Build system: use SPDX identifiers

[urcu.git] / m4 / ax_require_defined.m4

diff --git a/m4/ax_require_defined.m4 b/m4/ax_require_defined.m4
index 17c3eab7dafde6c1358c7c189bbe44a6e14995a7..6de1b2a5a2f068825b69b1f4940aff49a6947989 100644 (file)
--- a/m4/ax_require_defined.m4
+++ b/m4/ax_require_defined.m4
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: FSFAP
 # ===========================================================================
 #    https://www.gnu.org/software/autoconf-archive/ax_require_defined.html
 # ===========================================================================