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@node assert.h
@section @file{assert.h}
POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/basedefs/assert.h.html}
Gnulib module: assert-h
See also the Gnulib module @code{assert}.
Portability problems fixed by Gnulib:
@itemize
@item
The draft C1X and C++0X @code{static_assert}, and the draft C1X
@code{_Static_assert}, are not supported by many platforms.
For example, GCC versions before 4.6.0 do not support @code{_Static_assert},
and G++ versions through at least 4.6.0 do not support @code{static_assert}.
@end itemize
Portability problems not fixed by Gnulib:
@itemize
@item
Draft C1X @code{_Static_assert} and draft C++0X @code{static_assert}
are keywords that can be used without including @code{<assert.h>}.
The Gnulib substitutes are macros that require including @code{<assert.h>}.
@item
The draft C1X @code{static_assert} and @code{_Static_assert} can also
be used within a @code{struct} or @code{union} specifier, in place of
an ordinary declaration of a member of the struct or union. The
Gnulib substitute can be used only as an ordinary declaration.
@item
In C99, @code{assert} can be applied to any scalar expression.
In C89, the argument to @code{assert} is of type @code{int}.
@end itemize
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