62 lines
2.0 KiB
Ruby
62 lines
2.0 KiB
Ruby
class Libomp < Formula
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desc "LLVM's OpenMP runtime library"
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homepage "https://openmp.llvm.org/"
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url "https://releases.llvm.org/5.0.1/openmp-5.0.1.src.tar.xz"
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sha256 "adb635cdd2f9f828351b1e13d892480c657fb12500e69c70e007bddf0fca2653"
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bottle do
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cellar :any
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sha256 "b979a1127556d48732079825ee9386df0454124b86062a1bbd9dfce4cc15e80c" => :high_sierra
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sha256 "9e869b95916c6246647f5ff75e0e117d47ba7cdde5c6d408f46e4535c2e848ec" => :sierra
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sha256 "f3b27cb2f45233a981b9a9cd62ab77fb0935857ec4b7b386c17485be1f9f6f39" => :el_capitan
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end
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depends_on "cmake" => :build
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depends_on :macos => :yosemite
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def install
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system "cmake", ".", *std_cmake_args
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system "make", "install"
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system "cmake", ".", "-DLIBOMP_ENABLE_SHARED=OFF", *std_cmake_args
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system "make", "install"
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end
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def caveats; <<~EOS
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On Apple Clang, you need to add several options to use OpenMP's front end
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instead of the standard driver option. This usually looks like
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-Xpreprocessor -fopenmp -lomp
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You might need to make sure the lib and include directories are discoverable
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if #{HOMEBREW_PREFIX} is not searched:
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-L#{opt_lib} -I#{opt_include}
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For CMake, the following flags will cause the OpenMP::OpenMP_CXX target to
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be set up correctly:
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-DOpenMP_CXX_FLAGS="-Xpreprocessor -fopenmp -I#{opt_include}" -DOpenMP_CXX_LIB_NAMES="omp" -DOpenMP_omp_LIBRARY=#{opt_lib}/libomp.dylib
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EOS
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end
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test do
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(testpath/"test.cpp").write <<~EOS
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#include <omp.h>
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#include <array>
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int main (int argc, char** argv) {
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std::array<size_t,2> arr = {0,0};
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#pragma omp parallel num_threads(2)
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{
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size_t tid = omp_get_thread_num();
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arr.at(tid) = tid + 1;
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}
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if(arr.at(0) == 1 && arr.at(1) == 2)
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return 0;
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else
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return 1;
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}
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EOS
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system ENV.cxx, "-Werror", "-Xpreprocessor", "-fopenmp", "test.cpp",
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"-L#{lib}", "-lomp", "-o", "test"
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system "./test"
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end
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end
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