+# Enforce strict data.
+case "$isgcc" in
+gcc) ;;
+*) # -trapuv poisons uninitialized stack with
+ # 0xfff58005fff58005 which is as a pointer a segmentation fault and
+ # as a floating point a signaling NaN. As integers/longs that causes
+ # no traps but at least it is not zero.
+ # -readonly_strings moves string constants into read-only section
+ # which hopefully means that modifying them leads into segmentation
+ # faults.
+ for i in -trapuv -readonly_strings
+ do
+ case "$ccflags" in
+ *$i*) ;;
+ *) ccflags="$ccflags $i" ;;
+ esac
+ done
+ ;;
+esac
+
+# In Tru64 several slightly incompatible socket APIs are supported,
+# which one applies is chosen with a set of defines:
+# -D_SOCKADDR_LEN enables 4.4BSD and IPv6 interfaces
+# -D_POSIX_PII_SOCKET enables socklen_t instead of size_t
+for i in -D_SOCKADDR_LEN -D_POSIX_PII_SOCKET
+do
+ case "$ccflags" in
+ *$i*) ;;
+ *) ccflags="$ccflags $i" ;;
+ esac
+done
+# For OSF/1 3.2, however, defining _SOCKADDR_LEN would be
+# a bad idea since it breaks send() and recv().
+case "$ccflags" in
+*DEC_OSF1_3_X*SOCKADDR_LEN*)
+ ccflags=`echo " $ccflags " | sed -e 's/ -D_SOCKADDR_LEN / /'`
+ ;;
+esac
+
+# These are in libm, but seem broken (there are no protos in headers,
+# or man pages, either)
+d_fdim='undef'
+d_fma='undef'
+d_fmax='undef'
+d_fmin='undef'
+d_llrint='undef'
+d_llround='undef'
+d_lrint='undef'
+d_lround='undef'
+d_nan='undef'
+d_nearbyint='undef'
+d_round='undef'
+d_scalbn='undef'
+d_tgamma='undef'
+