opencoarrays 1.8.2 (new formula)

Closes #8790.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>

Formula/opencoarrays.rb

@@ -0,0 +1,50 @@
+class Opencoarrays < Formula
+  desc "open-source coarray Fortran ABI, API, and compiler wrapper"
+  homepage "http://opencoarrays.org"
+  url "https://github.com/sourceryinstitute/opencoarrays/releases/download/1.8.2/OpenCoarrays-1.8.2.tar.gz"
+  sha256 "dc5b98a62de85e38500f431b05290415d4a4a87001c0ba03fbe57403ad62010b"
+
+  head "https://github.com/sourceryinstitute/opencoarrays.git"
+
+  option "without-test", "Skip build time tests (not recommended)"
+
+  depends_on "gcc"
+  depends_on :fortran
+  depends_on :mpi => :cc
+  depends_on "cmake" => :build
+
+  def install
+    mkdir "build" do
+      system "cmake", "..", *std_cmake_args
+      system "make"
+      system "ctest", "--output-on-failure", "--schedule-random" if build.with? "test"
+      system "make", "install"
+    end
+  end
+
+  test do
+    ENV.fortran
+    (testpath/"tally.f90").write <<-EOS.undent
+      program main
+        use iso_c_binding, only : c_int
+        use iso_fortran_env, only : error_unit
+        implicit none
+        integer(c_int) :: tally
+        tally = this_image() ! this image's contribution
+        call co_sum(tally)
+        verify: block
+          integer(c_int) :: image
+          if (tally/=sum([(image,image=1,num_images())])) then
+             write(error_unit,'(a,i5)') "Incorrect tally on image ",this_image()
+             error stop 2
+          end if
+        end block verify
+        ! Wait for all images to pass the test
+        sync all
+        if (this_image()==1) write(*,*) "Test passed"
+      end program
+    EOS
+    system "#{bin}/caf", "tally.f90", "-o", "tally"
+    system "#{bin}/cafrun", "-np", "3", "./tally"
+  end
+end