[email protected] (new formula)

Formula/boost-python3@1.87.rb

@@ -0,0 +1,107 @@
+class BoostPython3AT187 < Formula
+  desc "C++ library for C++/Python3 interoperability"
+  homepage "https://www.boost.org/"
+  url "https://github.com/boostorg/boost/releases/download/boost-1.87.0/boost-1.87.0-b2-nodocs.tar.xz"
+  sha256 "3abd7a51118a5dd74673b25e0a3f0a4ab1752d8d618f4b8cea84a603aeecc680"
+  license "BSL-1.0"
+  head "https://github.com/boostorg/boost.git", branch: "master"
+
+  livecheck do
+    formula "boost"
+  end
+
+  keg_only :versioned_formula
+
+  depends_on "numpy" => :build
+  depends_on "boost"
+  depends_on "[email protected]"
+
+  def python3
+    "python3.12"
+  end
+
+  def install
+    # "layout" should be synchronized with boost
+    args = %W[
+      -d2
+      -j#{ENV.make_jobs}
+      --layout=system
+      --user-config=user-config.jam
+      install
+      threading=multi
+      link=shared,static
+    ]
+
+    # Boost is using "clang++ -x c" to select C compiler which breaks C++14
+    # handling using ENV.cxx14. Using "cxxflags" and "linkflags" still works.
+    args << "cxxflags=-std=c++14"
+    args << "cxxflags=-stdlib=libc++" << "linkflags=-stdlib=libc++" if ENV.compiler == :clang
+
+    # Avoid linkage to boost container and graph modules
+    # Issue ref: https://github.com/boostorg/boost/issues/985
+    args << "linkflags=-Wl,-dead_strip_dylibs" if OS.mac?
+
+    # disable python detection in bootstrap.sh; it guesses the wrong include
+    # directory for Python 3 headers, so we configure python manually in
+    # user-config.jam below.
+    inreplace "bootstrap.sh", "using python", "#using python"
+
+    pyver = Language::Python.major_minor_version python3
+    py_prefix = if OS.mac?
+      Formula["python@#{pyver}"].opt_frameworks/"Python.framework/Versions"/pyver
+    else
+      Formula["python@#{pyver}"].opt_prefix
+    end
+
+    # Force boost to compile with the desired compiler
+    (buildpath/"user-config.jam").write <<~EOS
+      using #{OS.mac? ? "darwin" : "gcc"} : : #{ENV.cxx} ;
+      using python : #{pyver}
+                   : #{python3}
+                   : #{py_prefix}/include/python#{pyver}
+                   : #{py_prefix}/lib ;
+    EOS
+
+    system "./bootstrap.sh", "--prefix=#{prefix}",
+                             "--libdir=#{lib}",
+                             "--with-libraries=python",
+                             "--with-python=#{python3}",
+                             "--with-python-root=#{py_prefix}"
+
+    system "./b2", "--build-dir=build-python3",
+                   "--stagedir=stage-python3",
+                   "--libdir=install-python3/lib",
+                   "--prefix=install-python3",
+                   "python=#{pyver}",
+                   *args
+
+    lib.install buildpath.glob("install-python3/lib/*{python,numpy}*")
+    (lib/"cmake").install buildpath.glob("install-python3/lib/cmake/*{python,numpy}*")
+  end
+
+  test do
+    (testpath/"hello.cpp").write <<~CPP
+      #include <boost/python.hpp>
+      char const* greet() {
+        return "Hello, world!";
+      }
+      BOOST_PYTHON_MODULE(hello)
+      {
+        boost::python::def("greet", greet);
+      }
+    CPP
+
+    pyincludes = shell_output("#{python3}-config --includes").chomp.split
+    pylib = shell_output("#{python3}-config --ldflags --embed").chomp.split
+    pyver = Language::Python.major_minor_version(python3).to_s.delete(".")
+
+    system ENV.cxx, "-shared", "-fPIC", "-std=c++14", "hello.cpp", "-L#{lib}", "-lboost_python#{pyver}",
+                    "-o", "hello.so", *pyincludes, *pylib
+
+    output = <<~PYTHON
+      import hello
+      print(hello.greet())
+    PYTHON
+    assert_match "Hello, world!", pipe_output(python3, output, 0)
+  end
+end