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-rw-r--r--m4/ax_pthread.m42
1 files changed, 2 insertions, 0 deletions
diff --git a/m4/ax_pthread.m4 b/m4/ax_pthread.m4
index 9f35d13..3f26da6 100644
--- a/m4/ax_pthread.m4
+++ b/m4/ax_pthread.m4
@@ -1,3 +1,5 @@
+dnl SPDX-License-Identifier: GPL-3.0-or-later WITH Autoconf-exception-macro
+
# ===========================================================================
# https://www.gnu.org/software/autoconf-archive/ax_pthread.html
# ===========================================================================