From 432f5d64e369f8b63cab9ce65ea2e9b9ee5c386d Mon Sep 17 00:00:00 2001
From: Alex Richert <82525672+AlexanderRichert-NOAA@users.noreply.github.com>
Date: Tue, 21 Nov 2023 17:08:02 -0800
Subject: [PATCH] Add cxx17_flag to intel.py (#41207)

* Add cxx17_flag to intel.py
---
 lib/spack/spack/compilers/intel.py | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/lib/spack/spack/compilers/intel.py b/lib/spack/spack/compilers/intel.py
index 4ec2960525..d4ff7c5ebc 100644
--- a/lib/spack/spack/compilers/intel.py
+++ b/lib/spack/spack/compilers/intel.py
@@ -85,6 +85,14 @@ def cxx14_flag(self):
         else:
             return "-std=c++14"
 
+    @property
+    def cxx17_flag(self):
+        # https://www.intel.com/content/www/us/en/developer/articles/news/c17-features-supported-by-c-compiler.html
+        if self.real_version < Version("19"):
+            raise UnsupportedCompilerFlag(self, "the C++17 standard", "cxx17_flag", "< 19")
+        else:
+            return "-std=c++17"
+
     @property
     def c99_flag(self):
         if self.real_version < Version("12"):