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.

7 files changed, 33 insertions, 9 deletions

diff --git a/ChangeLog b/ChangeLog
index af9025c1080..4382f9dcabd 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 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.
diff --git a/Makefile.in b/Makefile.in
index 1a92ca8aaf3..2c854fd9ae0 100644
--- a/Makefile.in
+++ b/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}"; \
diff --git a/configure.ac b/configure.ac
index e73775e69a7..7d8cb8815fd 100644
--- a/configure.ac
+++ b/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.
diff --git a/lib-src/ChangeLog b/lib-src/ChangeLog
index 35672f22d64..44d7260dead 100644
--- a/lib-src/ChangeLog
+++ b/lib-src/ChangeLog
@@ -1,5 +1,8 @@
 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>
diff --git a/lib-src/Makefile.in b/lib-src/Makefile.in
index 3843f549679..b765668aebc 100644
--- a/lib-src/Makefile.in
+++ b/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 ; \
diff --git a/nt/ChangeLog b/nt/ChangeLog
index 12389607627..a1cac150cac 100644
--- a/nt/ChangeLog
+++ b/nt/ChangeLog
@@ -1,5 +1,8 @@
 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>
diff --git a/nt/Makefile.in b/nt/Makefile.in
index 8bd37e7983c..17fef43e26d 100644
--- a/nt/Makefile.in
+++ b/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 ; \