --driver-mode=g++ -O2 -gline-tables-only -fsanitize=address,fuzzer -I/home/buildbot/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/lib/fuzzer  /home/buildbot/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/test/fuzzer/TimeoutTest.cpp -o /home/buildbot/sandbox/buildbot/clang-s390x-linux/stage1/runtimes/runtimes-bins/compiler-rt/test/fuzzer/S390XDefaultLinuxConfig/Output/fuzzer-timeout.test.tmp-TimeoutTest
# executed command: /home/buildbot/sandbox/buildbot/clang-s390x-linux/stage1/./bin/clang -Wthread-safety -Wthread-safety-reference -Wthread-safety-beta --driver-mode=g++ -O2 -gline-tables-only -fsanitize=address,fuzzer -I/home/buildbot/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/lib/fuzzer /home/buildbot/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/test/fuzzer/TimeoutTest.cpp -o /home/buildbot/sandbox/buildbot/clang-s390x-linux/stage1/runtimes/runtimes-bins/compiler-rt/test/fuzzer/S390XDefaultLinuxConfig/Output/fuzzer-timeout.test.tmp-TimeoutTest
# RUN: at line 2
/home/buildbot/sandbox/buildbot/clang-s390x-linux/stage1/./bin/clang    -Wthread-safety -Wthread-safety-reference -Wthread-safety-beta   --driver-mode=g++ -O2 -gline-tables-only -fsanitize=address,fuzzer -I/home/buildbot/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/lib/fuzzer  /home/buildbot/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/test/fuzzer/TimeoutEmptyTest.cpp -o /home/buildbot/sandbox/buildbot/clang-s390x-linux/stage1/runtimes/runtimes-bins/compiler-rt/test/fuzzer/S390XDefaultLinuxConfig/Output/fuzzer-timeout.test.tmp-TimeoutEmptyTest
# executed command: /home/buildbot/sandbox/buildbot/clang-s390x-linux/stage1/./bin/clang -Wthread-safety -Wthread-safety-reference -Wthread-safety-beta --driver-mode=g++ -O2 -gline-tables-only -fsanitize=address,fuzzer -I/home/buildbot/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/lib/fuzzer /home/buildbot/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/test/fuzzer/TimeoutEmptyTest.cpp -o /home/buildbot/sandbox/buildbot/clang-s390x-linux/stage1/runtimes/runtimes-bins/compiler-rt/test/fuzzer/S390XDefaultLinuxConfig/Output/fuzzer-timeout.test.tmp-TimeoutEmptyTest
# RUN: at line 3
not  /home/buildbot/sandbox/buildbot/clang-s390x-linux/stage1/runtimes/runtimes-bins/compiler-rt/test/fuzzer/S390XDefaultLinuxConfig/Output/fuzzer-timeout.test.tmp-TimeoutTest -timeout=1 2>&1 | FileCheck /home/buildbot/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/test/fuzzer/fuzzer-timeout.test --check-prefix=TimeoutTest
# executed command: not /home/buildbot/sandbox/buildbot/clang-s390x-linux/stage1/runtimes/runtimes-bins/compiler-rt/test/fuzzer/S390XDefaultLinuxConfig/Output/fuzzer-timeout.test.tmp-TimeoutTest -timeout=1
# executed command: FileCheck /home/buildbot/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/test/fuzzer/fuzzer-timeout.test --check-prefix=TimeoutTest
# RUN: at line 12
not  /home/buildbot/sandbox/buildbot/clang-s390x-linux/stage1/runtimes/runtimes-bins/compiler-rt/test/fuzzer/S390XDefaultLinuxConfig/Output/fuzzer-timeout.test.tmp-TimeoutTest -timeout=1 /home/buildbot/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/test/fuzzer/hi.txt 2>&1 | FileCheck /home/buildbot/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/test/fuzzer/fuzzer-timeout.test --check-prefix=SingleInputTimeoutTest
# executed command: not /home/buildbot/sandbox/buildbot/clang-s390x-linux/stage1/runtimes/runtimes-bins/compiler-rt/test/fuzzer/S390XDefaultLinuxConfig/Output/fuzzer-timeout.test.tmp-TimeoutTest -timeout=1 /home/buildbot/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/test/fuzzer/hi.txt
# executed command: FileCheck /home/buildbot/sandbox/buildbot/clang-s390x-linux/llvm/compiler-rt/test/fuzzer/fuzzer-timeout.test --check-prefix=SingleInputTimeoutTest
# RUN: at line 16
/home/buildbot/sandbox/buildbot/clang-s390x-linux/stage1/runtimes/runtimes-bins/compiler-rt/test/fuzzer/S390XDefaultLinuxConfig/Output/fuzzer-timeout.test.tmp-TimeoutTest -timeout=1 -timeout_exitcode=0
# executed command: /home/buildbot/sandbox/buildbot/clang-s390x-linux/stage1/runtimes/runtimes-bins/compiler-rt/test/fuzzer/S390XDefaultLinuxConfig/Output/fuzzer-timeout.test.tmp-TimeoutTest -timeout=1 -timeout_exitcode=0
