support for DESTDIR

[Bruno Haible]

Hi,

The GNU standards mention a semi-standard way to support installation of
packages in relocated directories: Use of $(DESTDIR)$(prefix) instead of
$(prefix) during installation. Here is a patch that adds support for this
to libtool.

I don't think it is possible to make DESTDIR work with shared library
installation on AIX, but since DESTDIR is mostly used by people on
Linux and FreeBSD, this is not a big problem in practice.


2002-02-02  Bruno Haible  <address@hidden>

        * ltmain.sh: Add DESTDIR support on ELF systems.

*** libtool-1.4.3/ltmain.sh     2002-10-23 04:26:24.000000000 +0200
--- ltmain.sh   2003-02-18 21:53:41.000000000 +0100
***************
*** 1903,1909 ****
              add="-l$name"
            else
              # We cannot seem to hardcode it, guess we'll fake it.
!             add_dir="-L$libdir"
              add="-l$name"
            fi
  
--- 1907,1917 ----
              add="-l$name"
            else
              # We cannot seem to hardcode it, guess we'll fake it.
!             if test "X$installed" = Xyes; then
!               add_dir="-L$libdir"
!             else
!               add_dir="-L$DESTDIR$libdir"
!             fi
              add="-l$name"
            fi
  
***************
*** 4211,4222 ****
--- 4220,4240 ----
        esac
  
        # Add the libdir to current_libdirs if it is the destination.
+       DESTDIR=
        if test "X$destdir" = "X$libdir"; then
          case "$current_libdirs " in
          *" $libdir "*) ;;
          *) current_libdirs="$current_libdirs $libdir" ;;
          esac
        else
+         case "$destdir" in
+           *"$libdir")
+             DESTDIR=`$echo "$destdir" | sed -e 's!'"$libdir"'$!!'`
+             if test "X$destdir" != "X$DESTDIR$libdir"; then
+               DESTDIR=
+             fi
+             ;;
+         esac
          # Note the libdir as a future libdir.
          case "$future_libdirs " in
          *" $libdir "*) ;;
***************
*** 4230,4235 ****
--- 4248,4254 ----
  
        if test -n "$relink_command"; then
          $echo "$modename: warning: relinking \`$file'" 1>&2
+         export DESTDIR
          $show "$relink_command"
          if $run eval "$relink_command"; then :
          else
***************
*** 4237,4242 ****
--- 4256,4262 ----
            continue
          fi
        fi
+       unset DESTDIR
  
        # See the names of the shared library.
        set dummy $library_names