On 11/06/2014 03:05 PM, A. Klitzing wrote: > Hi there, > > we tried to compile gnutls for iOS and needed to patch it because iOS does > not have a crt_externs.h include.
crt_externs.h is not a standardized header; it also does not have a listing under gnulib's docs/glibc-headers/ directory. The only mention I see of it is that on MacOS, it is a file available for declaration of 'environ' (where declaring environ by hand fails on that platform); and the usage in lib/unistd.in.h is supposed to be appropriately guarded: #if @GNULIB_ENVIRON@ # if !@HAVE_DECL_ENVIRON@ /* Set of environment variables and values. An array of strings of the form "VARIABLE=VALUE", terminated with a NULL. */ # if defined __APPLE__ && defined __MACH__ # include <crt_externs.h> # define environ (*_NSGetEnviron ()) Okay, I see what you are complaining about - compiling for iOS satisfies the __APPLE__ and even the __MACH__ defines, but is different than a MacOS box, so it needs _yet another_ solution for how to declare 'environ' for use on iOS. I refuse to use iOS myself (it is non-free software), so I cannot validate if your patch is correct, so I hope someone else will join the thread. But off-hand, it seems reasonable. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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