rename; pin other dependencies

tools/cibuildwheel-mac.sh

@@ -4,6 +4,6 @@ set -xe
 
 cd $GITHUB_WORKSPACE
 
-brew install gsl --quiet
-brew install --formula ./tools/mac-brew-nlopt-271.rb --quiet
-brew install eigen --quiet
+brew install --formula ./tools/mac/gsl.rb --quiet
+brew install --formula ./tools/mac/nlopt.rb --quiet
+brew install --formula ./tools/mac/eigen.rb --quiet

tools/mac/eigen.rb

@@ -0,0 +1,53 @@
+# Vendor version 3.4.0; do not rename file.
+# https://github.com/Homebrew/homebrew-core/blob/7061c51a7ac2945fc7602ab6df0e7ff31b1fb49c/Formula/e/eigen.rb
+class Eigen < Formula
+    desc "C++ template library for linear algebra"
+    homepage "https://eigen.tuxfamily.org/"
+    url "https://gitlab.com/libeigen/eigen/-/archive/3.4.0/eigen-3.4.0.tar.gz"
+    sha256 "8586084f71f9bde545ee7fa6d00288b264a2b7ac3607b974e54d13e7162c1c72"
+    license "MPL-2.0"
+    revision 1
+    head "https://gitlab.com/libeigen/eigen.git", branch: "master"
+
+    livecheck do
+      url :stable
+      regex(/^v?(\d+(?:\.\d+)+)$/i)
+    end
+
+    bottle do
+      sha256 cellar: :any_skip_relocation, all: "211fd7f1d58b383e3d64335c08a376a7d8433007ce61410ead0320df34b6f4bd"
+    end
+
+    depends_on "cmake" => :build
+
+    conflicts_with "freeling", because: "freeling ships its own copy of eigen"
+
+    def install
+      mkdir "eigen-build" do
+        args = std_cmake_args
+        args << "-Dpkg_config_libdir=#{lib}" << ".."
+        system "cmake", *args
+        system "make", "install"
+      end
+      (share/"cmake/Modules").install "cmake/FindEigen3.cmake"
+    end
+
+    test do
+      (testpath/"test.cpp").write <<~EOS
+        #include <iostream>
+        #include <Eigen/Dense>
+        using Eigen::MatrixXd;
+        int main()
+        {
+          MatrixXd m(2,2);
+          m(0,0) = 3;
+          m(1,0) = 2.5;
+          m(0,1) = -1;
+          m(1,1) = m(1,0) + m(0,1);
+          std::cout << m << std::endl;
+        }
+      EOS
+      system ENV.cxx, "test.cpp", "-I#{include}/eigen3", "-o", "test"
+      assert_equal %w[3 -1 2.5 1.5], shell_output("./test").split
+    end
+  end

tools/mac/gsl.rb

@@ -0,0 +1,40 @@
+# Vendor version 2.7.1; do not rename file.
+# https://github.com/Homebrew/homebrew-core/blob/7061c51a7ac2945fc7602ab6df0e7ff31b1fb49c/Formula/g/gsl.rb
+class Gsl < Formula
+    desc "Numerical library for C and C++"
+    homepage "https://www.gnu.org/software/gsl/"
+    url "https://ftp.gnu.org/gnu/gsl/gsl-2.7.1.tar.gz"
+    mirror "https://ftpmirror.gnu.org/gsl/gsl-2.7.1.tar.gz"
+    sha256 "dcb0fbd43048832b757ff9942691a8dd70026d5da0ff85601e52687f6deeb34b"
+    license "GPL-3.0-or-later"
+
+    bottle do
+      sha256 cellar: :any,                 arm64_sonoma:   "67f4f4745081dd2d7a6d8434d59a240d2fc13b954d1015c82deb1445dcecdbfb"
+      sha256 cellar: :any,                 arm64_ventura:  "2430e5586457f35f98014639a19d40c4d8d4b821949bb0cc7e091ac2aa9987bb"
+      sha256 cellar: :any,                 arm64_monterey: "207ba177628696ce2179fe94125ecd637794396a442a7550c92f9a8a202c03bf"
+      sha256 cellar: :any,                 arm64_big_sur:  "1184a75460c96dc80a9fa5299f3f0931bbff729b556607e2b7492608dd7e44d7"
+      sha256 cellar: :any,                 sonoma:         "5e7546917872e35511baa70ee1602db896c92e7801e241d891d1860ffa2ed950"
+      sha256 cellar: :any,                 ventura:        "9e28ec4b8e62b94c208312780b63f417b08c3ca80dcb7e7f7223e06675e2807c"
+      sha256 cellar: :any,                 monterey:       "3125ff756739ec6eea0ddac3c3b01e879f525eb3b7de88586d6438cd954e28a8"
+      sha256 cellar: :any,                 big_sur:        "3cfd6c05d383ad930471e6d92942de62982d5e4149d5508bbbf5ed513561c288"
+      sha256 cellar: :any,                 catalina:       "03a4c21c0384602ec0d5c802f61fdc0737730a703396b3fe37274c884019a6b8"
+      sha256 cellar: :any_skip_relocation, x86_64_linux:   "daf456a559c5f031b5584db251ffe07aa02fbb04c3d7dc06e1202cfd9109a0c7"
+    end
+
+    # Fix -flat_namespace being used on Big Sur and later.
+    patch do
+      url "https://raw.githubusercontent.com/Homebrew/formula-patches/03cf8088210822aa2c1ab544ed58ea04c897d9c4/libtool/configure-big_sur.diff"
+      sha256 "35acd6aebc19843f1a2b3a63e880baceb0f5278ab1ace661e57a502d9d78c93c"
+    end
+
+    def install
+      ENV.deparallelize
+      system "./configure", "--disable-dependency-tracking", "--prefix=#{prefix}"
+      system "make" # A GNU tool which doesn't support just make install! Shameful!
+      system "make", "install"
+    end
+
+    test do
+      system bin/"gsl-randist", "0", "20", "cauchy", "30"
+    end
+  end

tools/nlopt.rb → tools/mac/nlopt.rb

@@ -1,6 +1,5 @@
-# Vendor version 2.7.1 of nlopt; do not rename file.
+# Vendor version 2.7.1; do not rename file.
 # https://github.com/Homebrew/homebrew-core/blob/7061c51a7ac2945fc7602ab6df0e7ff31b1fb49c/Formula/n/nlopt.rb
-# https://stackoverflow.com/questions/3987683/homebrew-install-specific-version-of-formula/9832084#9832084
 class Nlopt < Formula
     desc "Free/open-source library for nonlinear optimization"
     homepage "https://nlopt.readthedocs.io/"