Use ‘echo’ safely with ‘\’ or leading ‘-’

POSIX says that ‘echo FOO’ produces implementation-defined output
if FOO contains leading ‘-’, or ‘\’ anywhere, so don’t assume GNU
behavior in that case.
* Makefile.in (removenullpaths): Remove.
(epaths-force): Rewrite to avoid the need for ‘echo’.
(install-etc): Be clearer about escaping the shell metacharacters
‘\’ and ‘$’.
* Makefile.in (install-arch-indep, install-etcdoc):
* admin/charsets/mapconv, admin/merge-gnulib, admin/merge-pkg-config:
* admin/quick-install-emacs, build-aux/gitlog-to-emacslog:
* configure.ac, lib-src/rcs2log, make-dist:
* src/Makefile.in (lisp.mk):
Don’t assume ‘echo’ outputs ‘\’ and leading ‘-’ unscathed.
For example, use ‘printf '%s\n' "$foo"’ rather than ‘echo "$foo"’
if $foo can contain arbitrary characters.
* lisp/Makefile.in (TAGS): Use ‘ls’, not ‘echo’, to avoid ‘\’ issues.
* doc/lispref/two-volume.make (vol1.pdf):
* test/etags/make-src/Makefile (web ftp publish):
Use ‘printf’ rather than ‘echo -e’.

1 files changed, 4 insertions, 4 deletions

diff --git a/test/etags/make-src/Makefile b/test/etags/make-src/Makefile
index daf605d0016..016c633d791 100644
--- a/test/etags/make-src/Makefile
+++ b/test/etags/make-src/Makefile
@@ -15,7 +15,7 @@ ERLSRC=gs_dialog.erl lines.erl lists.erl
 FORTHSRC=test-forth.fth
 FSRC=entry.for entry.strange_suffix entry.strange
 HTMLSRC=softwarelibero.html index.shtml algrthms.html software.html
-JAVASRC=AWTEMul.java KeyEve.java SMan.java SysCol.java TG.java 
+JAVASRC=AWTEMul.java KeyEve.java SMan.java SysCol.java TG.java
 LUASRC=allegro.lua
 MAKESRC=Makefile
 OBJCSRC=Subprocess.h Subprocess.m PackInsp.h PackInsp.m
@@ -120,9 +120,9 @@ rsyncfromfly:
         rsync --exclude "*~" --exclude core --exclude etags -zauRv fly:gnu/etags/ ../..
 
 web ftp publish:
-        @-echo -e \\ttesting with debugging enabled...; $(MAKE) quiettest
-        @-echo -e \\ttesting standalone...; $(MAKE) standalone quiettest
-        @-echo -e \\ttesting fast versions...; $(MAKE) fastetags fastctags quiettest
+        @-printf '\ttesting with debugging enabled...\n'; $(MAKE) quiettest
+        @-printf '\ttesting standalone...\n'; $(MAKE) standalone quiettest
+        @-printf '\ttesting fast versions...\n'; $(MAKE) fastetags fastctags quiettest
         @$(MAKE) /home/www/pub/etags.c.gz
         @$(MAKE) /home/www/pub/software/unix/etags.tar.gz