[xen staging] xen: Update toolchain requirements to GCC 5.1/Binutils 2.25 or Clang/LLVM 11

[patchbot@xxxxxxx]

commit aa78a7d10c6c2ef877b34d119a6db934c201ddfd
Author:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
AuthorDate: Fri Mar 7 17:29:10 2025 +0000
Commit:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Wed Mar 19 16:44:00 2025 +0000

    xen: Update toolchain requirements to GCC 5.1/Binutils 2.25 or Clang/LLVM 11
    
    GCC 4.1.2 is from 2007, and Binutils 2.16 is a similar vintage.  Clang 3.5 
is
    from 2014.  Supporting toolchains this old is a massive development and
    testing burden.
    
    Set a minimum baseline of GCC 5.1 across the board, along with Binutils 2.25
    which is the same age.  These were chosen *3 years ago* as Linux's minimum
    requirements because even back then, they were ubiquitous in distros.  
Choose
    Clang/LLVM 11 as a baseline for similar reasons; the Linux commit making 
this
    change two years ago cites a laudry list of code generation bugs.
    
    This will allow us to retire a lot of compatiblity logic, and start using 
new
    features previously unavailable because of no viable compatibility option.
    
    Merge the ARM 32bit and 64bit sections now they're the same.
    
    Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Acked-by: Julien Grall <jgrall@xxxxxxxxxx>
    Acked-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
---
 README | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/README b/README
index 9d9c6fc324..be90be3910 100644
--- a/README
+++ b/README
@@ -38,16 +38,13 @@ provided by your OS distributor:
     * GNU Make v3.80 or later
     * C compiler and linker:
       - For x86:
-        - GCC 4.1.2_20070115 or later
-        - GNU Binutils 2.16.91.0.5 or later
+        - GCC 5.1 or later
+        - GNU Binutils 2.25 or later
         or
-        - Clang/LLVM 3.5 or later
-      - For ARM 32-bit:
-        - GCC 4.9 or later
-        - GNU Binutils 2.24 or later
-      - For ARM 64-bit:
+        - Clang/LLVM 11 or later
+      - For ARM:
         - GCC 5.1 or later
-        - GNU Binutils 2.24 or later
+        - GNU Binutils 2.25 or later
       - For RISC-V 64-bit:
         - GCC 12.2 or later
         - GNU Binutils 2.39 or later
--
generated by git-patchbot for /home/xen/git/xen.git#staging