tools: use clang 21 on GHA

Signed-off-by: Antoine du Hamel <duhamelantoine1995@gmail.com>

Author: aduh95

.github/workflows/build-tarball.yml

@@ -66,7 +66,7 @@ concurrency:
 env:
   PYTHON_VERSION: '3.14'
   FLAKY_TESTS: keep_retrying
-  CLANG_VERSION: '19'
+  CLANG_VERSION: '21'
   NODE_VERSION: lts/*
 
 permissions:

.github/workflows/coverage-linux-without-intl.yml

@@ -36,7 +36,7 @@ concurrency:
 env:
   PYTHON_VERSION: '3.14'
   FLAKY_TESTS: keep_retrying
-  CLANG_VERSION: '19'
+  CLANG_VERSION: '21'
   CC: ${{ (github.base_ref == 'main' || github.ref_name == 'main') && 'sccache' || '' }} clang-19
   CXX: ${{ (github.base_ref == 'main' || github.ref_name == 'main') && 'sccache' || '' }} clang++-19
   SCCACHE_GHA_ENABLED: ${{ github.base_ref == 'main' || github.ref_name == 'main' }}

.github/workflows/coverage-linux.yml

@@ -36,7 +36,7 @@ concurrency:
 env:
   PYTHON_VERSION: '3.14'
   FLAKY_TESTS: keep_retrying
-  CLANG_VERSION: '19'
+  CLANG_VERSION: '21'
   CC: ${{ (github.base_ref == 'main' || github.ref_name == 'main') && 'sccache' || '' }} clang-19
   CXX: ${{ (github.base_ref == 'main' || github.ref_name == 'main') && 'sccache' || '' }} clang++-19
   SCCACHE_GHA_ENABLED: ${{ github.base_ref == 'main' || github.ref_name == 'main' }}

.github/workflows/stress-test.yml

@@ -35,7 +35,7 @@ on:
 env:
   PYTHON_VERSION: '3.14'
   XCODE_VERSION: '16.4'
-  CLANG_VERSION: '19'
+  CLANG_VERSION: '21'
   RUSTC_VERSION: '1.88'
 
 permissions:

.github/workflows/test-internet.yml

@@ -41,7 +41,7 @@ concurrency:
 env:
   PYTHON_VERSION: '3.14'
   FLAKY_TESTS: keep_retrying
-  CLANG_VERSION: '19'
+  CLANG_VERSION: '21'
   CC: ${{ (github.base_ref == 'main' || github.ref_name == 'main') && 'sccache' || '' }} clang-19
   CXX: ${{ (github.base_ref == 'main' || github.ref_name == 'main') && 'sccache' || '' }} clang++-19
   SCCACHE_GHA_ENABLED: ${{ github.base_ref == 'main' || github.ref_name == 'main' }}

.github/workflows/test-linux-perfetto.yml

@@ -22,7 +22,7 @@ concurrency:
 env:
   PYTHON_VERSION: '3.14'
   FLAKY_TESTS: keep_retrying
-  CLANG_VERSION: '19'
+  CLANG_VERSION: '21'
   CC: ${{ (github.base_ref == 'main' || github.ref_name == 'main') && 'sccache' || '' }} clang-19
   CXX: ${{ (github.base_ref == 'main' || github.ref_name == 'main') && 'sccache' || '' }} clang++-19
   SCCACHE_GHA_ENABLED: ${{ github.base_ref == 'main' || github.ref_name == 'main' }}

.github/workflows/test-linux-quic.yml

@@ -32,7 +32,7 @@ concurrency:
 env:
   PYTHON_VERSION: '3.14'
   FLAKY_TESTS: keep_retrying
-  CLANG_VERSION: '19'
+  CLANG_VERSION: '21'
   CC: ${{ (github.base_ref == 'main' || github.ref_name == 'main') && 'sccache' || '' }} clang-19
   CXX: ${{ (github.base_ref == 'main' || github.ref_name == 'main') && 'sccache' || '' }} clang++-19
   SCCACHE_GHA_ENABLED: ${{ github.base_ref == 'main' || github.ref_name == 'main' }}

.github/workflows/test-linux.yml

@@ -41,7 +41,7 @@ concurrency:
 env:
   PYTHON_VERSION: '3.14'
   FLAKY_TESTS: keep_retrying
-  CLANG_VERSION: '19'
+  CLANG_VERSION: '21'
   CC: ${{ (github.base_ref == 'main' || github.ref_name == 'main') && 'sccache' || '' }} clang-19
   CXX: ${{ (github.base_ref == 'main' || github.ref_name == 'main') && 'sccache' || '' }} clang++-19
   SCCACHE_GHA_ENABLED: ${{ github.base_ref == 'main' || github.ref_name == 'main' }}