concepts: require lib support to enable concepts

For example when using clang + libc vs libstdc++. Signed-off-by: Noah Watkins <[email protected]> Message-Id: <[email protected]>
abha8517 · Mar 9, 2021 · 66ba7b1 · 66ba7b1
1 parent 593406a
commit 66ba7b1
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/include/seastar/util/concepts.hh b/include/seastar/util/concepts.hh
@@ -20,7 +20,8 @@
  */
 #pragma once
 
-#if defined(__cpp_concepts) && __cpp_concepts >= 201907
+#if defined(__cpp_concepts) && __cpp_concepts >= 201907 && \
+    defined(__cpp_lib_concepts) && __cpp_lib_concepts >= 201907
 
 #define SEASTAR_CONCEPT(x...) x
 #define SEASTAR_NO_CONCEPT(x...)