icu-devtools is already the newest version (72.1-3ubuntu2).
libicu-dev is already the newest version (72.1-3ubuntu2).
libicu72 is already the newest version (72.1-3ubuntu2).
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
```
I am pretty new to postgresql's source code and don't yet know whats the use of ICU libs. So I tried building it with --without-icu and it worked. But I am not able to figure out whats going wrong here with ICU libs. It would be good if I can get a proper, clean build.