26_numerics/c99_classification_macros_c.cc

[Gabriel Dos Reis]

Zack Weinberg <zack@codesourcery.com> writes:

[...]

| Why is the test failing in the first place?  I confess I don't
| understand what it is trying to test.

C99 introduced bunch of functional macros that should not exist in
C++ headers -- i.e. fpclassify and all that.

The thing is that depending on the C library something like 

  #include <cmath>

will drag in those macros.  The test should fail if they exist.

-- Gaby