Problems with <tgmath.h>
Daniel Jacobowitz
drow@false.org
Tue Dec 14 15:35:00 GMT 1999
(Actually also with <bits/mathdef.h> and <math.h>)
I ran in to two problems today. The first is that if both <math.h> and
<complex.h> are included, the multiple inclusion of <bits/mathdef.h>
causes float_t and double_t to get typedef'd twice, producing a
warning.
More troublesome: <tgmath.h> generates calls to func, funcf, and funcl
for each math function, but without __USE_MISC || __USE_ISOC9X, funcf
does not get defined. Also, funcl does not get defined if
-D__NO_LONG_DOUBLE_MATH, which is always set on powerpc, at least.
This produces wrong output from calling trunc() on a float without
__USE_MISC || __USE_ISOC9X, because the float is converted incorrectly.
Dan
/--------------------------------\ /--------------------------------\
| Daniel Jacobowitz |__| SCS Class of 2002 |
| Debian GNU/Linux Developer __ Carnegie Mellon University |
| dan@debian.org | | dmj+@andrew.cmu.edu |
\--------------------------------/ \--------------------------------/
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