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)