testvarious fails

[beppe]

I'm trying to install proj-4.7.0 on an AIX 5.3. The configuration and build steps are OK but the make check fails with the following error:

./testvarious ../src/cs2cs
============================================
Running ./testvarious using ../src/cs2cs:
============================================
doing tests into file tv_out, please wait
diff tv_out with tv_out.dist
25,26c25,26
< 0d00'00.000"W 0d00'00.000"N 0.0       6378137.00      0.00 0.00
< 0d00'00.000"W 0d00'00.000"N 10.0      6378147.00      0.00 0.00
---
> 0d00'00.000"W 0d00'00.000"N 0.0       6378137.00      -0.00 0.00
> 0d00'00.000"W 0d00'00.000"N 10.0      6378147.00      -0.00 0.00
28c28
< 0d00'00.000"W 90d00'00.000"N 0.0      0.00    0.00 6356752.31
---
> 0d00'00.000"W 90d00'00.000"N 0.0      0.00    -0.00 6356752.31
31c31
< 6378137.00      -0.00 0.00    0dE     0dN -0.000
---
> 6378137.00      -0.00 0.00    0dE     0dN 0.000

PROBLEMS HAVE OCCURED
test file tv_out saved

Any idea about this error?

[warmerdam]

This looks like a subtle issue with roundoff, and floating point representations of positive and negative zero. I don't know how to avoid it but I do not think it represents a meaningful failure. As such I'm going to close the ticket.