Le Mon, Apr 05, 2004, à 04:48:44PM +0200, Gansser, Martin a �crit:
> Hi,
>
> I tried to compile dia-0.92.2 on HPUX11.00 with gnome-2.4, but this
> fails with the following error message:
>
> checking math.h usability... yes
> checking math.h presence... yes
> checking for math.h... yes
> checking for isinf in -lm... no
> checking ieeefp.h usability... no
> checking ieeefp.h presence... no
> checking for ieeefp.h... no
> configure: error: Can't find neither a definition of
> isinf nor ieeefp.h
> make: *** [configure-work/main.d/dia-0.92.2/configure] Error 1
Now, this is very strange. We first look for isinf() in math.h with -lm, and
only then we try ieeefp.h (Solaris).
Why does the first test fail?
Hmmm. Can you see if either line solves the problem:
CFLAGS="-g -O2 -Ae" ./configure
CFLAGS="-g -O2 -Aa -D_HPUX_SOURCE" ./configure
?
Also, it would help to see the config.log file, say 40 lines around the word
"isinf"...
D'oh! I see now. On HP-UX, isinf() is a macro. We find it in math.h, so the
first half of the first test "check that isinf exists and is in math.h AND
-lm" succeeds, but then we don't find it in -lm (configure uses a different
code snippet for the second test, which does NOT include math.h; instead, it
defines a bogus prototype and looks for a link failure, which is inevitable
on HP-UX).
Lars, an idea? Shouldn't we be a little more lax with the -lm test? I think
we should test in two steps:
1. isinf() in math.h (if no, go to step 3)
2. isinf in -lm (if yes, add -lm to the command line, if no, don't
put -lm but let it run anyway).
3. isinf() in ieeefp.h (and whatever library Solaris uses to put
the definition of isinf(), if it doesn't use a macro)
-- Cyrille
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