r: build with openblas

Formula/r.rb

@@ -3,6 +3,7 @@ class R < Formula
   homepage "https://www.r-project.org/"
   url "https://cran.r-project.org/src/base/R-3/R-3.5.2.tar.gz"
   sha256 "e53d8c3cf20f2b8d7a9c1631b6f6a22874506fb392034758b3bb341c586c5b62"
+  revision 1
 
   bottle do
     sha256 "08120ed5b37e5cf4b067e03ba8cd90bd03c6c4af66d20ab96be3abe2658a4a63" => :mojave
@@ -15,11 +16,10 @@ class R < Formula
   depends_on "gettext"
   depends_on "jpeg"
   depends_on "libpng"
+  depends_on "openblas"
   depends_on "pcre"
   depends_on "readline"
   depends_on "xz"
-  depends_on :java => :optional
-  depends_on "openblas" => :optional
 
   # needed to preserve executable permissions on files without shebangs
   skip_clean "lib/R/bin"
@@ -46,22 +46,10 @@ class R < Formula
       "--with-lapack",
       "--enable-R-shlib",
       "SED=/usr/bin/sed", # don't remember Homebrew's sed shim
+      "--disable-java",
+      "--with-blas=-L#{Formula["openblas"].opt_lib} -lopenblas",
     ]
 
-    if build.with? "openblas"
-      args << "--with-blas=-L#{Formula["openblas"].opt_lib} -lopenblas"
-      ENV.append "LDFLAGS", "-L#{Formula["openblas"].opt_lib}"
-    else
-      args << "--with-blas=-framework Accelerate"
-      ENV.append_to_cflags "-D__ACCELERATE__" if ENV.compiler != :clang
-    end
-
-    if build.with? "java"
-      args << "--enable-java"
-    else
-      args << "--disable-java"
-    end
-
     # Help CRAN packages find gettext and readline
     ["gettext", "readline"].each do |f|
       ENV.append "CPPFLAGS", "-I#{Formula[f].opt_include}"