From c8728cfbd19ecde9d43af05829e00bcfe7d86eed Mon Sep 17 00:00:00 2001
From: "Field G. Van Zee" <field@cs.utexas.edu>
Date: Thu, 5 Aug 2021 15:17:09 -0500
Subject: [PATCH] Fixed configure breakage on OSX clang.

Details:
- Accept either 'clang' or 'LLVM' in vendor string when greping for
  the version number (after determining that we're working with clang).
  Thanks to Devin Matthews for this fix.
---
 configure | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/configure b/configure
index 27986204a..fd4f49038 100755
--- a/configure
+++ b/configure
@@ -1422,7 +1422,7 @@ get_compiler_version()
 		cc_version=$(${cc} -dumpversion)
 	# If compiler is AOCC, first grep for clang and then the version number.
 	elif [ "${cc_vendor}" = "clang" ]; then
-		cc_version=$(echo "${vendor_string}" | egrep -o 'clang version [0-9]+\.[0-9]+\.?[0-9]*' | egrep -o '[0-9]+\.[0-9]+\.?[0-9]*')
+		cc_version=$(echo "${vendor_string}" | egrep -o '(clang|LLVM) version [0-9]+\.[0-9]+\.?[0-9]*' | egrep -o '[0-9]+\.[0-9]+\.?[0-9]*')
 	elif [ "${cc_vendor}" = "oneAPI" ]; then
 		# Treat Intel oneAPI's clang as clang, not icc.
 		cc_vendor="clang"