[UNIKRAFT PATCH v5 0/3] Add clang support

[Vlad-Andrei Badoiu <vlad_andrei.badoiu@xxxxxx>]

We add support for clang on Unikraft. This is an
adapted series of the previous series of patches
by Alice Suiu.

Changes since v1:
- Add missing check for lto
- Fixed typo in have_gcc

Changes since v2:
- Removed the filter out
- Added a more flexible approach to select the COMPILER,
  now we can use .config, environment variable, and
  command line
- Rebased on staging

Changes since v3:
- Fixed several style issues

Changes since v4:
- Fixed problem when using cross compiling
- Fixed gcc_version_ge

Vlad-Andrei Badoiu (3):
  build: Option to configure the compiler
  support/build: Add build functions for clang and gcc check
  build: Add support for clang

 Makefile                     | 14 ++++++++++++--
 Makefile.uk                  | 15 +++++++++++----
 arch/x86/x86_64/Makefile.uk  |  9 ++++++---
 support/build/Makefile.rules | 12 +++++++++++-
 4 files changed, 40 insertions(+), 10 deletions(-)

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2.27.0