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-rw-r--r--shell/Makefile4
1 files changed, 4 insertions, 0 deletions
diff --git a/shell/Makefile b/shell/Makefile
index 5c56a27..c29ec34 100644
--- a/shell/Makefile
+++ b/shell/Makefile
@@ -4,8 +4,12 @@
#
# Licensed under the GPL v2, see the file LICENSE in this tarball.
+ifndef top_srcdir
top_srcdir=..
+endif
+ifndef top_builddir
top_builddir=..
+endif
srcdir=$(top_srcdir)/shell
SHELL_DIR:=./
include $(top_builddir)/Rules.mak