[PATCH v1 0/2] nolibc updates for Linux 5.20

[Ammar Faizi <ammarfaizi2@gnuweeb.org>]

Hi Willy,
Hi Paul,

Not much to do this time. Only small nolibc updates here. There are two
patches in this series.

1. Address Willy's comment about overflow checking in the multiplication
   operation [1]. This patch supports overflow checking for older
   compiler versions. Currently, we use `__builtin_mul_overflow()` that
   doesn't exist in older compiler versions. Instead of using this
   built-in, use a simple division to check for overflow in the `calloc()`
   function.

2. The compiler can warn us about wrong `printf` arguments. This patch
   enables the warnings. Currently, only two functions use this attribute:
   `printf` and `fprintf`.

Hopefully, I can send more updates for 5.21+.

Thank you!

Link: https://lore.kernel.org/lkml/20220330024114.GA18892@1wt.eu [1]
Signed-off-by: Alviro Iskandar Setiawan <alviro.iskandar@gnuweeb.org>
Signed-off-by: Ammar Faizi <ammarfaizi2@gnuweeb.org>
---

Alviro Iskandar Setiawan (1):
  tools/nolibc/stdio: Add format attribute to enable printf warnings

Ammar Faizi (1):
  tools/nolibc/stdlib: Support overflow checking for older compiler versions

 tools/include/nolibc/stdio.h  | 4 ++--
 tools/include/nolibc/stdlib.h | 7 +++----
 2 files changed, 5 insertions(+), 6 deletions(-)


base-commit: 9a9e459ed0e76710f1258b6c1d4c0316b52b4b08
prerequisite-patch-id: e4a9acdc12961f2d4c6bb99e4790b8ffa9d15174
prerequisite-patch-id: 5a618e6a72c7d2beef4ba2c2cf01dadfbaf9a996
prerequisite-patch-id: 1bcffd448f6984eee80d86560af19672cd4ae716
prerequisite-patch-id: 3e31c80bd4dd532e30b4bba76e5d98647e21184b
prerequisite-patch-id: 34e531967a67791d5b3c3e071527de7235715906
prerequisite-patch-id: 14105c6ae9dcc068ddf12a7c1bf431066199b813
prerequisite-patch-id: 4299173943ea579f538da00488fb1a7b1a690a79
prerequisite-patch-id: dd85164f2ec9eb8cea64ab801abac614f9d0c8f5
prerequisite-patch-id: 2c1b940635d1564e26b9959eb57cf9fa6983cb2f
-- 
Ammar Faizi