)]}'
{
  "commit": "bb7a83ee06e6b0ded11d098e3364a66e0621ce5c",
  "tree": "279f91732b1a42b56da6a067d8d14ea131be357a",
  "parents": [
    "2bb9a54ddc3934ce2d21cce2a9d5b58fe115e3d1"
  ],
  "author": {
    "name": "bjacob",
    "email": "benoitjacob@google.com",
    "time": "Tue Jun 13 15:26:07 2023 -0400"
  },
  "committer": {
    "name": "GitHub",
    "email": "noreply@github.com",
    "time": "Tue Jun 13 19:26:07 2023 +0000"
  },
  "message": "Create empty files without unnecessary timestamp updates. (#14097)\n\nThis fixes the mysterious re-linking of `libIREECompiler` every time\r\nCMake was re-run. The problem was that `file(WRITE)` updates timestamps\r\nevery time, even if contents does not change. CMake documentation\r\nactually had a note about exactly this:\r\n\r\nhttps://cmake.org/cmake/help/latest/command/file.html#write\r\n\r\n\u003e If the file is a build input, use the\r\n[configure_file()](https://cmake.org/cmake/help/latest/command/configure_file.html#command:configure_file)\r\ncommand to update the file only when its content changes.\r\n\r\nFor the record, the tool that helped debug that was `ninja -d explain`.\r\nIt outputs things like:\r\n```\r\nninja explain: restat of output runtime/src/iree/builtins/ukernel/ukernel_bitcode.h older than most recent input runtime/src/iree/builtins/ukernel/arch/arm_64/ukernel_bitcode_arm_64.bc (1686679813375596068 vs 1686679898087480062)\r\n```",
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