From 0afb5bf847a5d498f0a0ff31fe5150c5f70bafb8 Mon Sep 17 00:00:00 2001
From: Jason Volk <jason@zemos.net>
Date: Mon, 25 Jul 2022 14:06:42 -0700
Subject: [PATCH] m4: Always extract major version number in CXX -dumpversion.

---
 tools/m4/ax_cxx_version.m4 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/m4/ax_cxx_version.m4 b/tools/m4/ax_cxx_version.m4
index 8568819c8..1e9a6d10d 100644
--- a/tools/m4/ax_cxx_version.m4
+++ b/tools/m4/ax_cxx_version.m4
@@ -29,7 +29,7 @@ AC_DEFUN([AX_CXX_EPOCH],
 	[
 		AM_COND_IF(GCC,
 		[
-			ax_cv_cxx_epoch="`$CXX -dumpversion`"
+			ax_cv_cxx_epoch="`$CXX -dumpversion | cut -d'.' -f1`"
 		])
 
 		AM_COND_IF(CLANG,