[Buildroot] [PATCH] package/fmt: fix 32-bit builds

From: Michael Nosthoff via buildroot <buildroot@buildroot.org>
To: buildroot@buildroot.org
Cc: Semyon Kolganov <semenak94@mail.ru>
Subject: [Buildroot] [PATCH] package/fmt: fix 32-bit builds
Date: Wed,  8 Jul 2026 09:23:52 +0200	[thread overview]
Message-ID: <20260708072408.19685-2-buildroot@heine.tech> (raw)

Provide a fallback when native __int128 is not available.

Fixes:
https://autobuild.buildroot.org/results/39df217ad5a1036d5e606ae0e8291d885e9d0e1a/

Signed-off-by: Michael Nosthoff <buildroot@heine.tech>
---
 ...001-fix-fallback-uint128-bitwise-not.patch | 42 +++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 package/fmt/0001-fix-fallback-uint128-bitwise-not.patch

diff --git a/package/fmt/0001-fix-fallback-uint128-bitwise-not.patch b/package/fmt/0001-fix-fallback-uint128-bitwise-not.patch
new file mode 100644
index 0000000000..123c43ab2c
--- /dev/null
+++ b/package/fmt/0001-fix-fallback-uint128-bitwise-not.patch
@@ -0,0 +1,42 @@
+From 588b3a0f8f6a8bcf2a959cae882d5b2703e86737 Mon Sep 17 00:00:00 2001
+From: Vinay Kumar <vkslog69@gmail.com>
+Date: Thu, 18 Jun 2026 12:22:12 +0530
+Subject: [PATCH] Fix fallback uint128 bitwise not (#4813)
+
+Upstream: https://github.com/fmtlib/fmt/commit/588b3a0f8f6a8bcf2a959cae882d5b2703e86737
+Signed-off-by: Michael Nosthoff <buildroot@heine.tech>
+---
+ include/fmt/format.h | 3 +++
+ test/format-test.cc  | 5 +++++
+ 2 files changed, 8 insertions(+)
+
+diff --git a/include/fmt/format.h b/include/fmt/format.h
+index 5044befdd863..570627922c62 100644
+--- a/include/fmt/format.h
++++ b/include/fmt/format.h
+@@ -326,6 +326,9 @@ class uint128 {
+       -> uint128 {
+     return {lhs.hi_ & rhs.hi_, lhs.lo_ & rhs.lo_};
+   }
++  friend constexpr auto operator~(const uint128& n) -> uint128 {
++    return {~n.hi_, ~n.lo_};
++  }
+   friend FMT_CONSTEXPR auto operator+(const uint128& lhs, const uint128& rhs)
+       -> uint128 {
+     auto result = uint128(lhs);
+diff --git a/test/format-test.cc b/test/format-test.cc
+index 9a2258d5921f..8c2670a19fc3 100644
+--- a/test/format-test.cc
++++ b/test/format-test.cc
+@@ -82,6 +82,11 @@ TEST(uint128_test, minus) {
+   EXPECT_EQ(n - 2, 40);
+ }
+ 
++TEST(uint128_test, bitwise_not) {
++  auto n = ~uint128(0x123456789abcdef0, 0x0fedcba987654321);
++  EXPECT_EQ(n, uint128(0xedcba9876543210f, 0xf0123456789abcde));
++}
++
+ TEST(uint128_test, plus_assign) {
+   auto n = uint128(32);
+   n += uint128(10);
-- 
2.43.0

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