From 35195bb5cea5d99eb3eaf41e3815137d14ceb52d Mon Sep 17 00:00:00 2001
From: Devin Matthews <damatthews@smu.edu>
Date: Mon, 31 Jan 2022 10:29:50 -0600
Subject: [PATCH] Add armclang detection to configure.

armclang is treated as regular clang. Fixes #606. [ci skip]
---
 configure | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/configure b/configure
index 1abe7610e..95a97c6b1 100755
--- a/configure
+++ b/configure
@@ -1464,17 +1464,31 @@ get_compiler_version()
 		cc_vendor="aocc"
 	fi
 
+	# Detect armclang, which doesn't have a nice, unambiguous, one-word tag
+	armclang_grep=$(echo "${vendor_string}" | grep 'Arm C/C++/Fortran Compiler')
+	if [ -n "${armclang_grep}" ]; then
+		cc_vendor="armclang"
+	fi
+
 	# Begin parsing cc_vendor for the version string.
 
 	if [ "${cc_vendor}" = "crosstool-NG" ]; then
 	     # Treat compilers built by crosstool-NG (for eg: conda) as gcc.
-	     cc_vendor="gcc"
+		cc_vendor="gcc"
 	fi
 	if [ "${cc_vendor}" = "icc" -o \
 	     "${cc_vendor}" = "gcc" ]; then
 
 		cc_version=$(${cc} -dumpversion)
 
+	elif [ "${cc_vendor}" = "armclang" ]; then
+
+		# Treat armclang as regular clang.
+		cc_vendor="clang"
+		cc_version=$(echo "${vendor_string}" \
+		             | egrep -o 'based on LLVM [0-9]+\.[0-9]+\.?[0-9]*' \
+		             | egrep -o               '[0-9]+\.[0-9]+\.?[0-9]*')
+
 	elif [ "${cc_vendor}" = "clang" ]; then
 
 		cc_version=$(echo "${vendor_string}" \