cgns 3.4.0 (new formula)

cgns was once part of homebrew (homebrew-science?) in the past

Closes #48536.

Signed-off-by: Izaak Beekman <zbeekman@gmail.com>

Formula/cgns.rb

@@ -0,0 +1,42 @@
+class Cgns < Formula
+  desc "CFD General Notation System"
+  homepage "http://cgns.org/"
+  url "https://github.com/CGNS/CGNS/archive/v3.4.0.tar.gz"
+  sha256 "6372196caf25b27d38cf6f056258cb0bdd45757f49d9c59372b6dbbddb1e05da"
+
+  depends_on "cmake" => :build
+  depends_on "gcc"
+  depends_on "hdf5"
+  depends_on "szip"
+  uses_from_macos "zlib"
+
+  def install
+    args = std_cmake_args
+    args << "-DCGNS_ENABLE_64BIT=YES" if Hardware::CPU.is_64_bit?
+    args << "-DCGNS_ENABLE_FORTRAN=YES"
+    args << "-DCGNS_ENABLE_HDF5=YES"
+
+    mkdir "build" do
+      system "cmake", "..", *args
+      system "make"
+      system "make", "install"
+    end
+  end
+
+  test do
+    (testpath/"test.c").write <<~EOS
+      #include <stdio.h>
+      #include "cgnslib.h"
+      int main(int argc, char *argv[])
+      {
+        int filetype = CG_FILE_NONE;
+        if (cg_is_cgns(argv[0], &filetype) != CG_ERROR)
+          return 1;
+        printf(\"%d.%d.%d\\n\",CGNS_VERSION/1000,(CGNS_VERSION/100)%10,(CGNS_VERSION/10)%10);
+        return 0;
+      }
+    EOS
+    system Formula["hdf5"].opt_prefix/"bin/h5cc", testpath/"test.c", "-L#{opt_lib}", "-lcgns"
+    assert_match(/#{version}/, shell_output("./a.out"))
+  end
+end