[PATCH v1 34/35] Assume __has_attribute(__alloc_size__)

[Alejandro Colomar]

We already assume that GCC is at least GCC 5,
and we also assume that Clang is at least Clang 4.

Clang added support for __attribute__((__alloc_size__())) in
Clang 4.0.0:

llvm.git a747027bc645 (2016-12-20; "Add the alloc_size attribute to clang.")

	$ git describe --contains a747027bc645
	llvmorg-4.0.0-rc1~1659

Signed-off-by: Alejandro Colomar <alx@kernel.org>
---
 misc/sys/cdefs.h | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/misc/sys/cdefs.h b/misc/sys/cdefs.h
index 07eddbef74..76ee6c275e 100644
--- a/misc/sys/cdefs.h
+++ b/misc/sys/cdefs.h
@@ -382,12 +382,8 @@
 
 /* Tell the compiler which arguments to an allocation function
    indicate the size of the allocation.  */
-#if __GNUC_PREREQ (4, 3)
 # define __attribute_alloc_size__(params) \
   __attribute__ ((__alloc_size__ params))
-#else
-# define __attribute_alloc_size__(params) /* Ignore.  */
-#endif
 
 /* Tell the compiler which argument to an allocation function
    indicates the alignment of the allocation.  */
-- 
2.51.0