[R] R 1.9.0 on AIX, 64-bit

[Andy Pierce]

I'm trying to get R 1.9.0 running on AIX 5.1 with the standard AIX 
compilers (xlc, xlf) and it is failing 2 of the tests,
test-Reg in reg-tests-1.R like this:

bash-2.05b$ tail -30 reg-tests-1.Rout.fail
      [,1] [,2]
[1,] 1    3
[2,] 2    4
[3,] 1    3
[4,] 2    4
 > stopifnot(typeof(res) == "list")
 > ## were not implemented in 1.8.1
 >
 >
 > ## Date objects with NA's
 > (t1 <- strptime(c("6. Aug. 1930", "3. Nov. 1925", "28. Mar. 1959",
+                  NA, paste(1:29," Feb. 1960", sep=".")),
+                format = "%d. %b. %Y"))
  [1] "1930-08-06" "1925-11-03" "1959-03-28" NA           "1960-02-01"
  [6] "1960-02-02" "1960-02-03" "1960-02-04" "1960-02-05" "1960-02-06"
[11] "1960-02-07" "1960-02-08" "1960-02-09" "1960-02-10" "1960-02-11"
[16] "1960-02-12" "1960-02-13" "1960-02-14" "1960-02-15" "1960-02-16"
[21] "1960-02-17" "1960-02-18" "1960-02-19" "1960-02-20" "1960-02-21"
[26] "1960-02-22" "1960-02-23" "1960-02-24" "1960-02-25" "1960-02-26"
[31] "1960-02-27" "1960-02-28" "1960-02-29"
 > stopifnot(6 == length(print(s1 <- summary(t1))),
+           s1== summary(as.POSIXct(t1)),
+           6 == length(print(format(as.Date(s1)))) )
    Min. 1st Qu.  Median    Mean 3rd Qu.    Max.
      NA      NA      NA      NA      NA      NA
    Min. 1st Qu.  Median    Mean 3rd Qu.    Max.
      NA      NA      NA      NA      NA      NA
Error in if (!(is.logical(r <- eval(ll[[i]])) && all(r))) 
stop(paste(deparse(mc[[i +  :
         missing value where TRUE/FALSE needed
Execution halted

and also in base-Ex.R like this:

bash-2.05b$ tail base-Ex.Rout.fail
 > ### Title: Generate Regular Sequences of Dates
 > ### Aliases: seq.Date
 > ### Keywords: manip chron
 >
 > ### ** Examples
 >
 > ## first days of years
 > seq(as.Date("1910/1/1"), as.Date("1999/1/1"), "years")
Error in fromchar(x) : character string is not in a standard unambiguous 
format
Execution halted

Does anyone have any ideas on how to fix this?

Andy Pierce