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-rw-r--r--configure.ac.in1
1 files changed, 1 insertions, 0 deletions
diff --git a/configure.ac.in b/configure.ac.in
index 3374a9a..332c718 100644
--- a/configure.ac.in
+++ b/configure.ac.in
@@ -28,6 +28,7 @@ AC_PROG_YACC
AC_PROG_INSTALL
AM_INIT_AUTOMAKE
+AC_GNU_SOURCE
LT_INIT
AX_WITH_CURSES
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