Ralf W. categorically told me that this kind of statement in

Makefile.am's is from a very old Automake bug which has long-since
been fixed.  Since we require very recent versions of AM, we don't
need these anymore.

This commit was SVN r11774.

ompi/mpi/c/Makefile.am

@@ -42,8 +42,6 @@ AM_CPPFLAGS     = -DOMPI_PROFILING_DEFINES=0
 noinst_LTLIBRARIES = libmpi_c.la
 if WANT_MPI_BINDINGS_LAYER
 noinst_LTLIBRARIES += libmpi_c_mpi.la
-else
-noinst_LTLIBRARIES +=
 endif
 
 headers = bindings.h

ompi/mpi/c/profile/Makefile.am

@@ -35,9 +35,6 @@ AM_CPPFLAGS = -DOMPI_PROFILING_DEFINES=1
 noinst_LTLIBRARIES =
 if WANT_PMPI_BINDINGS_LAYER
 noinst_LTLIBRARIES += libmpi_c_pmpi.la
-else
-noinst_LTLIBRARIES +=
-pmpi_lib = 
 endif
 
 headers = defines.h