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.coop...@citrix.com>
---
CC: Anthony PERARD <anthony.per...@vates.tech>
CC: Michal Orzel <michal.or...@amd.com>
CC: Jan Beulich <jbeul...@suse.com>
CC: Julien Grall <jul...@xen.org>
CC: Roger Pau Monné <roger....@citrix.com>
CC: Stefano Stabellini <sstabell...@kernel.org>
CC: Volodymyr Babchuk <volodymyr_babc...@epam.com>
CC: Bertrand Marquis <bertrand.marq...@arm.com>
CC: Oleksii Kurochko <oleksii.kuroc...@gmail.com>
CC: Shawn Anastasio <sanasta...@raptorengineering.com>
PPC doesn't have a minimum set stated yet, but CI tests GCC 10 from Debian 11.
This will require dropping some containers from CI. CentOS 7 notably.
In terms of specific new features, I'm interested in:
* __has_include() to remove the asm-generic makefile tangle
* asm goto (), to remove .fixup and code generation for error handling.
and these too, but will require MISRA adjustments:
* _Generic() to make properly const-preserving wrappers
* Updating our -std to gnu11, which drops further compatibility logic
When the arguments die down, I'll add a hunk to CHANGELOG.md as this is very
significant.
---
README | 13 +++++--------
1 file changed, 5 insertions(+), 8 deletions(-)
diff --git a/README b/README
index 9d9c6fc324c6..be90be3910d4 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
base-commit: ac29d63a0fa6a3ed98ecf86f95995811c301308f
--
2.39.5
