[analog-help] png.c and ioapi.c won't compile under AIX

[Sara Michale Smith]

Hi,
I am trying to compile analog 6.0 on our IBM webserver. It is AIX 
version 5.3 with the IBM XL C Compiler version 7.0.0.6.  Most of the 
files compile, but png.c and ioapi.c do not.  Here are the errors.  Any 
ideas?

Thanks!
-- Sara

        cd libpng && make         'CC=cc            ' 
'ALLCFLAGS=-O2      -DUNIX         '
        cc             -O2      -DUNIX           -c png.c
"png.c", line 153.21: 1506-280 (W) Function argument assignment between 
types "unsigned char*" and "struct png_struct_def*" is not allowed.
"png.c", line 153.38: 1506-280 (W) Function argument assignment between 
types "unsigned char*" and "struct png_color_struct*" is not allowed.


        cd unzip && make         'CC=cc            ' 'ALLCFLAGS=-O2      
-DUNIX         '
        cc             -O2      -DUNIX           -c ioapi.c
"ioapi.c", line 86.12: 1506-068 (W) Operation between types "unsigned 
char*" and "struct {...}*" is not allowed.