begin to move source files to folder for get a better overview

Makefile.am

 # Process this file with automake to produce Makefile.in
-SUBDIRS = libcdi src/lib/ncl src/lib/yac  src/lib/gradsdes src contrib test/data test
+SUBDIRS =                           \
+            libcdi                  \
+            src/lib/ncl             \
+            src/lib/yac             \
+            src/lib/gradsdes        \
+            src                     \
+            contrib                 \
+            test/data               \
+            test                    
 if MAINTAINER_MODE
 SUBDIRS += test/bandit_tests test/executeOnly
 endif

configure.ac

@@ -282,7 +282,14 @@ AC_CONFIG_FILES([test/executeOnly/Splitsel.test], [chmod a+x "$ac_file"])
 #Cdo Options
 AC_CONFIG_FILES([contrib/Makefile  cdo.spec cdo.settings])
 #Makefiles
-AC_CONFIG_FILES([Makefile src/lib/ncl/Makefile src/lib/yac/Makefile src/lib/gradsdes/Makefile src/Makefile])
+AC_CONFIG_FILES([
+                  Makefile
+                  src/lib/ncl/Makefile
+                  src/lib/yac/Makefile
+                  src/lib/gradsdes/Makefile
+                  src/Makefile
+                  src/grid/Makefile
+                  ])
 #Test Makefiles
 AC_CONFIG_FILES([test/Makefile test/data/Makefile test/executeOnly/Makefile test/bandit_tests/Makefile])
 AC_OUTPUT

src/Makefile.am

 ## Process this file with automake to produce Makefile.in
 noinst_LTLIBRARIES = libcdo.la
+
+SUBDIRS = grid
+
 libcdo_la_SOURCES =		after_dvtrans.cc          \
 				after_fctrans.cc          \
 				after_namelist.cc         \
@@ -107,18 +110,6 @@ libcdo_la_SOURCES =		after_dvtrans.cc          \
 				gaussian_latitudes.h      \
 				getMemorySize.c           \
 				getRSS.c                  \
-				grid_area.cc              \
-				grid_define.cc            \
-				grid_define.h             \
-				grid_from_name.cc         \
-				grid_gme.cc               \
-				grid_icosphere.cc         \
-				grid_point_search.cc      \
-				grid_point_search.h       \
-				grid_print.cc             \
-				grid_read.cc              \
-				grid_read_pingo.cc        \
-				grid_read_pingo.h         \
 				griddes.cc                \
 				griddes.h                 \
 				griddes_h5.cc             \
@@ -502,7 +493,11 @@ cdo_SOURCES +=			Maggraph.cc                     \
 				cdo_magics_mapper.cc
 #endif
 
-cdo_CPPFLAGS = -I$(top_srcdir)/libcdi/src -I$(top_srcdir)/src/mpim_grid
+# includes
+cdo_CPPFLAGS = 	-I$(top_srcdir)/libcdi/src			\
+				-I$(top_srcdir)/src/mpim_grid		\
+				-I$(top_srcdir)/src/grid
+
 cdo_CPPFLAGS += -DYAC_FOR_CDO
 cdo_LDADD    = libcdo.la $(top_builddir)/libcdi/src/libcdi.la
 cdo_LDADD   += $(top_builddir)/src/lib/yac/libyac.la

src/grid/Makefile.am

+
+
+libcdo_la_SOURCES = \
+                grid_area.cc              \
+				grid_define.cc            \
+				grid_define.h             \
+				grid_from_name.cc         \
+				grid_gme.cc               \
+				grid_icosphere.cc         \
+				grid_point_search.cc      \
+				grid_point_search.h       \
+				grid_print.cc             \
+				grid_read.cc              \
+				grid_read_pingo.cc        \
+				grid_read_pingo.h
+
+cdo_CPPFLAGS = -I$(top_srcdir)/src/grid
\ No newline at end of file