class BerkeleyDbAT4 < Formula
  desc "High performance key/value database"
  homepage "https://www.oracle.com/technology/products/berkeley-db/index.html"
  url "http://download.oracle.com/berkeley-db/db-4.8.30.tar.gz"
  sha256 "e0491a07cdb21fb9aa82773bbbedaeb7639cbd0e7f96147ab46141e0045db72a"

  bottle do
    cellar :any
    sha256 "d1352d9ea6085984a1ecd512babf3158416fe5b56b98aee3cd209c98ffb1f520" => :sierra
    sha256 "ae348346b2c4bd39db740b0992cdad4f30d681a005cce8e20fbfa5d0059e4548" => :el_capitan
    sha256 "b220bd9ce6ad809639dbbdd31abdce4a136ccf3f11b5ca6d3cc8c1c9d0fe8dfe" => :yosemite
  end

  keg_only :versioned_formula

  # Fix build under Xcode 4.6
  patch :DATA

  def install
    # BerkeleyDB dislikes parallel builds
    ENV.deparallelize

    args = %W[
      --disable-debug
      --prefix=#{prefix}
      --mandir=#{man}
      --enable-cxx
    ]

    # BerkeleyDB requires you to build everything from the build_unix subdirectory
    cd "build_unix" do
      system "../dist/configure", *args
      system "make", "install"

      # use the standard docs location
      doc.parent.mkpath
      mv prefix+"docs", doc
    end
  end

  test do
    (testpath/"test.cpp").write <<-EOS.undent
      #include <assert.h>
      #include <string.h>
      #include <db_cxx.h>
      int main() {
        Db db(NULL, 0);
        assert(db.open(NULL, "test.db", NULL, DB_BTREE, DB_CREATE, 0) == 0);

        const char *project = "Homebrew";
        const char *stored_description = "The missing package manager for macOS";
        Dbt key(const_cast<char *>(project), strlen(project) + 1);
        Dbt stored_data(const_cast<char *>(stored_description), strlen(stored_description) + 1);
        assert(db.put(NULL, &key, &stored_data, DB_NOOVERWRITE) == 0);

        Dbt returned_data;
        assert(db.get(NULL, &key, &returned_data, 0) == 0);
        assert(strcmp(stored_description, (const char *)(returned_data.get_data())) == 0);

        assert(db.close(0) == 0);
      }
    EOS
    flags = %W[
      -I#{include}
      -L#{lib}
      -ldb_cxx
    ]
    system ENV.cxx, "test.cpp", "-o", "test", *flags
    system "./test"
    assert (testpath/"test.db").exist?
  end
end

__END__
diff --git a/dbinc/atomic.h b/dbinc/atomic.h
index 0034dcc..50b8b74 100644
--- a/dbinc/atomic.h
+++ b/dbinc/atomic.h
@@ -144,7 +144,7 @@ typedef LONG volatile *interlocked_val;
 #define	atomic_inc(env, p)	__atomic_inc(p)
 #define	atomic_dec(env, p)	__atomic_dec(p)
 #define	atomic_compare_exchange(env, p, o, n)	\
-	__atomic_compare_exchange((p), (o), (n))
+	__atomic_compare_exchange_db((p), (o), (n))
 static inline int __atomic_inc(db_atomic_t *p)
 {
	int	temp;
@@ -176,7 +176,7 @@ static inline int __atomic_dec(db_atomic_t *p)
  * http://gcc.gnu.org/onlinedocs/gcc-4.1.0/gcc/Atomic-Builtins.html
  * which configure could be changed to use.
  */
-static inline int __atomic_compare_exchange(
+static inline int __atomic_compare_exchange_db(
	db_atomic_t *p, atomic_value_t oldval, atomic_value_t newval)
 {
	atomic_value_t was;