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-rw-r--r--configure.ac4
1 files changed, 4 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac
index 6e493e5e8..7be9edb87 100644
--- a/configure.ac
+++ b/configure.ac
@@ -254,6 +254,10 @@ AC_SUBST([build_dirs], [$build_dirs])
AC_SUBST([skipped_dirs], [$skipped_dirs])
AC_SUBST([with_dirs], [$with_dirs])
+# fix for older autotools that don't define "abs_top_YYY" by default
+AC_SUBST(abs_top_srcdir)
+AC_SUBST(abs_top_builddir)
+
# 'with' variables - the pre-installed libraries, includes, and paths
# - must always come last in the lists, so they require special
# treatment.