Problems on Solaris after this patch, too. At least in the compilation
mode I've been using, isinf is not found by autoconf (though isnan is). So
we come into this section of macros.h with HAVE_ISNAN defined, but not
HAVE_ISINF. Since they're both supposed to be macros in math.h, changing
ifndef HAVE_ISINF
to
if !defined(HAVE_ISINF) && !defined(isinf)
causes the compile to succeed for me, and the testsuite passes as well.
I've done the same thing for isnan, since it's also supposed to be a macro.
I've attached the patch I used.
I'll note that the info page on autoconf talks about isnan and isinf a bit,
and has a suggestion for how to deal with them. I know there's been a
bunch of back-and-forth on this here, but I don't think anyone's raised
that source specifically.
Thanks,
Danek
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diff --git src/macros.h src/macros.h
index b86c479..8d287bd 100644
--- src/macros.h
+++ src/macros.h
@@ -334,10 +334,10 @@
# define isinf(x) (!_finite(x) && !_isnan(x))
# endif
# else
-# ifndef HAVE_ISNAN
+# if !defined(HAVE_ISNAN) && !defined(isnan)
static inline int isnan(double x) { return x != x; }
# endif
-# ifndef HAVE_ISINF
+# if !defined(HAVE_ISINF) && !defined(isinf)
static inline int isinf(double x) { return !isnan(x) && isnan(x - x); }
# endif
# endif
