--- rpl/src/Makefile.am	2019/11/01 16:24:53	1.117
+++ rpl/src/Makefile.am	2023/08/07 13:30:50	1.119
@@ -460,7 +460,7 @@ rpl_LDFLAGS = -g @PROFILAGE@ @EXPORT_DYN
 			  -Wl,--exclude-libs,libssl.a:libcrypto.a:libsqlite3.a:liblapack.a:libblas.a:librplcas.a:libncurses.a:libz.a:libgsl.a:libreadline.a:libhistory.a:libsigsegv.a
 rpl_CFLAGS = $(AM_CFLAGS) @C_STANDARD@ -Wall -Wextra -Wno-unused-function \
 		 -Wno-pointer-sign -Wno-unused-parameter @NESTED_FUNCTIONS@ \
-		 -Wconversion
+		 -Wconversion -ftabstop=4
 rpl_CXXFLAGS = $(AM_CFLAGS) -Wall -Wextra
 rpl_FFLAGS = $(AM_FFLAGS) -fno-f2c
 rpl_FCFLAGS = $(AM_FCFLAGS) -fno-second-underscore -fno-f2c
@@ -545,7 +545,7 @@ librpl:
 			$(ldadd_libcrypto) $(ldadd_libssl) $(ldadd_libsqlite) \
 			$(ldadd_librplcas) $(ldadd_libsigsegv) $(ldadd_libmotif); \
 	do \
-		cp -f $$i $(top_builddir)/librpl; \
+		if [ -e $$i ]; then cp -f $$i $(top_builddir)/librpl; fi; \
 	done
 	@(cd $(top_builddir)/librpl && n=0 && \
 			echo "    Building standalone librpl.a"; \