Add witness macro for @top_build_prefix@ substitution.

* lib/autoconf/status.m4 (_AC_HAVE_TOP_BUILD_PREFIX): New macro.
(_AC_OUTPUT_FILE): Mention it here.

diff --git a/ChangeLog b/ChangeLog
index 306635bd6a24b906b9c3d3b70fadde1aececab4f..aa4282dc622dbd5e8b085680575c1b144f87bdc0 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2007-11-15  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>
+
+       Add witness macro for @top_build_prefix@ substitution.
+       * lib/autoconf/status.m4 (_AC_HAVE_TOP_BUILD_PREFIX): New macro.
+       (_AC_OUTPUT_FILE): Mention it here.
+
 2007-11-15  Paolo Bonzini  <bonzini@gnu.org>
        and Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>
 

diff --git a/lib/autoconf/status.m4 b/lib/autoconf/status.m4
index 487cc015259810da153eb14bf5cb86e1008a51a7..0d1d93e7992c970b37cfbfb161f641c805c8ab73 100644 (file)
--- a/lib/autoconf/status.m4
+++ b/lib/autoconf/status.m4
@@ -136,6 +136,11 @@ ac_abs_srcdir=$ac_abs_top_srcdir$ac_dir_suffix
 ])# _AC_SRCDIRS
 
 
+# _AC_HAVE_TOP_BUILD_PREFIX
+# -------------------------
+# Announce to the world (to Libtool) that we substitute @top_build_prefix@.
+AC_DEFUN([_AC_HAVE_TOP_BUILD_PREFIX])
+
 
 ## ---------------------- ##
 ## Registering the tags.  ##
@@ -622,6 +627,7 @@ dnl configure_input is a somewhat special, so we don't call AC_SUBST_TRACE.
 s&@configure_input@&$configure_input&;t t
 dnl During the transition period, this is a special case:
 s&@top_builddir@&$ac_top_builddir_sub&;t t[]AC_SUBST_TRACE([top_builddir])
+dnl For this substitution see the witness macro _AC_HAVE_TOP_BUILD_PREFIX above.
 s&@top_build_prefix@&$ac_top_build_prefix&;t t[]AC_SUBST_TRACE([top_build_prefix])
 m4_foreach([_AC_Var], [srcdir, abs_srcdir, top_srcdir, abs_top_srcdir,
                        builddir, abs_builddir,