+: check for length of character
+echo " "
+case "$charsize" in
+'')
+ echo "Checking to see how big your characters are (hey, you never know)..." >&4
+ $cat >try.c <<EOCP
+#include <stdio.h>
+#$i_stdlib I_STDLIB
+#ifdef I_STDLIB
+#include <stdlib.h>
+#endif
+int main()
+{
+ printf("%d\n", (int)sizeof(char));
+ exit(0);
+}
+EOCP
+ set try
+ if eval $compile_ok; then
+ dflt=`$run ./try`
+ else
+ dflt='1'
+ echo "(I can't seem to compile the test program. Guessing...)"
+ fi
+ ;;
+*)
+ dflt="$charsize"
+ ;;
+esac
+rp="What is the size of a character (in bytes)?"
+. ./myread
+charsize="$ans"
+$rm_try
+
+: Check for the number of bits in a character
+case "$charbits" in
+'') echo "Checking how long a character is (in bits)..." >&4
+ $cat >try.c <<EOCP
+#include <stdio.h>
+int main ()
+{
+ int n;
+ unsigned char c;
+ for (c = 1, n = 0; c; c <<= 1, n++) ;
+ printf ("%d\n", n);
+ return (0);
+ }
+EOCP
+ set try
+ if eval $compile_ok; then
+ dflt=`$run ./try`
+ else
+ dflt='8'
+ echo "(I can't seem to compile the test program. Guessing...)"
+ fi
+ ;;
+*)
+ dflt="$charbits"
+ ;;
+esac
+rp="What is the length of a character (in bits)?"
+. ./myread
+charbits="$ans"
+$rm_try
+case "$charbits" in
+8) ;;
+*) cat >&4 << EOM
+Your system has an unsigned character size of $charbits bits, which
+is rather unusual (normally it is 8 bits). Perl likely will not work
+correctly on your system, with subtle bugs in various places.
+EOM
+ rp='Do you really want to continue?'
+ dflt='n'
+ . ./myread
+ case "$ans" in
+ [yY]) echo >&4 "Okay, continuing." ;;
+ *) exit 1 ;;
+ esac
+esac
+