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4bbb1f7490
glibc in Fedora is currently configured with `--enable-obsolete-rpc', so I guess we can see which way the wind is blowing. (1) This changes our configure script to prefer libtirpc if it is available. If libtirpc is _not_ available then: (a) Headers must be located in <rpc/xdr.h>, or the user must supply the right CFLAGS. (b) XDR functions must be located in one of -lportablexdr, -lrpc, -lxdr, -lnsl or no library at all (ie. -lc), and the user must set LDFLAGS if needed. (2) We no longer add these paths automatically to $(CFLAGS)/$(LIBS). Any part of libguestfs which needs <rpc/*.h> or the xdr_* functions must use $(RPC_CFLAGS)/$(RPC_LIBS) explicitly. (3) Previously Mac OS X had a workaround for the broken 64 bit support in the supplied rpcgen. This workaround "activates" all the time if you use tirpc, so breaking Linux after the above changes. tirpc is supported on OS X, so I think it's just better to use that rather than the broken rpcgen. For that reason I removed the workaround completely. Thanks: Roy Keene