Created attachment 249658 [details] [review]
proposed patch

This test fails on illumos (aka opensolaris) libc:

glib test (glib/tests/gvariant.c)

3728   /* inf/nan mini test */
3729   {
3730     const gchar *tests[] = { "inf", "-inf", "nan" };
3731     GVariant *value;
3732     gchar *printed;
3733     gint i;
3734
3735     for (i = 0; i < G_N_ELEMENTS (tests); i++)
3736       {
3737         GError *error = NULL;
3738         value = g_variant_parse (NULL, tests[i], NULL, NULL,
&error);
3739         printed = g_variant_print (value, FALSE);
3740         g_assert (g_str_has_prefix (printed, tests[i]));
3741         g_free (printed);
3742         g_variant_unref (value);
3743       }
3744   }

Because libc give mixed-case strings. Here is a test program:
#include <stdlib.h>
#include <stdio.h>
#include <math.h>

#ifndef NAN
#define NAN (atof ("NaN"))
#endif

#ifndef INFINITY
#define INFINITY (atof("Infinity"))
#endif

int main()
{
    double inf = INFINITY;
    double minf = -INFINITY;
    double nan = NAN;
    printf("\"%f\", \"%f\", \"%f\"\n", inf, minf, nan);
    return EXIT_SUCCESS;
}


On linux (glibc):
# ./a.out 
"inf", "-inf", "nan"

On illumos:
$ ./a.out 
"Inf", "-Inf", "NaN"