# This script is used by test/Makefile.ssl to check whether a sane 'bc'
# is installed.
# ('make test_bn' should not try to run 'bc' if it does not exist or if
-# it is the broken SunOS 5.[78] bc, which fails the following test.)
+# it is a broken 'bc' version that is known to cause trouble.)
#
# If 'bc' works, we also test if it knows the 'print' command.
#
# In any case, output an appropriate command line for running (or not
# running) bc.
-if [ 0 != "`bc <<\EOF
+
+IFS=:
+try_without_dir=true
+# First we try "bc", then "$dir/bc" for each item in $PATH.
+for dir in dummy:$PATH; do
+ if [ "$try_without_dir" = true ]; then
+ # first iteration
+ bc=bc
+ try_without_dir=false
+ else
+ # second and later iterations
+ bc="$dir/bc"
+ if [ ! -f "$bc" ]; then # '-x' is not available on Ultrix
+ bc=''
+ fi
+ fi
+
+ if [ ! "$bc" = '' ]; then
+ failure=none
+
+
+ # Test for SunOS 5.[78] bc bug
+ "$bc" >tmp.bctest <<\EOF
obase=16
ibase=16
a=AD88C418F31B3FC712D0425001D522B3AE9134FF3A98C13C1FCC1682211195406C1A6C66C6A\
8B3CD64126E1A82E190228020C05B91C8B141F1110086FC2A4C6ED631EBA129D04BB9A19FC53D\
3ED0E2017D60A68775B75481449
(a/b)*b + (a%b) - a
-EOF`" ]
-then
- echo "bc does not work. Consider installing GNU bc." >&2
- echo "cat >/dev/null"
- exit 1
-fi
+EOF
+ if [ 0 != "`cat tmp.bctest`" ]; then
+ failure=SunOStest
+ fi
-if [ "0
-0" != "`bc <<\EOF
+ if [ "$failure" = none ]; then
+ # Test for SCO bc bug.
+ "$bc" >tmp.bctest <<\EOF
obase=16
ibase=16
-FFDD63BA1A4648F0D804F8A1C66C53F0D2110590E8A3907EC73B4AEC6F15AC177F176F2274D2\
9E8DB6A8C3B1B9986D57ED5419C2E855F7D5469E35E76334BB42F4C43E3F3A31B9697C171DAC4\
D97935A7E1A14AD209D6CF811F55C6DB83AA9E6DFECFCD6669DED7171EE22A40C6181615CAF3F\
5296964
-EOF`" ]
-then
- echo "bc does not work. Consider installing GNU bc." >&2
- echo "cat >/dev/null"
- exit 1
-fi
+EOF
+ if [ "0
+0" != "`cat tmp.bctest`" ]; then
+ failure=SCOtest
+ fi
+ fi
-# bc works, good.
-# Now check if it knows the 'print' command.
-if [ "OK" = "`bc 2>/dev/null <<\EOF
-print \"OK\"
-EOF`" ]
-then
- echo "bc"
-else
- echo "sed 's/print.*//' | bc"
-fi
+ if [ "$failure" = none ]; then
+ # bc works; now check if it knows the 'print' command.
+ if [ "OK" = "`echo 'print \"OK\"' | $bc 2>/dev/null`" ]
+ then
+ echo "$bc"
+ else
+ echo "sed 's/print.*//' | $bc"
+ fi
+ exit 0
+ fi
-exit 0
+ echo "$bc does not work properly ('$failure' failed). Looking for another bc ..." >&2
+ fi
+done
+
+echo "No working bc found. Consider installing GNU bc." >&2
+if [ "$1" = ignore ]; then
+ echo "cat >/dev/null"
+ exit 0
+fi
+exit 1