Avoid non-portable "` ... \"...\" ... `" nesting

* configure.ac:
* Makefile.in (install-arch-indep, install-etcdoc, install-info):
* lib-src/Makefile.in ($(DESTDIR)${archlibdir}):
* nt/Makefile.in ($(DESTDIR)${archlibdir}):
Avoid non-portable "`\" nesting.

ChangeLog

 2013-10-24  Glenn Morris  <rgm@gnu.org>
 
+	* configure.ac:
+	* Makefile.in (install-arch-indep, install-etcdoc, install-info):
+	Avoid non-portable "`\" nesting.
+
 	* configure.ac (CPPFLAGS) [mingw32]: Use abs_top_srcdir.
 
 	* Makefile.in (abs_top_srcdir): New, set by configure.

Makefile.in

@@ -571,9 +571,11 @@ install-arch-indep: lisp leim install-info install-man ${INSTALL_ARCH_INDEP_EXTR
 	for dir in ${COPYDIR} ; do \
 	  [ -d $${dir} ] || exit 1 ; \
 	  dest="$$1" ; shift ; \
-	  [ -d "$${dest}" ] && \
-	    [ "`cd \"$${dest}\" && /bin/pwd`" = "`cd $${dir} && /bin/pwd`" ] && \
-	    continue ; \
+	  if [ -d "$${dest}" ]; then \
+	    exp_dest=`cd "$${dest}" && /bin/pwd`; \
+	    [ "$$exp_dest" = "`cd $${dir} && /bin/pwd`" ] && continue ; \
+	  else true; \
+	  fi; \
 	  if [ "$${dir}" = "leim/quail" ]; then \
 	    [ "`cd $${dir} && /bin/pwd`" = "`cd ${srcdir}/leim/quail && /bin/pwd`" ] && \
 	      continue ; \
@@ -623,7 +625,8 @@ install-arch-indep: lisp leim install-info install-man ${INSTALL_ARCH_INDEP_EXTR
 	      cd "$${thisdir}" ; \
 	      cd "$${dir}" || exit 1 ; \
 	      for f in `find . -name "*.elc" -print`; do \
-	        ${GZIP_PROG} -9n "`echo \"$$f\" | sed 's/.elc$$/.el/'`" ; \
+	        f_el=`echo "$$f" | sed 's/.elc$$/.el/'`; \
+	        ${GZIP_PROG} -9n "$$f_el" ; \
 	      done ; \
 	    done )
 	-chmod -R a+r "$(DESTDIR)${datadir}/emacs/${version}" ${COPYDESTS}
@@ -637,7 +640,8 @@ install-arch-indep: lisp leim install-info install-man ${INSTALL_ARCH_INDEP_EXTR
 install-etcdoc: src install-arch-indep
 	-unset CDPATH; \
 	umask 022; ${MKDIR_P} "$(DESTDIR)${etcdocdir}" ; \
-	if [ "`cd ./etc; /bin/pwd`" != "`cd \"$(DESTDIR)${etcdocdir}\"; /bin/pwd`" ]; \
+	exp_etcdocdir=`cd "$(DESTDIR)${etcdocdir}"; /bin/pwd`; \
+	if [ "`cd ./etc; /bin/pwd`" != "$$exp_etcdocdir" ]; \
 	then \
 	   docfile="DOC"; \
 	   echo "Copying etc/$${docfile} to $(DESTDIR)${etcdocdir} ..." ; \
@@ -650,7 +654,8 @@ install-info: info
 	umask 022; ${MKDIR_P} "$(DESTDIR)${infodir}"
 	-unset CDPATH; \
 	thisdir=`/bin/pwd`; \
-	if [ "`cd ${srcdir}/info && /bin/pwd`" = "`cd \"$(DESTDIR)${infodir}\" && /bin/pwd`" ]; then \
+	exp_infodir=`cd "$(DESTDIR)${infodir}" && /bin/pwd`; \
+	if [ "`cd ${srcdir}/info && /bin/pwd`" = "$$exp_infodir" ]; then \
 	  true; \
 	else \
 	  (cd "$(DESTDIR)${infodir}"; \

configure.ac

@@ -78,7 +78,14 @@ dnl I think we have to check, eg, both exec_prefix and bindir,
 dnl because the latter by default is not yet expanded, but the user
 dnl may have specified a value for it via --bindir.
 dnl Note that abs_srcdir and abs_builddir are not yet defined. :(
-for var in "`pwd`" "`cd \"$srcdir\"; pwd`" "$prefix" "$exec_prefix" \
+
+dnl "`cd \"$srcdir\" is not portable.
+dnl See autoconf manual "Shell Substitutions":
+dnl "There is just no portable way to use double-quoted strings inside
+dnl double-quoted back-quoted expressions (pfew!)."
+temp_srcdir=`cd "$srcdir"; pwd`
+
+for var in "`pwd`" "$temp_srcdir" "$prefix" "$exec_prefix" \
     "$datarootdir" "$bindir" "$datadir" "$sharedstatedir" "$libexecdir"; do
 
   dnl configure sets LC_ALL=C early on, so this range should work.

lib-src/ChangeLog

 2013-10-24  Glenn Morris  <rgm@gnu.org>
 
+	* Makefile.in ($(DESTDIR)${archlibdir}):
+	Avoid non-portable "`\" nesting.
+
 	* Makefile.in (abs_top_srcdir): New, set by configure.
 
 2013-10-23  Glenn Morris  <rgm@gnu.org>

lib-src/Makefile.in

@@ -234,7 +234,8 @@ $(DESTDIR)${archlibdir}: all
 	@echo
 	@echo "Installing utilities run internally by Emacs."
 	umask 022; ${MKDIR_P} "$(DESTDIR)${archlibdir}"
-	if [ "`cd \"$(DESTDIR)${archlibdir}\" && /bin/pwd`" != "`/bin/pwd`" ]; then \
+	exp_archlibdir=`cd "$(DESTDIR)${archlibdir}" && /bin/pwd`; \
+	if [ "$$exp_archlibdir" != "`/bin/pwd`" ]; then \
 	  for file in ${UTILITIES}; do \
 	    $(INSTALL_PROGRAM) $(INSTALL_STRIP) $$file "$(DESTDIR)${archlibdir}/$$file" ; \
 	  done ; \

nt/ChangeLog

 2013-10-24  Glenn Morris  <rgm@gnu.org>
 
+	* Makefile.in ($(DESTDIR)${archlibdir}):
+	Avoid non-portable "`\" nesting.
+
 	* Makefile.in (abs_top_srcdir): New, set by configure.
 
 2013-10-23  Glenn Morris  <rgm@gnu.org>

nt/Makefile.in

@@ -144,7 +144,8 @@ $(DESTDIR)${archlibdir}: all
 	@echo
 	@echo "Installing utilities run internally by Emacs."
 	umask 022; ${MKDIR_P} "$(DESTDIR)${archlibdir}"
-	if [ "`cd \"$(DESTDIR)${archlibdir}\" && /bin/pwd`" != "`/bin/pwd`" ]; then \
+	exp_archlibdir=`cd "$(DESTDIR)${archlibdir}" && /bin/pwd`; \
+	if [ "$$exp_archlibdir" != "`/bin/pwd`" ]; then \
 	  for file in ${UTILITIES}; do \
 	    $(INSTALL_PROGRAM) $(INSTALL_STRIP) $$file "$(DESTDIR)${archlibdir}/$$file" ; \
 	  done ; \