Re: Missing feature in 5.3: LUA_FLOAT_NONE for crippled C libraries

[Real Time Logic <realtimelogic@...>]

> It would be more useful if you give concrete data, instead of generic
> claims. Which/where floating point functions are used in the code? Which
> constants? Why they are difficult to be corrected through the
> configuration file?

I have included the complete error log below. The errors I get are 
related to standard float functions such as floor, freexp, etc. I see 
you wrap all of these calls in macro l_mathop, but I do not see how I 
can cirumvent the use of the floating point library calls by modifying 
l_mathop (i.e. by only modifying the config file). You can also see from 
the log below the errors I get on math contants such as HUGE_VAL, 
DBL_MANT_DIG, etc..


> Of course, the best solution for you is to get your specific needs
> fulfilled (that seems to be an univeral truth). The best solution for us
> may involve some other metric.
>
> -- Roberto

Yes, I do understand Roberto, but I would think a "non float" option 
would be very common feature that fits many Lua use cases.

-Wilfred

The errors:

(Note: the missing prototype errors are not from not including the 
correct header file. The functions simply do not exist in the C library).

### mwccmcf Compiler:
#    File: R:\src\plugins\lua\lobject.c
# -------------------------------------
#     112:     case LUA_OPPOW: return  ((void)L, l_mathop(pow)( v1, v2));
#   Error:                                                    ^
#   function has no prototype
### mwccmcf Compiler:
#     113:  (l_mathop(floor)((( v1)/( v2))))
#   Error:                  ^
#   function has no prototype
### mwccmcf Compiler:
#     117:        { ( m) = l_mathop(fmod)( v1, v2); if (( m)*( v2) < 0) 
( m) += ( v2); };
#   Error:                               ^
#   function has no prototype
### mwccmcf Compiler:
#     241:   return l_mathop(ldexp)(r, e);
#   Error:          ^^^^^^^^
#   function has no prototype
### mwccmcf Compiler:
#     255:     *result =  strtod((s), ( &endptr));
#   Error:                      ^
#   function has no prototype



### mwccmcf Compiler:
#    File: R:\src\plugins\lua\lstrlib.c
# -------------------------------------
#     826:   lua_Number dd = l_mathop(floor)(x);  /* get integer part 
from 'x' */
#   Error:                   ^^^^^^^^
#   function has no prototype
### mwccmcf Compiler:
#     834:   if (x != x || x == HUGE_VAL || x == -HUGE_VAL)  /* inf or 
NaN? */
#   Error:                      ^^^^^^^^
#   undefined identifier 'HUGE_VAL'
### mwccmcf Compiler:
#     843:     lua_Number m = l_mathop(frexp)(x, &e);  /* 'x' fraction 
and exponent */
#   Error:                    ^^^^^^^^
#   function has no prototype
### mwccmcf Compiler:
#     850: (DBL_MANT_DIG)
#   Error:              ^
#   undefined identifier 'DBL_MANT_DIG'
### mwccmcf Compiler:
#     851: (DBL_MANT_DIG)
#   Error:              ^
#   undefined identifier 'DBL_MANT_DIG'
### mwccmcf Compiler:
#     971:  (DBL_MAX_10_EXP)
#   Error:                 ^
#   undefined identifier 'DBL_MAX_10_EXP'

Errors caused tool to abort.
### mwccmcf Compiler:
#    File: R:\src\plugins\lua\ltable.c
# ------------------------------------
#     102:   n = l_mathop(frexp)(n, &i) * -cast_num(INT_MIN);
#   Error:       ^^^^^^^^
#   function has no prototype



### mwccmcf Compiler:
#    File: R:\src\plugins\lua\lvm.c
# ---------------------------------
#      99:     lua_Number f =  (l_mathop(floor)(n));
#   Error:                                     ^
#   function has no prototype
### mwccmcf Compiler:
#     270: (DBL_MANT_DIG)
#   Error:              ^
#   undefined identifier 'DBL_MANT_DIG'
### mwccmcf Compiler:
#     289: (DBL_MANT_DIG)
#   Error:              ^
#   undefined identifier 'DBL_MANT_DIG'
### mwccmcf Compiler:
#     951:            { ( m) = l_mathop(fmod)( nb, nc); if (( m)*( nc) < 
0) ( m) += ( nc); };
#   Error:                                   ^
#   function has no prototype
### mwccmcf Compiler:
#     966: ); val_(io).n=( ((void)L, (floor((( nb)/( nc)))))); 
settt_(io, LUA_TNUMFLT); };
#   Error:                                 ^
#   function has no prototype
### mwccmcf Compiler:
#     976: (ra); val_(io).n=( ((void)L, pow( nb, nc))); settt_(io, 
LUA_TNUMFLT); };
#   Error:                                 ^
#   function has no prototype