radare2 build failure on Tiger

[mistydemeo]

On Tiger, with GCC 4.0 and 4.2, I'm seeing build failures such as:

In file included from /private/tmp/radare220250116-11869-14xbq3/radare2-5.9.0/libr/include/r_core.h:23,
                 from log.c:5:
/private/tmp/radare220250116-11869-14xbq3/radare2-5.9.0/libr/include/r_debug.h:346: error: redefinition of typ
edef ‘RDebugPluginSession’
/private/tmp/radare220250116-11869-14xbq3/radare2-5.9.0/libr/include/r_debug.h:293: error: previous declaratio
n of ‘RDebugPluginSession’ was here
/private/tmp/radare220250116-11869-14xbq3/radare2-5.9.0/libr/include/r_debug.h:439: error: redefinition of typ
edef ‘RDebug’
/private/tmp/radare220250116-11869-14xbq3/radare2-5.9.0/libr/include/r_debug.h:258: error: previous declaratio
n of ‘RDebug’ was here

Is this expected? Maybe we should mark it as needing a newer GCC.

[sevan]

Ah, yeah. It relies on C11 support. I built it with GCC 5.