stdrelpaths

Here is the standard hierarchy of paths, as defined by the GNU Coding Standards:

    prefix
      exec_prefix
         bindir
         libdir
         libexecdir
         sbindir
      datadir
      sysconfdir
      sharestatedir
      localstatedir
      infodir
      lispdir
      includedir
      oldincludedir
      mandir

This macro will setup a set of variables of the form 'xxx_forward_relative_path' and 'xxx_backward_relative_path' where xxx is one of the above directories. The latter variable is set to the relative path to go from xxx to its parent directory, while the former hold the other way.

For instance `bindir_relative_path' will contains the value to add to $exec_prefix to reach the $bindir directory (usually 'bin'), and `bindir_backward_relative_path' the value to append to $bindir to reach the $exec_prefix directory (usually '..').

This macro requires adl_COMPUTE_RELATIVE_PATHS which itself requires adl_NORMALIZE_PATH.

AC_DEFUN([adl_COMPUTE_STANDARD_RELATIVE_PATHS],
## These calls need to be on separate lines for aclocal to work!
[adl_COMPUTE_RELATIVE_PATHS(dnl
adl_STANDARD_RELATIVE_PATH_LIST)])

dnl adl_STANDARD_RELATIVE_PATH_LIST
dnl ===============================
dnl A list of standard paths, ready to supply to adl_COMPUTE_RELATIVE_PATHS.
AC_DEFUN([adl_STANDARD_RELATIVE_PATH_LIST],
[pushdef([TRIPLET],
[$][1:$][2:$][2_forward_relative_path $]dnl
[2:$][1:$][2_backward_relative_path])dnl
TRIPLET(prefix, exec_prefix) dnl
TRIPLET(exec_prefix, bindir) dnl
TRIPLET(exec_prefix, libdir) dnl
TRIPLET(exec_prefix, libexecdir) dnl
TRIPLET(exec_prefix, sbindir) dnl
TRIPLET(prefix, datadir) dnl
TRIPLET(prefix, sysconfdir) dnl
TRIPLET(prefix, sharestatedir) dnl
TRIPLET(prefix, localstatedir) dnl
TRIPLET(prefix, infodir) dnl
TRIPLET(prefix, lispdir) dnl
TRIPLET(prefix, includedir) dnl
TRIPLET(prefix, oldincludedir) dnl
TRIPLET(prefix, mandir) dnl
popdef([TRIPLET])])