Fetching ISPC compiler

[billfanyuvr]

my hardware system is :
Welcome to Ubuntu 24.04.1 LTS (GNU/Linux 6.8.0-49-generic x86_64)
sudo git clone https://github.com/isl-org/Open3D.git
i can see the files: xxxxx/Open3D$ ls
3rdparty 3rdparty_downloads build CHANGELOG.md cmake CMakeLists.txt cpp docker docs examples LICENSE python README.md SECURITY.md util
xxxxx:/api3d/Open3D$ cat README.md
Pre-built pip packages support Ubuntu 20.04+, macOS 10.15+ and Windows 10+
(64-bit) with Python 3.8-3.11.
.......after:
util/install_deps_ubuntu.sh
when i : sudo cmake ..
the bug is: ========attention====
-- Open3D 0.18.0+b65896f72
-- Found Python3: /usr/bin/python3.12 (found suitable version "3.12.3", minimum required is "3.6") found components: Interpreter Development Development.Module Development.Embed
-- Fetching ISPC compiler
======= stop here=====
check :
Open3D$ which ispc
/usr/local/bin/ispc
xxxxx:/api3d/Open3D$ ispc --version
Intel(r) Implicit SPMD Program Compiler (Intel(r) ISPC), 1.20.0 (build commit 14bd04aa7e68cd33 @ 20230506, LLVM 15.0.7)
how to fix it? change the system for ubuntu 20.04