[issue1506] func alloca inside ctypes lib needs #include <alloca.h> on solaris

[Greg Couch]

Greg Couch added the comment:

A better solution would be to use the HAVE_ALLOCA and HAVE_ALLOCA_H
defines that fficonfig.h provides to decide whether or not to include
alloca.h.  And in callproc.c whether or not to provide a workaround
using malloc (I'm assuming non-gcc sparc compilers also support alloca
for sparc/ffi.c, but I don't know for sure).

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nosy: +gregcouch

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