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homebrew-core/Formula/llvm.rb

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class Llvm < Formula
desc "Next-gen compiler infrastructure"
homepage "https://llvm.org/"
url "https://github.com/llvm/llvm-project/releases/download/llvmorg-12.0.0/llvm-project-12.0.0.src.tar.xz"
sha256 "9ed1688943a4402d7c904cc4515798cdb20080066efa010fe7e1f2551b423628"
# The LLVM Project is under the Apache License v2.0 with LLVM Exceptions
license "Apache-2.0" => { with: "LLVM-exception" }
revision 1
head "https://github.com/llvm/llvm-project.git", branch: "main"
livecheck do
url :homepage
regex(/LLVM (\d+\.\d+\.\d+)/i)
end
bottle do
sha256 cellar: :any, arm64_big_sur: "4c8e51f4be4bd897f7eff223409c7215afa87dc6dfe943b90f6a719fa99505b0"
sha256 cellar: :any, big_sur: "a72f029b6c0dbb708b1da7a0fee2ff771adce0141f891145d4cd04dcc74c8f08"
sha256 cellar: :any, catalina: "647ff05ed5d5edcf5be265a731bdfbae67ff2a3a1c4d077bbe3084c9319838f0"
sha256 cellar: :any, mojave: "9231c5c2edb2c0d5226bec12cf1fe40b92beedbdf2fcc03585aa1f0a5d9ae2bc"
end
# Clang cannot find system headers if Xcode CLT is not installed
pour_bottle? only_if: :clt_installed
keg_only :provided_by_macos
# https://llvm.org/docs/GettingStarted.html#requirement
# We intentionally use Make instead of Ninja.
# See: Homebrew/homebrew-core/issues/35513
depends_on "cmake" => :build
depends_on "swig" => :build
depends_on "python@3.9"
uses_from_macos "libedit"
uses_from_macos "libffi", since: :catalina
uses_from_macos "libxml2"
uses_from_macos "ncurses"
uses_from_macos "zlib"
on_linux do
depends_on "pkg-config" => :build
depends_on "binutils" # needed for gold
depends_on "libelf" # openmp requires <gelf.h>
end
def install
projects = %w[
clang
clang-tools-extra
lld
lldb
openmp
polly
mlir
]
runtimes = %w[
compiler-rt
libcxx
libcxxabi
libunwind
]
py_ver = Language::Python.major_minor_version("python3")
site_packages = Language::Python.site_packages("python3").delete_prefix("lib/")
# Apple's libstdc++ is too old to build LLVM
ENV.libcxx if ENV.compiler == :clang
# compiler-rt has some iOS simulator features that require i386 symbols
# I'm assuming the rest of clang needs support too for 32-bit compilation
# to work correctly, but if not, perhaps universal binaries could be
# limited to compiler-rt. llvm makes this somewhat easier because compiler-rt
# can almost be treated as an entirely different build from llvm.
ENV.permit_arch_flags
# we install the lldb Python module into libexec to prevent users from
# accidentally importing it with a non-Homebrew Python or a Homebrew Python
# in a non-default prefix
args = %W[
-DLLVM_ENABLE_PROJECTS=#{projects.join(";")}
-DLLVM_ENABLE_RUNTIMES=#{runtimes.join(";")}
-DLLVM_POLLY_LINK_INTO_TOOLS=ON
-DLLVM_BUILD_EXTERNAL_COMPILER_RT=ON
-DLLVM_LINK_LLVM_DYLIB=ON
-DLLVM_ENABLE_EH=ON
-DLLVM_ENABLE_FFI=ON
-DLLVM_ENABLE_RTTI=ON
-DLLVM_INCLUDE_DOCS=OFF
-DLLVM_INCLUDE_TESTS=OFF
-DLLVM_INSTALL_UTILS=ON
-DLLVM_ENABLE_Z3_SOLVER=OFF
-DLLVM_OPTIMIZED_TABLEGEN=ON
-DLLVM_TARGETS_TO_BUILD=all
-DLLDB_USE_SYSTEM_DEBUGSERVER=ON
-DLLDB_ENABLE_PYTHON=ON
-DLLDB_ENABLE_LUA=OFF
-DLLDB_ENABLE_LZMA=ON
-DLLDB_PYTHON_RELATIVE_PATH=libexec/#{site_packages}
-DLIBOMP_INSTALL_ALIASES=OFF
-DCLANG_PYTHON_BINDINGS_VERSIONS=#{py_ver}
]
if MacOS.version >= :catalina
args << "-DFFI_INCLUDE_DIR=#{MacOS.sdk_path}/usr/include/ffi"
args << "-DFFI_LIBRARY_DIR=#{MacOS.sdk_path}/usr/lib"
