[rrd-developers] rrdtool-1.3.99909060808 configure error

[Tobias Oetiker]

Hi Barrie,

Today Barrie wrote:

> Hi BenBE,
>
> Thanks for the help. I didn't see your post come in, sorry for the late reply.
>
> > It uses the Solaris 10 branch, even though it should use none of them???
> >
> I see the problem now. Just need to work out how to fix it. This is proving to
> be a good learning exercise. :-)
>
> /* solaris 10 it defines isnan such that only forte can compile it ... bad bad
> */
> #if (defined(HAVE_ISNAN) && defined(isnan) && defined(HAVE_FPCLASS))
> #  undef isnan
> #  define isnan(a) (fpclass(a) == FP_SNAN || fpclass(a) == FP_QNAN)
> #endif
>
> Thanks.

note that the way configure works is by trying many things out and
when the fail going on to the next one ... it will take the one
which works ...

have a look at configure.ac and m4/acinclude.m4 how this is done
...

in any event, to code above could be fixed like this:

#if (defined(HAVE_ISNAN) && defined(isnan) && defined(HAVE_FPCLASS) && defined(FP_SNAN) && defined(FP_QNAN))
#  undef isnan
#  define isnan(a) (fpclass(a) == FP_SNAN || fpclass(a) == FP_QNAN)
#endif

I have updated the trunk ... tomorrows snapshot will contain the
change ...

cheers
tobi


> Cheers, Barrie
>
> > Am 09.08.2009 11:52, schrieb Barrie:
> > >/ checking if IEEE math works with signal
> > /The excerpt from the config.log is the following (if I found the correct
> > place).
> >
> > configure:24927: checking if IEEE math works with signal(SIGFPE,SIG_IGN)
> > configure:25019: gcc -o conftest.exe  -D_GNU_SOURCE -fno-strict-aliasing
> > -Wall -std=c99 -pedantic -Wundef -Wshadow -Wpointer-arith -Wcast-align
> > -Wmissing-prototypes -Wmissing-declarations -Wnested-externs -Winline
> > -Wold-style-definition -W  -fPIC -DPIC
> > -L/d/projects/rrdtool_mingw32/contrib
> > -L/d/projects/rrdtool_mingw32/contrib conftest.c  >&5
> > conftest.c:1: warning: -fPIC ignored for target (all code is position
> > independent)
> > conftest.c:116:5: warning: "HAVE_IEEEFP_H" is not defined
> > conftest.c:120:5: warning: "HAVE_FP_CLASS_H" is not defined
> > conftest.c: In function `main':
> > conftest.c:169: warning: implicit declaration of function `fpclass'
> > conftest.c:169: warning: nested extern declaration of `fpclass'
> > conftest.c:169: error: `FP_SNAN' undeclared (first use in this function)
> > conftest.c:169: error: (Each undeclared identifier is reported only once
> > conftest.c:169: error: for each function it appears in.)
> > conftest.c:169: error: `FP_QNAN' undeclared (first use in this function)
> > configure:25023: $? = 1
> > configure: program exited with status 1
> >
> > It uses the Solaris 10 branch, even though it should use none of them???
> >
> > Regards,
> > BenBE.
>
>

-- 
Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland
http://it.oetiker.ch tobi at oetiker.ch ++41 62 775 9902 / sb: -9900