See discussion on https://reviews.llvm.org/D92902 which introduced the problem.

On my machine it fails as below. It appears 'touch' does not like the date for whatever reason. This means I'm not able to build 12.0.0-rc1.



********************
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90
FAIL: LLVM :: tools/llvm-elfabi/preserve-dates-tbe.test (39967 of 42071)
******************** TEST 'LLVM :: tools/llvm-elfabi/preserve-dates-tbe.test' FAILED ********************
Script:
--
: 'RUN: at line 3';   llvm-elfabi --elf c:\src\llvm_package_1200-rc1\llvm-project\llvm\test\tools\llvm-elfabi/Inputs/gnu_hash.so --emit-tbe=c:\src\llvm_package_1200-rc1\build32_stage0\test\tools\llvm-elfabi\Output\preserve-dates-tbe.test.tmp
: 'RUN: at line 4';   touch -m -t 197001010000 c:\src\llvm_package_1200-rc1\build32_stage0\test\tools\llvm-elfabi\Output\preserve-dates-tbe.test.tmp
: 'RUN: at line 5';   llvm-elfabi --elf c:\src\llvm_package_1200-rc1\llvm-project\llvm\test\tools\llvm-elfabi/Inputs/gnu_hash.so --emit-tbe=c:\src\llvm_package_1200-rc1\build32_stage0\test\tools\llvm-elfabi\Output\preserve-dates-tbe.test.tmp --write-if-changed
: 'RUN: at line 6';   ls -l c:\src\llvm_package_1200-rc1\build32_stage0\test\tools\llvm-elfabi\Output\preserve-dates-tbe.test.tmp | c:\src\llvm_package_1200-rc1\build32_stage0\bin\filecheck.exe --allow-unused-prefixes=false c:\src\llvm_package_1200-rc1\llvm-project\llvm\test\tools\llvm-elfabi\preserve-dates-tbe.test
--
Exit Code: 1

Command Output (stdout):
--
$ ":" "RUN: at line 3"
$ "llvm-elfabi" "--elf" "c:\src\llvm_package_1200-rc1\llvm-project\llvm\test\tools\llvm-elfabi/Inputs/gnu_hash.so" "--emit-tbe=c:\src\llvm_package_1200-rc1\build32_stage0\test\tools\llvm-elfabi\Output\preserve-dates-tbe.test.tmp"
$ ":" "RUN: at line 4"
$ "touch" "-m" "-t" "197001010000" "c:\src\llvm_package_1200-rc1\build32_stage0\test\tools\llvm-elfabi\Output\preserve-dates-tbe.test.tmp"
# command stderr:
touch: invalid date format `197001010000'

error: command failed with exit status: 1

--

********************
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90..
********************
Failed Tests (2):
  LLVM :: tools/llvm-elfabi/preserve-dates-stub.test
  LLVM :: tools/llvm-elfabi/preserve-dates-tbe.test