diff options
Diffstat (limited to 'doc/posix-headers/assert.texi')
| -rw-r--r-- | doc/posix-headers/assert.texi | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/doc/posix-headers/assert.texi b/doc/posix-headers/assert.texi index 02a1c3b547..aa78ee7bc5 100644 --- a/doc/posix-headers/assert.texi +++ b/doc/posix-headers/assert.texi @@ -3,12 +3,31 @@ POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/basedefs/assert.h.html} -Gnulib module: --- +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 |