Re: [Lynx-dev] lynx under OSX 10.4 (Tiger) fails 'make' @ "h_addr" ; OK under 10.3.X

[OpenMacNews]

hi thomas,

thx for your reply =)

> > has something in the 'gethost' family changed under Tiger?
>
> apparently.  Perhaps a look at the related header files would help.
> For instance on Solaris, that's defined in /usr/include/netdb.h,
> e.g.,
>
> struct  hostent {
>         char    *h_name;        /* official name of host */
>         char    **h_aliases;    /* alias list */
>         int     h_addrtype;     /* host address type */
>         int     h_length;       /* length of address */
>         char    **h_addr_list;  /* list of addresses from name server */
> # define        h_addr  h_addr_list[0]  /* address, for backward compatiblity */
> };
>
> Seeing a "#define" there gives the impression that someone might have
> decided to break compatibility by removing it on some other system.


based on your suggestion of where to look, i note checking:

in Tiger's "/usr/include/netdb.h":

        struct  hostent {
                char    *h_name;    /* official name of host */
                char    **h_aliases;    /* alias list */
                int h_addrtype; /* host address type */
                int h_length;   /* length of address */
                char    **h_addr_list;  /* list of addresses from name server */
        #ifndef _POSIX_C_SOURCE
        #define h_addr  h_addr_list[0]  /* address, for backward compatiblity */
        #endif /* !_POSIX_C_SOURCE */
        };

in bind931's equiv (built on 10.4) "/usr/local/bind9/bind/include/netdb.h":

        struct  hostent {
                char    *h_name;    /* official name of host */
                char    **h_aliases;    /* alias list */
                int h_addrtype; /* host address type */
                int h_length;   /* length of address */
                char    **h_addr_list;  /* list of addresses from name server */
        #define h_addr  h_addr_list[0]  /* address, for backward compatiblity */
        };

and in OSX 10.3.9's "/usr/include/netdb.h":

   struct  hostent {
       char    *h_name;    /* official name of host */
       char    **h_aliases;    /* alias list */
       int h_addrtype; /* host address type */
       int h_length;   /* length of address */
       char    **h_addr_list;  /* list of addresses from name server */
   #define h_addr  h_addr_list[0]  /* address, for backward compatiblity
   };

so, to my naive read, the define *is* properly defined, but the

        #ifndef _POSIX_C_SOURCE

conditional is suspect.

making a temp change to /usr/include/netdb.h, removing the conditional:

        struct  hostent {
                char    *h_name;    /* official name of host */
                char    **h_aliases;    /* alias list */
                int h_addrtype; /* host address type */
                int h_length;   /* length of address */
                char    **h_addr_list;  /* list of addresses from name server */
---     #ifndef _POSIX_C_SOURCE
        #define h_addr  h_addr_list[0]  /* address, for backward compatiblity */
---     #endif /* !_POSIX_C_SOURCE */
        };


then re-configure & make complete successfully:

% which lynx
        /usr/local/bin/lynx

% ls -al /usr/local/bin/lynx
        -rwxr-xr-x  1 root wheel 1279580 May  1 13:33 /usr/local/bin/lynx

% lynx -version
        Lynx Version 2.8.5rel.1 (04 Feb 2004)
        libwww-FM 2.14, SSL-MM 1.4.1, OpenSSL 0.9.7g
        Built on darwin8.0.0 May  1 2005 13:26:16



so the question is, what/where to change?

options seem to be:

(a) change /usr/include/netdb.h
(b) clone & change /usr/local/include/netdb.h
(c) link against external BIND931 build's libs/includes
(d) change code in lynx src (UN-defining _POSIX_C_SOURCE, perhaps?)

i worry that, in any case other than (d), some OTHER app will "suffer" from the 
change to netdb.h ...

cheers,

richard