--- configure.ac.orig	2023-07-20 23:09:18 UTC
+++ configure.ac
@@ -48,10 +48,7 @@ AC_COMPILER_NAME
 
 # We need a C++11 compiler now - AB 2014-12-12
 # clang-3.8 does not support __float128 without explicitly passing it -std=c++11
-AS_IF([test "x${CCNAM}" = "xclang38"],
-      [AX_CXX_COMPILE_STDCXX_11([noext],[mandatory])],
-      [AX_CXX_COMPILE_STDCXX_11([ext],[mandatory])]
-      )
+AX_CXX_COMPILE_STDCXX_11([noext],[mandatory])
 REQUIRED_FLAGS="${CXX11FLAGS}"
 # Add the c++11 flags for the configure compilations as clang needs it to work properly with a glibc++ compiled with gcc
 CXXFLAGS="${CXX11FLAGS} ${CXXFLAGS}"