[ng] tex, tags, install: make sure recipes don't end with '\' (backslash char)

Some shells are unable to handle that.  Issue revealed by failures of the
"check-no-trailing-backslash-in-recipes" rule.

* lib/am/texinfos.mk, lib/am/tags.mk, lib/am/scripts.am: Adjust.

Signed-off-by: Stefano Lattarini <stefano.lattarini@gmail.com>

4 files changed, 14 insertions, 7 deletions

diff --git a/lib/am/lisp.am b/lib/am/lisp.am
index 2c1a4466b..eb7a011cc 100644
--- a/lib/am/lisp.am
+++ b/lib/am/lisp.am
@@ -93,7 +93,7 @@ uninstall-%DIR%LISP:
 	   $(foreach i,\
 ?BASE?	     $(notdir $(%DIR%_LISP)), \
 ?!BASE?	     $(patsubst $(srcdir)/%,%,$(%DIR%_LISP)), \
-## Also remove the '.elc' byte-compiled versions (if any).
+## Also remove the '.elc' byte-compiled versions, if any.
 	     $(i) $(i)c))
 endif %?INSTALL%
 
diff --git a/lib/am/scripts.am b/lib/am/scripts.am
index 5211ab55e..7f1169d85 100644
--- a/lib/am/scripts.am
+++ b/lib/am/scripts.am
@@ -28,7 +28,10 @@ install-%DIR%SCRIPTS: $(%DIR%_SCRIPTS)
 	@test -n '$(and $(%DIR%_SCRIPTS),$(%NDIR%dir))' || exit 0; \
 	echo " $(MKDIR_P) '$(DESTDIR)$(%NDIR%dir)'"; \
 	$(MKDIR_P) "$(DESTDIR)$(%NDIR%dir)" || exit 1; \
-	$(foreach i,$(%DIR%_SCRIPTS), \
+## Ending a recipe with a backslash cause some shells to choke,
+## so add a dummy ':' command to make sure the rest of the command
+## is not empty.
+	:; $(foreach i,$(%DIR%_SCRIPTS), \
 	  p=$(call am.vpath.rewrite,$i); \
 ## If the _SCRIPTS variable has an entry like foo/bar, install it as
 ## $(destdir)/bar, not $(destdir)/foo/bar.  The user can make a new dir
diff --git a/lib/am/tags.mk b/lib/am/tags.mk
index 46205fd23..81adf876c 100644
--- a/lib/am/tags.mk
+++ b/lib/am/tags.mk
@@ -89,14 +89,18 @@ ifneq ($(or $(ETAGS_ARGS),$(am.tags.subfiles),$(am.tags.files.unique)),)
 	$(ETAGS) \
 	  $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
 	  $(foreach f,$(am.tags.subfiles),'$(am.tags.include-option)=$(CURDIR)/$f') \
-	  $(am.tags.files.unique)
+## Some shells choke when a recipe ends with a backslash.  So make sure the
+## next line is not an empty string.
+	  $(or $(am.tags.files.unique),;)
 endif
 
 ctags-am: $(TAGS_DEPENDENCIES) $(am.tags.files)
 ifneq ($(or $(CTAGS_ARGS),$(am.tags.files.unique)),)
 	$(CTAGS) \
 	  $(CTAGSFLAGS) $(AM_CTAGSFLAGS) $(CTAGS_ARGS) \
-	  $(am.tags.files.unique)
+## Some shells choke when a recipe ends with a backslash.  So make sure the
+## next line is not an empty string.
+	  $(or $(am.tags.files.unique),;)
 endif
 
 am.clean.dist.f += TAGS tags
diff --git a/lib/am/texinfos.mk b/lib/am/texinfos.mk
index ee925e8ef..90f1eabc5 100644
--- a/lib/am/texinfos.mk
+++ b/lib/am/texinfos.mk
@@ -169,14 +169,14 @@ install-html-am: .am/install-html
 	rellist='$(notdir $(and $(infodir),$^))'; \
 	test -n "$$rellist" || exit 0; \
 	for relfile in $$rellist; do \
-	  echo " install-info --info-dir='$(DESTDIR)$(infodir)' '$(DESTDIR)$(infodir)/$$relfile'";\
+	  echo " install-info --info-dir='$(DESTDIR)$(infodir)' '$(DESTDIR)$(infodir)/$$relfile'"; \
 ## Run ":" after install-info in case install-info fails.  We really
 ## don't care about failures here, because they can be spurious.  For
 ## instance if you don't have a dir file, install-info will fail.  I
 ## think instead it should create a new dir file for you.  This bug
 ## causes the "make distcheck" target to fail reliably.
-	  install-info --info-dir="$(DESTDIR)$(infodir)" "$(DESTDIR)$(infodir)/$$relfile" || :;\
-	done; \
+	  install-info --info-dir="$(DESTDIR)$(infodir)" "$(DESTDIR)$(infodir)/$$relfile" || :; \
+	done
 
 .am/install-dvi: $(DVIS)
 	@$(NORMAL_INSTALL)