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1. On Solaris, inet_ntop and inet_pton need to be linked against
-lnsl. AC_CHECK_FUNC() isn't good enough unless LIBS already
has -lnsl.
2. On IRIX, the blanket redefinition of the inet_ntop function
prototype is incorrect (compiling with MIPSpro 7.4):
cc-1143 cc: ERROR File = inet_v6defs.h, Line = 32
Declaration is incompatible with
"const char *inet_ntop(int, const void *, char *, socklen_t)"
(declared at line 89 of "/usr/include/arpa/inet.h").
extern const char *inet_ntop(int af, const void *src, char *dst,
^
1 error detected in the compilation of "inet_pton.c".
gmake[4]: *** [inet_pton.o] Error 2
On IRIX, the correct prototype is:
extern const char *inet_ntop(int, const void *, char *, socklen_t);
Rather than blindly replacing the prototype we detect if a
prototype exists and define it only if one does not exist.
svn path=/trunk/; revision=7218
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