Update FindTBB.cmake

[zaidtahirbutt]

Replaced line 187 "file(READ "${TBB_INCLUDE_DIRS}/tbb/tbb_stddef.h" _tbb_version_file)" with "file(READ "/usr/include/oneapi/tbb/version.h" _tbb_version_file)" since latest version of tbb does not contain the file "tbb_stddef.h" which causes errors and failure in compilation of OpenFPGA. Replacing with this line solved the issue and OpenFPGA was compiled on Ubuntu 22.04.

Motivate of the pull request

• To address an existing issue. If so, please provide a link to the issue:
• Breaking new feature. If so, please describe details in the description part.

Describe the technical details

What is currently done? (Provide issue link if applicable)

What does this pull request change?

Which part of the code base require a change

• VPR
• Tileable routing architecture generator
• OpenFPGA libraries
• FPGA-Verilog
• FPGA-Bitstream
• FPGA-SDC
• FPGA-SPICE
• Flow scripts
• Architecture library
• Cell library
• Documentation
• Regression tests
• Continous Integration (CI) scripts

Impact of the pull request

• Require a change on Quality of Results (QoR)
• Break back-compatibility. If so, please list who may be influenced.

[zaidtahirbutt]

Replaced line 187 "file(READ "${TBB_INCLUDE_DIRS}/tbb/tbb_stddef.h" _tbb_version_file)" with "file(READ "/usr/include/oneapi/tbb/version.h" _tbb_version_file)" since latest version of tbb does not contain the file "tbb_stddef.h" which causes errors and failure in compilation of OpenFPGA. Replacing with this line solved the issue and OpenFPGA was compiled on Ubuntu 22.04

[tangxifan]

@zaidtahirbutt I am actually looking for a general purpose CMake module to find TBB packages, such as

• https://github.com/justusc/FindTBB

As we plan to support multiple OS platforms (as stated in #905), I suggest to avoid fixed paths when spotting TBB packages.

Let me know what you think.