[MacPorts] #68520: zvbi: need to fix endian macros so that old Xcode gcc recognized them

[MacPorts]

#68520: zvbi: need to fix endian macros so that old Xcode gcc recognized them
---------------------------+-----------------------------------------
  Reporter:  barracuda156  |      Owner:  (none)
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.8.1
Resolution:                |   Keywords:  snowleopard, leopard, tiger
      Port:  zvbi          |
---------------------------+-----------------------------------------

Comment (by kencu):

 older gcc compilers (which are the default on Apple PPC) do not define
 {{{__BYTE_ORDER__}}}

 a useful snippet to see the compiler defines from a given compiler is:
 {{{
 echo | /usr/bin/gcc-4.2 -dM -E -
 }}}

 these can change with arguments to the compiler, eg {{{-arch}}}

 {{{
 $ echo | /usr/bin/gcc-4.2 -arch ppc -dM -E - | grep ENDIAN
 #define __BIG_ENDIAN__ 1
 #define _BIG_ENDIAN 1
 }}}

-- 
Ticket URL: <https://trac.macports.org/ticket/68520#comment:3>
MacPorts <https://www.macports.org/>
Ports system for macOS