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# AS_VERSION_COMPARE(VERSION-1, VERSION-2,
# [ACTION-IF-LESS], [ACTION-IF-EQUAL], [ACTION-IF-GREATER])
# -----------------------------------------------------------------------------
# Compare two strings possibly containing shell variables as version strings.
AC_DEFUN([AS_VERSION_COMPARE],
[if test "x[$1]" = "x[$2]"; then
# the strings are equal. run ACTION-IF-EQUAL and bail
m4_default([$4], :)
m4_ifvaln([$3$5], [else
# first unletter the versions
# this only works for a single trailing letter
dnl echo has a double-quoted arg to allow for shell expansion.
as_version_1=`echo "[$1]" |
sed 's/\([abcedfghi]\)/.\1/;
s/\([jklmnopqrs]\)/.1\1/;
s/\([tuvwxyz]\)/.2\1/;
y/abcdefghijklmnopqrstuvwxyz/12345678901234567890123456/;'`
as_version_2=`echo "[$2]" |
sed 's/\([abcedfghi]\)/.\1/;
s/\([jklmnopqrs]\)/.1\1/;
s/\([tuvwxyz]\)/.2\1/;
y/abcdefghijklmnopqrstuvwxyz/12345678901234567890123456/;'`
as_count=1
as_save_IFS=$IFS
IFS=.
as_retval=-1
for vsub1 in $as_version_1; do
vsub2=`echo "$as_version_2" |awk -F. "{print \\\$$as_count}"`
if test -z "$vsub2" || test $vsub1 -gt $vsub2; then
as_retval=1
break
elif test $vsub1 -lt $vsub2; then
break
fi
as_count=`expr $as_count + 1`
done
IFS=$as_save_IFS
if test $as_retval -eq -1; then
m4_default([$3], :)
m4_ifval([$5], [else
$5])
fi])
fi
]) # AS_VERSION_COMPARE
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