Avoid redundant recompilations of Fortran source files providing interface modules.

src/Makefile.am

@@ -42,7 +42,7 @@ else
 	$(top_srcdir)/util/gen_public_header.pl N_HAVE_MPI $(header)
 endif
 
-$(sct_mod): sct.o
+$(sct_mod): sct.lo
 
 pkgconfigdir = $(libdir)/pkgconfig
 pkgconfig_DATA = pkgconfig/sct.pc

src_nosct/Makefile.am

@@ -18,7 +18,7 @@ libsct_la_SOURCES =
 nodist_include_HEADERS =
 endif
 
-$(sct_mod): nosct.o
+$(sct_mod): nosct.lo
 
 # Clean Fortran module files and Cray's postprocessed files.
 CLEANFILES = $(sct_mod) sct.i