GCC_VERSION_SINCE  950 gc.c           #elif defined(__powerpc64__) && GCC_VERSION_SINCE(4,8,0)
GCC_VERSION_SINCE   61 include/ruby/defines.h #ifndef GCC_VERSION_SINCE
GCC_VERSION_SINCE  184 include/ruby/defines.h #if GCC_VERSION_SINCE(4,3,0)
GCC_VERSION_SINCE  566 include/ruby/ruby.h #if GCC_VERSION_SINCE(4,4,0)
GCC_VERSION_SINCE  591 include/ruby/ruby.h #if GCC_VERSION_SINCE(4,4,0)
GCC_VERSION_SINCE 1336 include/ruby/ruby.h #if GCC_VERSION_SINCE(4,4,0)
GCC_VERSION_SINCE   43 internal.h     #elif GCC_VERSION_SINCE(3,4,0)
GCC_VERSION_SINCE   72 internal.h     #if GCC_VERSION_SINCE(4, 6, 0) || __has_extension(c_static_assert)