[rrd-developers] rrdtool-1.2.10 configurirng porblem on Solaris 9 with gcc-4.0.0 or later

[hiroshi.fujishima at gmail.com]

Hi,

It cannot configure rrdtool-1.2.10 on Solaris 9 with gcc-4.0.0 or
later.  the error message is following.

checking for isinf... no
checking for isinf with <math.h>... yes
checking if IEEE math works out of the box... no
checking if IEEE math works with the -ieee switch... no
checking if IEEE math works with the -qfloat=nofold switch... no
checking if IEEE math works with the -w -qflttrap=enable:zerodivide... no
checking if IEEE math works with the -mieee switch... no
checking if IEEE math works with the -q float=rndsngl switch... no
checking if IEEE math works with the -OPT:IEEE_NaN_inf=ON switch... no
checking if IEEE math works with the -OPT:IEEE_comparisons=ON switch... no
checking if IEEE math works with fpsetmask(0)... no
checking if IEEE math works with signal(SIGFPE,SIG_IGN)... no
configure: error:
Your Compiler does not do propper IEEE math ... Please find out how to
make IEEE math work with your compiler and let me know (oetiker at ee.ethz.ch).
Check config.log to see what went wrong ...

The configure script checks isinf with <math.h> as following.

#include <math.h>
int
main ()
{
float f = 0.0; isinf(f)
  ;
  return 0;
}

Gcc-4.0.0 or later eliminates calls to pure functions whose return
value is not used.[1] So compilation of the above code is succeed and
the HAVE_ISINF macro is defined if the system does not have isinf().

Therefore, the following isinf(a) macro is not defined.

/* Solaris */
#if (! defined(HAVE_ISINF) && defined(HAVE_FPCLASS))
#  define HAVE_ISINF 1
#  define isinf(a) (fpclass(a) == FP_NINF || fpclass(a) == FP_PINF)
#endif

Jakub Jelinek suggested the solution in gcc at gcc.gnu.org list.[2] Could
anyone take look it?

[1] http://article.gmane.org/gmane.comp.gcc.devel/69128
[2] http://article.gmane.org/gmane.comp.gcc.devel/69154

Regards.

-- 
Hiroshi Fujishima

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