Add ert-detecting macro for building with ert support.

This is primarily intended for enabling eclipse-format output from simulators.
Also add missing header to Makefile.am, to fix 'make distcheck'.

Makefile.am

@@ -7,28 +7,29 @@ SUBDIRS = . examples
 lib_LTLIBRARIES = libopmpolymer.la
 
 libopmpolymer_la_SOURCES =				\
-opm/polymer/IncompTpfaPolymer.cpp			\
 opm/polymer/CompressibleTpfaPolymer.cpp			\
-opm/polymer/SimulatorPolymer.cpp			\
-opm/polymer/SimulatorCompressiblePolymer.cpp	        \
-opm/polymer/TransportModelPolymer.cpp			\
-opm/polymer/TransportModelCompressiblePolymer.cpp       \
+opm/polymer/IncompTpfaPolymer.cpp			\
 opm/polymer/PolymerInflow.cpp				\
 opm/polymer/PolymerProperties.cpp			\
+opm/polymer/SimulatorCompressiblePolymer.cpp		\
+opm/polymer/SimulatorPolymer.cpp			\
+opm/polymer/TransportModelCompressiblePolymer.cpp	\
+opm/polymer/TransportModelPolymer.cpp			\
 opm/polymer/polymerUtilities.cpp
 
 nobase_include_HEADERS =				\
+opm/polymer/CompressibleTpfaPolymer.hpp			\
 opm/polymer/GravityColumnSolverPolymer.hpp		\
 opm/polymer/GravityColumnSolverPolymer_impl.hpp		\
 opm/polymer/IncompPropertiesDefaultPolymer.hpp		\
 opm/polymer/IncompTpfaPolymer.hpp			\
-opm/polymer/CompressibleTpfaPolymer.hpp			\
+opm/polymer/PolymerBlackoilState.hpp			\
 opm/polymer/PolymerInflow.hpp				\
 opm/polymer/PolymerProperties.hpp			\
 opm/polymer/PolymerState.hpp				\
-opm/polymer/SinglePointUpwindTwoPhasePolymer.hpp	\
-opm/polymer/SimulatorPolymer.hpp			\
 opm/polymer/SimulatorCompressiblePolymer.hpp		\
+opm/polymer/SimulatorPolymer.hpp			\
+opm/polymer/SinglePointUpwindTwoPhasePolymer.hpp	\
+opm/polymer/TransportModelCompressiblePolymer.hpp	\
 opm/polymer/TransportModelPolymer.hpp			\
-opm/polymer/TransportModelCompressiblePolymer.hpp       \
 opm/polymer/polymerUtilities.hpp

configure.ac

@@ -39,6 +39,8 @@ AX_BOOST_DATE_TIME
 AX_BOOST_FILESYSTEM
 AX_BOOST_UNIT_TEST_FRAMEWORK
 
+ERT
+
 # Checks for header files.
 AC_CHECK_HEADERS([opm/core/grid.h], [],
 [AC_MSG_ERROR(

m4/ert.m4

@@ -0,0 +1,67 @@
+AC_DEFUN([_ERT_SOURCE_TEXT],
+[
+AC_LANG_PROGRAM(
+[[
+#include <stddef.h>
+#include <ecl_util.h>
+]],dnl
+[[
+int sz;
+sz = ecl_util_get_sizeof_ctype(ECL_INT_TYPE);
+]])[]dnl
+])[]dnl
+
+# ----------------------------------------------------------------------
+
+AC_DEFUN([ERT],
+[
+AC_ARG_WITH([ert],
+            [AS_HELP_STRING([--with-ert=<root>], [Use ERT libraries])],
+            [], [with_ert=no])
+
+use_ert=no
+
+AS_IF([test x"${with_ert}" != x"no"],
+[
+  _ert_LDFLAGS_SAVE="${LDFLAGS}"
+  _ert_LIBS_SAVE="${LIBS}"
+  _ert_CPPFLAGS_SAVE="${CPPFLAGS}"
+  _ert_CFLAGS_SAVE="${CFLAGS}"
+
+  ERT_CPPFLAGS=
+  ERT_LDFLAGS=
+  ERT_LIBS="-lecl -lgeometry -lert_util -lpthread -lz -lgomp"
+  AS_IF([test x"${with_ert}" != x"yes"],
+    [ERT_LDFLAGS="-L${with_ert}/lib"
+     ERT_CPPFLAGS="-I${with_ert}/include"], [:])[]dnl
+
+  CFLAGS="-std=gnu99"
+  CPPFLAGS="${ERT_CPPFLAGS} ${CPPFLAGS}"
+  LDFLAGS="${ERT_LDFLAGS} ${LDFLAGS}"
+  LIBS="${ERT_LIBS} ${LIBS}"
+
+  AC_LINK_IFELSE([_ERT_SOURCE_TEXT],
+    [use_ert=yes], [use_ert=no])
+
+  LIBS="${_ert_LIBS_SAVE}"
+  CPPFLAGS="${_ert_CPPFLAGS_SAVE}"
+  LDFLAGS="${_ert_LDFLAGS_SAVE}"
+  CFLAGS="${_ert_CFLAGS_SAVE}"
+
+  AS_IF([test x"${use_ert}" = x"yes"],
+   [AC_SUBST([ERT_CPPFLAGS])
+    AC_SUBST([ERT_LDFLAGS])
+    AC_SUBST([ERT_LIBS])
+    AC_DEFINE([HAVE_ERT], [1],
+              [Are the ERT libraries available for reading and writing ECLIPSE files.])],dnl
+   [:])[]dnl
+], [:])[]dnl
+
+AM_CONDITIONAL([HAVE_ERT], [test x"${use_ert}" != x"no"])
+
+# AC_MSG_ERROR(
+# [**** ERT_CPPFLAGS = ${ERT_CPPFLAGS} ****
+# **** ERT_LDFLAGS = ${ERT_LDFLAGS} ****
+# **** ERT_LIBS = ${ERT_LIBS} ****
+# ])
+])