From 754c9aaedd9a0f0e762d1346bffc0bc4dfb1bf13 Mon Sep 17 00:00:00 2001
From: Andy Lee <andylizf@outlook.com>
Date: Sat, 9 Aug 2025 16:55:47 -0700
Subject: [PATCH] fix: add abseil library path for protobuf compilation on
 macOS
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

- Include abseil in CMAKE_PREFIX_PATH for both Intel and Apple Silicon Macs
- Add explicit absl_DIR CMake variable to help find abseil for protobuf
- Fixes 'absl/log/absl_log.h' file not found error during compilation

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>
---
 .github/workflows/build-reusable.yml | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/.github/workflows/build-reusable.yml b/.github/workflows/build-reusable.yml
index c23743d..a3db2dc 100644
--- a/.github/workflows/build-reusable.yml
+++ b/.github/workflows/build-reusable.yml
@@ -108,6 +108,7 @@ jobs:
         if: runner.os == 'macOS'
         run: |
           # Don't install LLVM, use system clang for better compatibility
+          # abseil is automatically installed as a dependency of protobuf
           brew install libomp boost protobuf zeromq
 
       - name: Install build dependencies
@@ -126,13 +127,13 @@ jobs:
           if [ -d "/opt/homebrew/opt/libomp" ]; then
             echo "HOMEBREW_PREFIX=/opt/homebrew" >> $GITHUB_ENV
             echo "OpenMP_ROOT=/opt/homebrew/opt/libomp" >> $GITHUB_ENV
-            echo "CMAKE_PREFIX_PATH=/opt/homebrew/opt/libomp:/opt/homebrew/opt/boost:/opt/homebrew/opt/protobuf:/opt/homebrew/opt/zeromq" >> $GITHUB_ENV
+            echo "CMAKE_PREFIX_PATH=/opt/homebrew/opt/libomp:/opt/homebrew/opt/boost:/opt/homebrew/opt/protobuf:/opt/homebrew/opt/zeromq:/opt/homebrew/opt/abseil" >> $GITHUB_ENV
             echo "LDFLAGS=-L/opt/homebrew/opt/libomp/lib" >> $GITHUB_ENV
             echo "CPPFLAGS=-I/opt/homebrew/opt/libomp/include" >> $GITHUB_ENV
           elif [ -d "/usr/local/opt/libomp" ]; then
             echo "HOMEBREW_PREFIX=/usr/local" >> $GITHUB_ENV
             echo "OpenMP_ROOT=/usr/local/opt/libomp" >> $GITHUB_ENV
-            echo "CMAKE_PREFIX_PATH=/usr/local/opt/libomp:/usr/local/opt/boost:/usr/local/opt/protobuf:/usr/local/opt/zeromq" >> $GITHUB_ENV
+            echo "CMAKE_PREFIX_PATH=/usr/local/opt/libomp:/usr/local/opt/boost:/usr/local/opt/protobuf:/usr/local/opt/zeromq:/usr/local/opt/abseil" >> $GITHUB_ENV
             echo "LDFLAGS=-L/usr/local/opt/libomp/lib" >> $GITHUB_ENV
             echo "CPPFLAGS=-I/usr/local/opt/libomp/include" >> $GITHUB_ENV
           fi
@@ -153,8 +154,8 @@ jobs:
             export CC=clang
             export CXX=clang++
             export MACOSX_DEPLOYMENT_TARGET=11.0
-            # Ensure CMake can find all Homebrew packages
-            export CMAKE_ARGS="-DOpenMP_ROOT=${OpenMP_ROOT} -DCMAKE_PREFIX_PATH=${CMAKE_PREFIX_PATH}"
+            # Ensure CMake can find all Homebrew packages including abseil for protobuf
+            export CMAKE_ARGS="-DOpenMP_ROOT=${OpenMP_ROOT} -DCMAKE_PREFIX_PATH=${CMAKE_PREFIX_PATH} -Dabsl_DIR=${HOMEBREW_PREFIX}/opt/abseil/lib/cmake/absl"
             uv build --wheel --python python
           else
             uv build --wheel --python python
@@ -169,8 +170,8 @@ jobs:
             export CXX=clang++
             # DiskANN requires macOS 13.3+ for sgesdd_ LAPACK function
             export MACOSX_DEPLOYMENT_TARGET=13.3
-            # Ensure CMake can find all Homebrew packages
-            export CMAKE_ARGS="-DOpenMP_ROOT=${OpenMP_ROOT} -DCMAKE_PREFIX_PATH=${CMAKE_PREFIX_PATH}"
+            # Ensure CMake can find all Homebrew packages including abseil for protobuf
+            export CMAKE_ARGS="-DOpenMP_ROOT=${OpenMP_ROOT} -DCMAKE_PREFIX_PATH=${CMAKE_PREFIX_PATH} -Dabsl_DIR=${HOMEBREW_PREFIX}/opt/abseil/lib/cmake/absl"
             uv build --wheel --python python
           else
             uv build --wheel --python python