Re: gnuplot numerical errors on Intel MacBook

[CM <mon...@gm...>]

On 9/23/06, Ethan A Merritt <merritt@u.washington.edu> wrote:
>
> On Saturday 23 September 2006 07:46 pm, CM wrote:
> > I'm sorry.  I should have provided more information.
> >
> > Version of GNUPlot:
> >
> > 4.0 (from fink on Tiger, MacBook Pro)
> > 4.1 (from cvs today, same platform)
> >
> > gamma(x) is returning all negative values, and very, very large ones at
> > that.
>
> Could you please check for compiler warnings or errors during the
> build.  In particular, look to see if any variant of the
> gamma function is mentioned in connection with a message on the
> order of "implicit declaration of built-in function 'lgamma'".
> But please report all warnings or errors.



Here is all of the stderr output (minus the last obvious stuff) that might
be relevant, but appears not to be anyway:

set.c: In function 'set_mouse':
set.c:2309: warning: pointer targets in passing argument 2 of 'map_position'
differ in signedness
set.c:2309: warning: pointer targets in passing argument 3 of 'map_position'
differ in signedness
/usr/bin/ld: warning multiple definitions of symbol _init_color
color.o definition of _init_color in section (__TEXT,__text)
/sw/lib/libncurses.dylib(lib_color.o) definition of _init_color
/usr/bin/ld: warning multiple definitions of symbol _set_term
term.o definition of _set_term in section (__TEXT,__text)
/sw/lib/libncurses.dylib(lib_set_term.o) definition of _set_term



Also please look in the file config.h created while preparing
> the cvs distribution and tell us whether HAVE_LGAMMA is defined or
> commented out.


HAVE_LGAMMA is defined to be 1, not commented out.

The config output indicates that both "gamma" and "lgamma" are found, but
the log says this:

configure:8466: checking for gamma
configure:8522: gcc -o conftest -g -O2   -I/usr/X11R6/include  conftest.c
>&5
conftest.c:94: warning: conflicting types for built-in function 'gamma'
configure:8528: $? = 0
configure:8535: test -z "$ac_c_werror_flag" || test ! -s conftest.err
configure:8538: $? = 0
configure:8545: test -s conftest
configure:8548: $? = 0
configure:8562: result: yes
configure:8466: checking for lgamma
configure:8522: gcc -o conftest -g -O2   -I/usr/X11R6/include  conftest.c
>&5
conftest.c:95: warning: conflicting types for built-in function 'lgamma'
configure:8528: $? = 0
configure:8535: test -z "$ac_c_werror_flag" || test ! -s conftest.err
configure:8538: $? = 0
configure:8545: test -s conftest
configure:8548: $? = 0
configure:8562: result: yes

In other words, it finds them, but gets some interesting warnings.

- C