always pass the precompiled lib-parts from common which the grid

implementation may use, added comments

[[Imported from SVN: r1085]]

grid/test/Makefile.am

 # $Id$
 
+#
+## estimate which tests can be built
+#
+
 if MPI
   YPROG = test-yaspgrid
   YRUN = run-yaspgrid
@@ -21,6 +25,10 @@ if UG
   UPROG = $(DO_UGTEST)
 endif
 
+#
+## define the lists of tests to build and run
+#
+
 # tests where program to build and program to run are equal
 NORMALTESTS = test-sgrid $(APROG) $(UPROG)
 
@@ -30,21 +38,28 @@ TESTS = $(NORMALTESTS) $(YRUN)
 # programs just to build when "make check" is used
 check_PROGRAMS = $(NORMALTESTS) $(YPROG)
 
-# define the programs
+#
+## common flags
+#
+
+# grids may use functions from common (e.g. standard streams)
+AM_LDFLAGS = $(top_builddir)/common/libcommon.la
+
+#
+## define the programs
+#
 
 test_sgrid_SOURCES = test-sgrid.cc
-test_sgrid_LDFLAGS = ../../common/libcommon.la
 
 test_yaspgrid_SOURCES = test-yaspgrid.cc
 test_yaspgrid_CXXFLAGS = $(AM_CPPFLAGS) $(MPI_CPPFLAGS)
-# !! last lib a bit weird...
-test_yaspgrid_LDFLAGS = $(MPI_LDFLAGS) $(MPI_LIBS) ../../common/libcommon.la
+test_yaspgrid_LDADD = $(MPI_LDFLAGS) $(MPI_LIBS)
 
 # this implicitly checks the autoconf-test as well...
 test_albert_SOURCES = test-albert.cc
 test_albert_CPPFLAGS = $(AM_CPPFLAGS) $(ALBERT_CPPFLAGS)
-test_albert_LDFLAGS = $(ALBERT_LDFLAGS) $(ALBERT_LIBS)
+test_albert_LDADD = $(ALBERT_LDFLAGS) $(ALBERT_LIBS)
 
 test_ug_SOURCES = test-ug.cc
 test_ug_CPPFLAGS = $(AM_CPPFLAGS) $(UG_CPPFLAGS) $(AMIRAMESH_CPPFLAGS)
-test_ug_LDFLAGS = $(UG_LDFLAGS) $(UG_LIBS) $(AMIRAMESH_LDFLAGS) $(AMIRAMESH_LIBS)
+test_ug_LDADD = $(UG_LDFLAGS) $(UG_LIBS) $(AMIRAMESH_LDFLAGS) $(AMIRAMESH_LIBS)