new file

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@6233 ec53bebd-3082-4978-b11e-865c3cabbd6b

cf/check-netinet-ip-and-tcp.m4

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+dnl
+dnl $Id$
+dnl
+
+dnl extra magic check for netinet/{ip.h,tcp.h} because on irix 6.5.3
+dnl you have to include standards.h before including these files
+
+AC_DEFUN(CHECK_NETINET_IP_AND_TCP,
+[
+AC_CHECK_HEADERS(standards.h)
+for i in netinet/ip.h netinet/tcp.h; do
+
+cv=`echo "$i" | sed 'y%./+-%__p_%'`
+
+AC_MSG_CHECKING([for $i])
+AC_CACHE_VAL([ac_cv_header_$cv],
+[AC_TRY_CPP([\
+#ifdef HAVE_STANDARDS_H
+#include <standards.h>
+#endif
+#include <$i>
+],
+eval "ac_cv_header_$cv=yes",
+eval "ac_cv_header_$cv=no")])
+AC_MSG_RESULT(`eval echo \\$ac_cv_header_$cv`)
+changequote(, )dnl
+if test `eval echo \\$ac_cv_header_$cv` = yes; then
+  ac_tr_hdr=HAVE_`echo $i | sed 'y%abcdefghijklmnopqrstuvwxyz./-%ABCDEFGHIJKLMNOPQRSTUVWXYZ___%'`
+changequote([, ])dnl
+  AC_DEFINE_UNQUOTED($ac_tr_hdr, 1, [define if you have a $i])
+fi
+
+done
+])