[llvm] figure out why arm build is failing (PR #146580)

[Amy Huang via llvm-commits]

https://github.com/amykhuang updated https://github.com/llvm/llvm-project/pull/146580

>From bc0f46b351e32dc44f8bf84ed80f593173eb48f0 Mon Sep 17 00:00:00 2001
From: Amy Huang <akhuang at google.com>
Date: Tue, 1 Jul 2025 10:53:10 -0700
Subject: [PATCH 1/4] figure out why arm build is failing

---
 .github/workflows/libc-fullbuild-tests.yml | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/libc-fullbuild-tests.yml b/.github/workflows/libc-fullbuild-tests.yml
index 24d75f58d45e0..cac80c0f4ad3f 100644
--- a/.github/workflows/libc-fullbuild-tests.yml
+++ b/.github/workflows/libc-fullbuild-tests.yml
@@ -15,9 +15,16 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        build_type: [Debug, Release, MinSizeRel]
         include:
           - os: ubuntu-24.04
+            build_type: Debug
+            ccache-variant: sccache
+            c_compiler: clang-21
+            cpp_compiler: clang++-21
+            target: x86_64-unknown-linux-llvm
+            include_scudo: ON
+          - os: ubuntu-24.04
+            build_type: MinSizeRel
             ccache-variant: sccache
             c_compiler: clang-21
             cpp_compiler: clang++-21
@@ -25,12 +32,14 @@ jobs:
             include_scudo: ON
           # TODO: remove ccache logic when https://github.com/hendrikmuhs/ccache-action/issues/279 is resolved.
           - os: ubuntu-24.04-arm
+            build_type: Debug
             ccache-variant: ccache
             c_compiler: clang-21
             cpp_compiler: clang++-21
             target: aarch64-unknown-linux-llvm
             include_scudo: ON
           - os: ubuntu-24.04
+            build_type: Debug
             ccache-variant: ccache
             c_compiler: clang-21
             cpp_compiler: clang++-21

>From 33e2fcdc44fa4e35b1c9f20f074b28527ce2b547 Mon Sep 17 00:00:00 2001
From: Amy Huang <akhuang at google.com>
Date: Tue, 1 Jul 2025 11:09:44 -0700
Subject: [PATCH 2/4] more edits

---
 .github/workflows/libc-overlay-tests.yml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/.github/workflows/libc-overlay-tests.yml b/.github/workflows/libc-overlay-tests.yml
index da82d8d9fe8ab..b7814b2a6fe46 100644
--- a/.github/workflows/libc-overlay-tests.yml
+++ b/.github/workflows/libc-overlay-tests.yml
@@ -17,6 +17,7 @@ jobs:
       fail-fast: false
       matrix:
         build_type: [Debug, Release, MinSizeRel]
+        os: [ubuntu-24.04,ubuntu-24.04-arm, windows-2022, windows-2025, macos-14]
         include:
           # TODO: add linux gcc when it is fixed
           - os: ubuntu-24.04
@@ -119,3 +120,4 @@ jobs:
         --build ${{ steps.strings.outputs.build-output-dir }} 
         --parallel 
         --target check-libc
+        -- -v

>From c208aa5310b06db0d17ffc2282e5ce538fed60e1 Mon Sep 17 00:00:00 2001
From: Amy Huang <akhuang at google.com>
Date: Tue, 1 Jul 2025 11:20:47 -0700
Subject: [PATCH 3/4] more edits

---
 .github/workflows/libc-overlay-tests.yml | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/.github/workflows/libc-overlay-tests.yml b/.github/workflows/libc-overlay-tests.yml
index b7814b2a6fe46..19390dc4966c3 100644
--- a/.github/workflows/libc-overlay-tests.yml
+++ b/.github/workflows/libc-overlay-tests.yml
@@ -16,7 +16,7 @@ jobs:
       # Set fail-fast to false to ensure that feedback is delivered for all matrix combinations.
       fail-fast: false
       matrix:
-        build_type: [Debug, Release, MinSizeRel]
+        build_type: [Debug]
         os: [ubuntu-24.04,ubuntu-24.04-arm, windows-2022, windows-2025, macos-14]
         include:
           # TODO: add linux gcc when it is fixed
@@ -111,7 +111,6 @@ jobs:
         cmake 
         --build ${{ steps.strings.outputs.build-output-dir }} 
         --parallel 
-        --config MinSizeRel 
         --target libc
 
     - name: Test

>From 20768dca82ebd9d945e65de09a92e41fc255d0a7 Mon Sep 17 00:00:00 2001
From: Amy Huang <akhuang at google.com>
Date: Tue, 1 Jul 2025 11:29:59 -0700
Subject: [PATCH 4/4] test different clang version

---
 .github/workflows/libc-fullbuild-tests.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/libc-fullbuild-tests.yml b/.github/workflows/libc-fullbuild-tests.yml
index cac80c0f4ad3f..e5458827e0af7 100644
--- a/.github/workflows/libc-fullbuild-tests.yml
+++ b/.github/workflows/libc-fullbuild-tests.yml
@@ -34,8 +34,8 @@ jobs:
           - os: ubuntu-24.04-arm
             build_type: Debug
             ccache-variant: ccache
-            c_compiler: clang-21
-            cpp_compiler: clang++-21
+            c_compiler: /usr/bin/clang
+            cpp_compiler: /usr/bin/clang
             target: aarch64-unknown-linux-llvm
             include_scudo: ON
           - os: ubuntu-24.04