Ensured that the __has_{builtin,feature,extension}() macros are defined as no-ops in <cpr/prelude.h> in case the compiler doesn't support them, making them safe to use.
Ensured that the __has_{builtin,feature,extension}() macros are
defined as no-ops in <cpr/prelude.h> in case the compiler doesn't
support them, making them safe to use.

See: http://clang.llvm.org/docs/LanguageExtensions.html#feature-checking-macros

dryproject/libcpr,dryproject/libcpr,dryproject/libcpr,dryproject/libcpr,dryproject/libcpr,dryproject/libcpr