https://www.fs.com/products/110529.html
Arista Networks QDD-400G-LR4 Compatible 400GBASE-LR4 QSFP-DD PAM4 1310nm 10km DOM Duplex LC/UPC SMF Optical Transceiver Module, Product Specification:Arista...
arista networksqddcompatibleqsfp
https://www.intel.com/content/www/us/en/docs/dpcpp-cpp-compiler/developer-guide-reference/2024-0/dd-qdd.html
Same as option -dM, but outputs #define directives in preprocessed source.
dd