# .---command stderr------------
# | INFO: Running with entropic power schedule (0xFF, 100).
# | INFO: Seed: 89485710
# | INFO: Loaded 1 modules   (12 inline 8-bit counters): 12 [0x2aa3944be88, 0x2aa3944be94), 
# | INFO: Loaded 1 PC tables (12 PCs): 12 [0x2aa3944be98,0x2aa3944bf58), 
# | INFO: -max_len is not provided; libFuzzer will not generate inputs larger than 4096 bytes
# | INFO: A corpus is not provided, starting from an empty corpus
# | #2	INITED cov: 2 ft: 2 corp: 1/1b exec/s: 0 rss: 107Mb
# | #2209	NEW    cov: 3 ft: 3 corp: 2/2b lim: 25 exec/s: 0 rss: 107Mb L: 1/1 MS: 2 ChangeBit-ChangeBit-
# | #2232	NEW    cov: 4 ft: 4 corp: 3/4b lim: 25 exec/s: 0 rss: 107Mb L: 2/2 MS: 3 ChangeBinInt-CrossOver-InsertByte-
# | #16108	NEW    cov: 5 ft: 5 corp: 4/47b lim: 156 exec/s: 0 rss: 107Mb L: 43/43 MS: 1 InsertRepeatedBytes-
# | #16126	REDUCE cov: 5 ft: 5 corp: 4/34b lim: 156 exec/s: 0 rss: 107Mb L: 30/30 MS: 3 ChangeBinInt-ShuffleBytes-EraseBytes-
# | #16213	REDUCE cov: 5 ft: 5 corp: 4/26b lim: 156 exec/s: 0 rss: 107Mb L: 22/22 MS: 2 CrossOver-EraseBytes-
# | #16312	REDUCE cov: 5 ft: 5 corp: 4/23b lim: 156 exec/s: 0 rss: 107Mb L: 19/19 MS: 4 ChangeBit-ChangeByte-ChangeBinInt-EraseBytes-
# | #16385	REDUCE cov: 5 ft: 5 corp: 4/18b lim: 156 exec/s: 0 rss: 107Mb L: 14/14 MS: 3 CopyPart-EraseBytes-EraseBytes-
# | #16557	REDUCE cov: 6 ft: 6 corp: 5/20b lim: 156 exec/s: 0 rss: 107Mb L: 2/14 MS: 2 CrossOver-CrossOver-
# | #16599	REDUCE cov: 6 ft: 6 corp: 5/15b lim: 156 exec/s: 0 rss: 107Mb L: 9/9 MS: 2 CopyPart-EraseBytes-
# | #16615	REDUCE cov: 6 ft: 6 corp: 5/11b lim: 156 exec/s: 0 rss: 107Mb L: 5/5 MS: 1 EraseBytes-
# | #16902	REDUCE cov: 6 ft: 6 corp: 5/9b lim: 156 exec/s: 0 rss: 107Mb L: 3/3 MS: 2 CopyPart-EraseBytes-
# | ALARM: working on the last Unit for 1 seconds
# |        and the timeout value is 1 (use -timeout=N to change)
# | MS: 5 InsertByte-ShuffleBytes-ChangeByte-CrossOver-ChangeBit-; base unit: 94dd9e08c129c785f7f256e82fbe0a30e6d1ae40
# | 0x48,0x69,0x21,
# | Hi!
# | artifact_prefix='./'; Test unit written to ./timeout-c0a0ad26a634840c67a210fefdda76577b03a111
# | Base64: SGkh
# | ==1415097== ERROR: libFuzzer: timeout after 1 seconds
# | /home/buildbot/sandbox/buildbot/clang-s390x-linux/stage1/./bin/llvm-symbolizer: error: 'linux-vdso.so.1': No such file or directory
...

```

</details>

https://github.com/llvm/llvm-project/pull/215388