On Thu, Aug 29, 2013 at 4:49 AM, Thomas Petazzoni
[off-list ref] wrote:

Dear Lucas De Marchi,

On Thu, 29 Aug 2013 00:55:04 -0300, Lucas De Marchi wrote:

quoted

Hi Thomas,

On Wed, Aug 28, 2013 at 12:33 PM, Thomas Petazzoni
[off-list ref] wrote:

quoted

Commit 8efede20ef ("Use _Static_assert") introduced the usage of
_Static_assert(). However, _Static_assert() is a fairly new thing,
since it was introduced only in gcc 4.6. In order to support older

What distro is still in gcc 4.6? Is it a LTS one?

It's not a distro. As you know, I work on the Buildroot project, a tool
that builds rootfs for embedded Linux systems using cross-compilation.
One of the package we have is obviously kmod, but since we support a
wide range of architectures, not all of them are necessarily fully
up-to-date in terms of compiler version. The specific example that
raised the problem is a gcc 4.5.x toolchain for PowerPC provided by
Mentor Graphics Sourcery CodeBench (formerly known as CodeSourcery).

quoted

quoted

+#if defined(HAVE_STATIC_ASSERT)
 #define assert_cc(expr) \
        _Static_assert((expr), #expr)
+#else
+#define assert_cc(expr)

could you then define it similarly to what it was before then in this #else?

I think this would do it (totally untested) with the downside of an
ugly build error.

#define assert_cc(expr) \
       do { (void) sizeof(char [1 - 2*!(expr)]); } while(0)

Sure, will fix this and resend.

Ping.

Lucas De Marchi