i_unistd='undef'
# See util.c for another: We need _SC_OPEN_MAX, which is in
# <unistd.h>.
-util_cflags='ccflags="$ccflags -DI_UNISTD"'
+
+# fflush(NULL) will core dump on SunOS 4.1.3. In util.c we'll
+# try explicitly fflushing all open files. Unfortunately,
+# on my SunOS 4.1.3 system, sysconf(_SC_OPEN_MAX) returns
+# 64, but only 32 of those file pointers can be accessed
+# directly by _iob[i]. The remainder are off in dynamically
+# allocated memory somewhere and I don't know to automatically
+# fflush() them. -- Andy Dougherty Wed May 26 15:25:22 EDT 1999
+util_cflags='ccflags="$ccflags -DPERL_FFLUSH_ALL_FOPEN_MAX=32"'
cat << 'EOM' >&4