lapack: import from homebrew/dupes

Formula/lapack.rb

@@ -0,0 +1,57 @@
+class Lapack < Formula
+  desc "Linear Algebra PACKage"
+  homepage "http://www.netlib.org/lapack/"
+  url "http://www.netlib.org/lapack/lapack-3.7.0.tgz"
+  sha256 "ed967e4307e986474ab02eb810eed1d1adc73f5e1e3bc78fb009f6fe766db3be"
+  head "https://github.com/Reference-LAPACK/lapack.git"
+
+  keg_only :provided_by_osx
+
+  depends_on :fortran
+  depends_on "gcc"
+
+  # cmake 3.7 and later misdetect the Fortran compiler
+  # https://github.com/Reference-LAPACK/lapack/issues/139
+  # When the issue is fixes, replace with cmake dependency
+  resource "cmake" do
+    url "https://cmake.org/files/v3.6/cmake-3.6.3.tar.gz"
+    sha256 "7d73ee4fae572eb2d7cd3feb48971aea903bb30a20ea5ae8b4da826d8ccad5fe"
+  end
+
+  def install
+    # Build, install, and use cmake 3.6
+    resource("cmake").stage do
+      system "./bootstrap", "--prefix=#{buildpath}/cmake",
+                            "--no-system-libs",
+                            "--parallel=#{ENV.make_jobs}",
+                            "--system-zlib",
+                            "--system-bzip2"
+      system "make"
+      system "make", "install"
+    end
+    ENV.prepend_path "PATH", buildpath/"cmake/bin"
+
+    mkdir "build" do
+      system "cmake", "..",
+                      "-DBUILD_SHARED_LIBS:BOOL=ON",
+                      "-DLAPACKE:BOOL=ON",
+                      *std_cmake_args
+      system "make", "install"
+    end
+  end
+
+  test do
+    (testpath/"lp.cpp").write <<-EOS.undent
+      #include "lapacke.h"
+      int main() {
+        void *p = LAPACKE_malloc(sizeof(char)*100);
+        if (p) {
+          LAPACKE_free(p);
+        }
+        return 0;
+      }
+    EOS
+    system ENV.cc, "lp.cpp", "-I#{include}", "-L#{lib}", "-llapacke", "-Wl,-rpath,#{lib}", "-o", "lp"
+    system "./lp"
+  end
+end