put global thread pool into separate module

src/global_thread_pool.hpp

@@ -0,0 +1,30 @@
+// ====================================================================
+// This file is part of FlexibleSUSY.
+//
+// FlexibleSUSY is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published
+// by the Free Software Foundation, either version 3 of the License,
+// or (at your option) any later version.
+//
+// FlexibleSUSY is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with FlexibleSUSY.  If not, see
+// <http://www.gnu.org/licenses/>.
+// ====================================================================
+
+#include "thread_pool.hpp"
+#include "config.h"
+
+namespace flexiblesusy {
+
+#ifdef ENABLE_THREADS
+
+extern Thread_pool global_thread_pool;
+
+#endif
+
+} // namespace flexiblesusy

src/module.mk

@@ -16,6 +16,7 @@ LIBFLEXI_SRC := \
 		$(DIR)/dilogc.f \
 		$(DIR)/effective_couplings.cpp \
 		$(DIR)/error.cpp \
+		$(DIR)/global_thread_pool.cpp \
 		$(DIR)/gm2calc_interface.cpp \
 		$(DIR)/gsl_utils.cpp \
 		$(DIR)/gsl_vector.cpp \
@@ -45,7 +46,6 @@ LIBFLEXI_SRC := \
 		$(DIR)/standard_model_two_scale_convergence_tester.cpp \
 		$(DIR)/standard_model_two_scale_low_scale_constraint.cpp \
 		$(DIR)/standard_model_two_scale_model.cpp \
-		$(DIR)/thread_pool.cpp \
 		$(DIR)/threshold_loop_functions.cpp \
 		$(DIR)/utils.cpp \
 		$(DIR)/weinberg_angle.cpp \
@@ -76,6 +76,7 @@ LIBFLEXI_HDR := \
 		$(DIR)/ewsb_solver.hpp \
 		$(DIR)/fixed_point_iterator.hpp \
 		$(DIR)/functors.hpp \
+		$(DIR)/global_thread_pool.hpp \
 		$(DIR)/gm2calc_interface.hpp \
 		$(DIR)/gsl.hpp \
 		$(DIR)/gsl_utils.hpp \