checking bits/type_traits.h usability... no
checking bits/type_traits.h presence... no
checking for bits/type_traits.h... no
checking type_traits.h usability... no
checking type_traits.h presence... yes
configure: WARNING: type_traits.h: present but cannot be compiled
configure: WARNING: type_traits.h:     check for missing prerequisite headers?
configure: WARNING: type_traits.h: see the Autoconf documentation
configure: WARNING: type_traits.h:     section "Present But Cannot Be Compiled"
configure: WARNING: type_traits.h: proceeding with the preprocessor's result
configure: WARNING: type_traits.h: in the future, the compiler will take precedence
checking for type_traits.h... yes