Re: strtod bugs

[Eric Blake]

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According to Bruno Haible on 4/1/2008 7:45 PM:
|> Were you planning on backing out the math.in.h changes?
|
| It depends on your vote... If you say no, then no.

Let's leave it in for now: I'm brave enough to make m4 1.4.11 the litmus
test.  If someone complains that strtod.c's use of NAN as provided by
math.in.h breaks compilation of M4, we can revisit the issue and help them
find a workaround.  But my guess (or at least my hope) is that no one will
speak up.

|
| nan.h lives in tests/, since for it to be usable in lib/ one additionally
| needs to use 'inline' or similar.

OK.  Which means math.in.h can't use it.

| Also, it's too tempting to write
|
|    sprintf (buf, "%Le foobar", NAN);
|
| but then the argument being passed is actually a 'double', not a 'long
double'.
| Providing a macro NaNl() avoids this pitfall.

True enough (but no different than the bug of:

sprintf (buf, "%p", 0);

in terms of neglecting to cast a var-arg argument properly).

- --
Don't work too hard, make some time for fun as well!

Eric Blake             address@hidden
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