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cmake: allow overriding hardcoded libomp path on macOS #65

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cmake: allow overriding hardcoded libomp path on macOS #65

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14 changes: 7 additions & 7 deletions CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -75,15 +75,15 @@ set(KALIGN_KMEANS_UPGMA_THRESHOLD "50" CACHE STRING "Number of sequences thresho


if(USE_OPENMP)
# Configure OpenMP for macOS with Homebrew (only for arm64 native builds)
if(APPLE AND CMAKE_HOST_SYSTEM_PROCESSOR MATCHES "arm64" AND NOT CMAKE_OSX_ARCHITECTURES MATCHES "x86_64")
list(APPEND CMAKE_PREFIX_PATH /opt/homebrew)
# Set OpenMP flags for Apple Clang + Homebrew libomp
set(OpenMP_C_FLAGS "-Xpreprocessor -fopenmp -I/opt/homebrew/opt/libomp/include")
# Configure OpenMP for macOS with external libomp (only for Apple Clang on arm64 native builds)
if(APPLE AND CMAKE_HOST_SYSTEM_PROCESSOR MATCHES "arm64" AND NOT CMAKE_OSX_ARCHITECTURES MATCHES "x86_64" AND CMAKE_C_COMPILER_ID STREQUAL "AppleClang")
# Defaults to Homebrew
set(LIBOMP_ROOT "/opt/homebrew/opt/libomp" CACHE PATH "libomp install prefix")
set(OpenMP_C_FLAGS "-Xpreprocessor -fopenmp -I${LIBOMP_ROOT}/include")
set(OpenMP_C_LIB_NAMES "omp")
set(OpenMP_CXX_FLAGS "-Xpreprocessor -fopenmp -I/opt/homebrew/opt/libomp/include")
set(OpenMP_CXX_FLAGS "-Xpreprocessor -fopenmp -I${LIBOMP_ROOT}/include")
set(OpenMP_CXX_LIB_NAMES "omp")
set(OpenMP_omp_LIBRARY /opt/homebrew/opt/libomp/lib/libomp.dylib)
set(OpenMP_omp_LIBRARY "${LIBOMP_ROOT}/lib/libomp.dylib")
endif()

find_package(OpenMP)
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