else
args << "-DFFI_INCLUDE_DIR=#{Formula["libffi"].opt_include}"
args << "-DFFI_LIBRARY_DIR=#{Formula["libffi"].opt_lib}"
end
on_macos do
args << "-DLLVM_BUILD_LLVM_C_DYLIB=ON"
args << "-DLLVM_ENABLE_LIBCXX=ON"
args << "-DLLVM_CREATE_XCODE_TOOLCHAIN=#{MacOS::Xcode.installed? ? "ON" : "OFF"}"
args << "-DRUNTIMES_CMAKE_ARGS=-DCMAKE_INSTALL_RPATH=@loader_path/../lib"
sdk = MacOS.sdk_path_if_needed
args << "-DDEFAULT_SYSROOT=#{sdk}" if sdk
end
on_linux do
args << "-DLLVM_ENABLE_LIBCXX=OFF"
args << "-DLLVM_CREATE_XCODE_TOOLCHAIN=OFF"
args << "-DCLANG_DEFAULT_CXX_STDLIB=libstdc++"
# Enable llvm gold plugin for LTO
args << "-DLLVM_BINUTILS_INCDIR=#{Formula["binutils"].opt_include}"
end
llvmpath = buildpath/"llvm"
mkdir llvmpath/"build" do
system "cmake", "-G", "Unix Makefiles", "..", *(std_cmake_args + args)
# Workaround for CMake Error: failed to create symbolic link
ENV.deparallelize if Hardware::CPU.arm?
system "cmake", "--build", "."
system "cmake", "--build", ".", "--target", "install"
system "cmake", "--build", ".", "--target", "install-xcode-toolchain" if MacOS::Xcode.installed?
end
on_macos do
# Install versioned symlink, or else `llvm-config` doesn't work properly
lib.install_symlink "libLLVM.dylib" => "libLLVM-#{version.major}.dylib" unless build.head?
end
# Install LLVM Python bindings
# Clang Python bindings are installed by CMake
(lib/site_packages).install llvmpath/"bindings/python/llvm"
# Install Emacs modes
elisp.install Dir[llvmpath/"utils/emacs/*.el"] + Dir[share/"clang/*.el"]
end
def caveats
<<~EOS
To use the bundled libc++ please add the following LDFLAGS:
LDFLAGS="-L#{opt_lib} -Wl,-rpath,#{opt_lib}"
EOS
end
test do
assert_equal prefix.to_s, shell_output("#{bin}/llvm-config --prefix").chomp
assert_equal "-lLLVM-#{version.major}", shell_output("#{bin}/llvm-config --libs").chomp
assert_equal (lib/shared_library("libLLVM-#{version.major}")).to_s,
shell_output("#{bin}/llvm-config --libfiles").chomp
(testpath/"omptest.c").write <<~EOS
#include <stdlib.h>
#include <stdio.h>
#include <omp.h>
int main() {
#pragma omp parallel num_threads(4)
{
printf("Hello from thread %d, nthreads %d\\n", omp_get_thread_num(), omp_get_num_threads());
}
return EXIT_SUCCESS;
}
EOS
clean_version = version.to_s[/(\d+\.?)+/]
system "#{bin}/clang", "-L#{lib}", "-fopenmp", "-nobuiltininc",
"-I#{lib}/clang/#{clean_version}/include",
"omptest.c", "-o", "omptest"
testresult = shell_output("./omptest")
sorted_testresult = testresult.split("\n").sort.join("\n")
expected_result = <<~EOS
Hello from thread 0, nthreads 4
Hello from thread 1, nthreads 4
Hello from thread 2, nthreads 4
Hello from thread 3, nthreads 4
EOS
assert_equal expected_result.strip, sorted_testresult.strip
(testpath/"test.c").write <<~EOS
#include <stdio.h>
int main()
{
printf("Hello World!\\n");
return 0;
}
EOS
(testpath/"test.cpp").write <<~EOS
#include <iostream>
int main()
{
std::cout << "Hello World!" << std::endl;
return 0;
}
EOS
# Testing default toolchain and SDK location.
system "#{bin}/clang++", "-v",
"-std=c++11", "test.cpp", "-o", "test++"
on_macos { assert_includes MachO::Tools.dylibs("test++"), "/usr/lib/libc++.1.dylib" }
assert_equal "Hello World!", shell_output("./test++").chomp
system "#{bin}/clang", "-v", "test.c", "-o", "test"
assert_equal "Hello World!", shell_output("./test").chomp
# Testing Command Line Tools
if MacOS::CLT.installed?
