v3's configure chdir'ing to a nonexistant directory

[Phil Edwards <pedwards at disaster dot jaj dot com>]

This change

    2001-05-18  Benjamin Kosnik  <bkoz@redhat.com>

        * acinclude.m4 (GLIBCPP_EXPORT_INSTALL_INFO): Set glibcpp_srcdir
        amd glibcpp_prefixdir with absolute paths.

    *** acinclude.m4        2001/05/14 01:15:28     1.145
    --- acinclude.m4        2001/05/18 07:24:22     1.146
    ***************
    *** 1578,1587 ****
      glibcpp_toolexeclibdir=no

      # Export build and source directories.
    ! tmp_builddir=`pwd`
    ! glibcpp_builddir=$tmp_builddir
    ! glibcpp_srcdir=${srcdir}
    ! glibcpp_prefixdir=${prefix}

      AC_MSG_CHECKING([for interface version number])
      libstdcxx_interface=$INTERFACE
    --- 1578,1587 ----
      glibcpp_toolexeclibdir=no

      # Export build and source directories.
    ! # These need to be absolute paths, thus the use of pwd.
    ! glibcpp_builddir=`pwd`
    ! glibcpp_srcdir=`cd ${srcdir} && pwd`
    ! glibcpp_prefixdir=`cd ${prefix} && pwd`

      AC_MSG_CHECKING([for interface version number])
      libstdcxx_interface=$INTERFACE

breaks mkcheck, and will break anything we add in the future which uses
glibcpp_prefixdir (right now, only mkcheck).

We're cd'ing to $prefix, which doesn't necessarily exist until 'make
install' time.  If it doesn't exist, glibcpp_prefixdir gets set to empty.
During mkcheck, we invoke "${glibcpp_prefixdir}/bin/g++" as the installed
compiler, and /bin/g++ doesn't exist -- fortunately, else I'd be testing
the wrong one...

Right now, I have to 'make install', then go back into the v3 build dir,
recheck and regen, and then the directory is there to be cd'd into.


I think I understand why the build and source directories must be absolute
(wasn't really paying attention to that thread, I admit), but why the
install directory?


Phil

-- 
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