Re: [Mingw-users] strtod has changed from 4.5.2 to 4.7.0

[LRN <lr...@gm...>]

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On 28.12.2012 11:01, sis...@op... wrote:
> Hi,
> 
> The demo program:
> 
> ################################# #include <stdio.h> #include
> <stdlib.h>
> 
> int main(void) { char * s = "inf"; char *endp; double z;
> 
> z = strtod(s, &endp);
> 
> printf("%f\n", z);
> 
> return 0; }
> 
> #################################
> 
> I build that program with: gcc -o strtod.exe strtod.c
> 
> When I build that with the mingw.org port of gcc-4.5.2 strtod.exe
> outputs 1.#INF00. When I build that with the mingw.org port of
> gcc-4.7.0 strtod.exe outputs 0.000000.
> 
> Why did this change ? Is there something I forgot to do when I
> upgraded ?
> 
> I much prefer that this 4.7.0 compiler (and the perls that I build
> with it) would numify "inf" and "nan" strings to infinity and NaN
> respectively - not to zero.
> 
> What are the options I have for getting the behaviour that I prefer
> ?
> 
If mingwrt was compiled without INFNAN_CHECK, and if it's mingwrt that
provides strtod for you (it's difficult for me to tell, but most
likely it is), then there's nothing you can do, short of re-building
mingwrt.

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