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-rw-r--r--configure.ac1
1 files changed, 1 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac
index f8390ec9..8a573706 100644
--- a/configure.ac
+++ b/configure.ac
@@ -58,6 +58,7 @@ winnt) ;;
;;
esac
+AC_CHECK_HEADER([zlib.h],, [AC_MSG_ERROR([[cannot find zlib.h]])])
AC_CHECK_LIB([z], [zlibVersion],, [AC_MSG_ERROR([[cannot find zlib]])])
VL_LIB_READLINE([have_libreadline=yes], [have_libreadline=no])