introducing 2 new AM_CONDITIONALS so that tf77 bindings are not built when the user does not want it or when the fortran 77 compiler is not found. Right now, the libraries were built but not snarfed into the big library. This was unneccessary

This commit was SVN r1029.

configure.ac

@@ -315,6 +315,30 @@ AC_DEFINE_UNQUOTED(LAM_ALIGNMENT_FORTRAN_DBLCOMPLEX,
     $LAM_ALIGNMENT_FORTRAN_DBLCOMPLEX,
     [Size of fortran double complex])
 
+#
+# There are 2 layers to the MPI f77 layer. The only extra thing
+# that determine f77 bindings is that fortran can be disabled by
+# user. In such cases, we need to not build the target at all.
+# One layer generates MPI_f77* bindings. The other layer
+# generates PMPI_f77* bindings. The following conditions
+# determine whether each (or both) these layers are
+# built.
+# Superceeding clause:
+#   - fortran77 bindings should be enabled, else everything is
+#     disabled
+# 1. MPI_f77* bindings are needed if:
+#   - Profiling is not required
+#   - Profiling is required but weak symbols are not
+#     supported
+# 2. PMPI_* bindings are needed if profiling is required.
+# Hence we define 2 AM_CONDITIONALs which tell us whether
+# each of these layers need to be built or NOT
+#
+AM_CONDITIONAL(WANT_MPI_F77_BINDINGS_LAYER,
+               test "$WANT_MPI_PROFILING" = 0 -o "$LAM_PROFILING_COMPILE_SEPARATELY" = 1  -a "$LAM_WANT_F77_BINDINGS" = 1)
+                    
+AM_CONDITIONAL(WANT_PMPI_F77_BINDINGS_LAYER,
+               test "$LAM_WANT_F77_BINDINGS" = 1 -a "$WANT_MPI_PROFILING" = 1)
 
 #
 # Fortran 90 setup

src/mpi/f77/Makefile.am

@@ -19,19 +19,25 @@ AM_CPPFLAGS     = -DLAM_PROFILE_LAYER=0
 # 1. When profiling is disabled.
 # 2. When profiling is enabled but weak symbol support is absent.
 #
-if WANT_MPI_BINDINGS_LAYER
+if WANT_MPI_F77_BINDINGS_LAYER
 mpi_lib = libmpi_f77_mpi.la
 else
 mpi_lib = 
 endif
 
-noinst_LTLIBRARIES = libmpi_f77.la $(mpi_lib)
+if LAM_WANT_F77_BINDINGS
+    install_libs = libmpi_f77.la $(mpi_lib)
+else
+    install_libs = 
+endif
+
+noinst_LTLIBRARIES = $(install_libs)
 
 #
 # The profile subdirectory always builds PMPI_* bindings. Hence, this
 # directory needs to be built whenever profiling is enabled
 #
-if WANT_PMPI_BINDINGS_LAYER
+if WANT_PMPI_F77_BINDINGS_LAYER
     pmpi_lib = profile/libmpi_f77_pmpi.la
 else
     pmpi_lib =