toolchain_path = "/Library/Developer/CommandLineTools"
system "#{bin}/clang++", "-v",
"-isysroot", MacOS::CLT.sdk_path,
"-isystem", "#{toolchain_path}/usr/include/c++/v1",
"-isystem", "#{toolchain_path}/usr/include",
"-isystem", "#{MacOS::CLT.sdk_path}/usr/include",
"-std=c++11", "test.cpp", "-o", "testCLT++"
assert_includes MachO::Tools.dylibs("testCLT++"), "/usr/lib/libc++.1.dylib"
assert_equal "Hello World!", shell_output("./testCLT++").chomp
system "#{bin}/clang", "-v", "test.c", "-o", "testCLT"
assert_equal "Hello World!", shell_output("./testCLT").chomp
end
# Testing Xcode
if MacOS::Xcode.installed?
system "#{bin}/clang++", "-v",
"-isysroot", MacOS::Xcode.sdk_path,
"-isystem", "#{MacOS::Xcode.toolchain_path}/usr/include/c++/v1",
"-isystem", "#{MacOS::Xcode.toolchain_path}/usr/include",
"-isystem", "#{MacOS::Xcode.sdk_path}/usr/include",
"-std=c++11", "test.cpp", "-o", "testXC++"
assert_includes MachO::Tools.dylibs("testXC++"), "/usr/lib/libc++.1.dylib"
assert_equal "Hello World!", shell_output("./testXC++").chomp
system "#{bin}/clang", "-v",
"-isysroot", MacOS.sdk_path,
"test.c", "-o", "testXC"
assert_equal "Hello World!", shell_output("./testXC").chomp
end
# link against installed libc++
# related to https://github.com/Homebrew/legacy-homebrew/issues/47149
system "#{bin}/clang++", "-v",
"-isystem", "#{opt_include}/c++/v1",
"-std=c++11", "-stdlib=libc++", "test.cpp", "-o", "testlibc++",
"-L#{opt_lib}", "-Wl,-rpath,#{opt_lib}"
on_macos { assert_includes MachO::Tools.dylibs("testlibc++"), "#{opt_lib}/libc++.1.dylib" }
assert_equal "Hello World!", shell_output("./testlibc++").chomp
# Testing mlir
(testpath/"test.mlir").write <<~EOS
func @bad_branch() {
br ^missing // expected-error {{reference to an undefined block}}
}
EOS
system "#{bin}/mlir-opt", "--verify-diagnostics", "test.mlir"
(testpath/"scanbuildtest.cpp").write <<~EOS
#include <iostream>
int main() {
int *i = new int;
*i = 1;
delete i;
std::cout << *i << std::endl;
return 0;
}
EOS
assert_includes shell_output("#{bin}/scan-build clang++ scanbuildtest.cpp 2>&1"),
"warning: Use of memory after it is freed"
(testpath/"clangformattest.c").write <<~EOS
int main() {
printf("Hello world!"); }
EOS
assert_equal "int main() { printf(\"Hello world!\"); }\n",
shell_output("#{bin}/clang-format -style=google clangformattest.c")
# Ensure LLVM did not regress output of `llvm-config --system-libs` which for a time
# was known to output incorrect linker flags; e.g., `-llibxml2.tbd` instead of `-lxml2`.
# On the other hand, note that a fully qualified path to `dylib` or `tbd` is OK, e.g.,
# `/usr/local/lib/libxml2.tbd` or `/usr/local/lib/libxml2.dylib`.
shell_output("#{bin}/llvm-config --system-libs").chomp.strip.split.each do |lib|
if lib.start_with?("-l")
assert !lib.end_with?(".tbd"), "expected abs path when lib reported as .tbd"
assert !lib.end_with?(".dylib"), "expected abs path when lib reported as .dylib"
else
p = Pathname.new(lib)
if p.extname == ".tbd" || p.extname == ".dylib"
assert p.absolute?, "expected abs path when lib reported as .tbd or .dylib"
end
end
end
end
end
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