[Bug 2116086] Re: Build for RVA23U64 extension profile on RISC-V

[Launchpad Bug Tracker]

** Merge proposal linked:
   https://code.launchpad.net/~xypron/ubuntu/+source/llvm-toolchain-20/+git/llvm-toolchain-20/+merge/490747

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Title:
  Build for RVA23U64 extension profile on RISC-V

Status in dpkg package in Ubuntu:
  Won't Fix
Status in gcc-14 package in Ubuntu:
  Invalid
Status in gcc-15 package in Ubuntu:
  Fix Released
Status in llvm-toolchain-20 package in Ubuntu:
  New

Bug description:
  Up to now we have been building RISC-V packages for the RV64GC
  profile. With Ubuntu 25.10 we want to move to the RVA23U64 ISA
  extension profile.

  In scripts/Dpkg/Vendor/Ubuntu.pm we have to update CPPFLAGS, CFLAGS,
  OBJCFLAGS, CXXFLAGS, OBJCXXFLAGS and add a -march= value specifying
  the extensions.

  The mandatory RVA23U64 extensions are specified in

  RVA23 Profiles, Version 1.0, 2024-10-17:
  https://drive.google.com/file/d/12QKRm92cLcEk8-5J9NI91m0fAQOxqNAq/view

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