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flang: support OpenMP, use shared libs on Linux #204626

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merged 2 commits into from
Jan 18, 2025
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flang: support OpenMP, use shared libs on Linux #204626

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deabc69
flang: support OpenMP, use shared libs on Linux
cho-m Jan 17, 2025
09aab3d
flang: update 19.1.7 bottle.
BrewTestBot Jan 18, 2025
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9 changes: 8 additions & 1 deletion Formula/f/flang.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -31,9 +31,12 @@ def flang_driver
end

def install
# Generate omp_lib.h and omp_lib.F90 to be used by flang build
system "cmake", "-S", "openmp", "-B", "build/projects/openmp", *std_cmake_args

llvm = Formula["llvm"]
# NOTE: Setting `BUILD_SHARED_LIBRARIES=ON` causes the just-built flang to throw ICE.
args = %W[
-DLLVM_TOOL_OPENMP_BUILD=ON
-DCLANG_DIR=#{llvm.opt_lib}/cmake/clang
-DFLANG_INCLUDE_TESTS=OFF
-DFLANG_REPOSITORY_STRING=#{tap&.issues_url}
Expand All @@ -46,6 +49,8 @@ def install
-DMLIR_DIR=#{llvm.opt_lib}/cmake/mlir
]
args << "-DFLANG_VENDOR_UTI=sh.brew.flang" if tap&.official?
# FIXME: Setting `BUILD_SHARED_LIBS=ON` causes the just-built flang to throw ICE on macOS
args << "-DBUILD_SHARED_LIBS=ON" if OS.linux?

ENV.append_to_cflags "-ffat-lto-objects" if OS.linux? # Unsupported on macOS.
system "cmake", "-S", "flang", "-B", "build", *args, *std_cmake_args
Expand Down Expand Up @@ -127,6 +132,8 @@ def caveats
system bin/flang_driver, "-v", "test.f90", "-o", "test"
assert_equal "Done", shell_output("./test").chomp

return if OS.linux?

system "ar", "x", lib/"libFortranCommon.a"
testpath.glob("*.o").each do |object_file|
refute_match(/^LLVM (IR )?bitcode/, shell_output("file --brief #{object_file}"))
Expand Down
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