+ AC_REQUIRE([AC_C_RESTRICT])
+
+ dnl Most platforms that provide inet_pton define it in libc.
+ dnl Solaris 8..10 provide inet_pton in libnsl instead.
+ dnl Solaris 2.6..7 provide inet_pton in libresolv instead.
+ dnl Native Windows provides it in -lws2_32 instead, with a declaration in
+ dnl <ws2tcpip.h>, and it uses stdcall calling convention, not cdecl
+ dnl (hence we cannot use AC_CHECK_FUNCS, AC_SEARCH_LIBS to find it).
+ HAVE_INET_PTON=1
+ INET_PTON_LIB=
+ gl_PREREQ_SYS_H_WINSOCK2
+ if test $HAVE_WINSOCK2_H = 1; then
+ AC_CHECK_DECLS([inet_pton],,, [[#include <ws2tcpip.h>]])
+ if test $ac_cv_have_decl_inet_pton = yes; then
+ dnl It needs to be overridden, because the stdcall calling convention
+ dnl is not compliant with POSIX.
+ REPLACE_INET_PTON=1
+ INET_PTON_LIB="-lws2_32"
+ else
+ HAVE_DECL_INET_PTON=0
+ HAVE_INET_PTON=0
+ fi
+ else
+ gl_save_LIBS=$LIBS
+ AC_SEARCH_LIBS([inet_pton], [nsl resolv], [],
+ [AC_CHECK_FUNCS([inet_pton])
+ if test $ac_cv_func_inet_pton = no; then
+ HAVE_INET_PTON=0
+ fi
+ ])
+ LIBS=$gl_save_LIBS
+
+ if test "$ac_cv_search_inet_pton" != "no" \
+ && test "$ac_cv_search_inet_pton" != "none required"; then
+ INET_PTON_LIB="$ac_cv_search_inet_pton"
+ fi