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Commit 565cbdc2 authored by Mark Charlebois's avatar Mark Charlebois Committed by Behan Webster
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LLVMLinux: Add support for clang to compiler.h and new compiler-clang.h 



Add a compiler-clang.h file to add specific macros needed for compiling the
kernel with clang.

Initially the only override required is the macro for silencing the
compiler for a purposefully uninintialized variable.

Author: Mark Charlebois <charlebm@gmail.com>
Signed-off-by: default avatarMark Charlebois <charlebm@gmail.com>
Signed-off-by: default avatarBehan Webster <behanw@converseincode.com>
parent aa93685a

include/linux/compiler-clang.h

0 → 100644
+12 −0
Original line number Diff line number Diff line 
#ifndef __LINUX_COMPILER_H

#error "Please don't include <linux/compiler-clang.h> directly, include <linux/compiler.h> instead."

#endif



/* Some compiler specific definitions are overwritten here

 * for Clang compiler

 */



#ifdef uninitialized_var

#undef uninitialized_var

#define uninitialized_var(x) x = *(&(x))

#endif

include/linux/compiler.h

+7 −0
Original line number Diff line number Diff line
@@ -63,6 +63,13 @@ extern void __chk_io_ptr(const volatile void __iomem *); 
# include <linux/compiler-intel.h>

#endif



/* Clang compiler defines __GNUC__. So we will overwrite implementations

 * coming from above header files here

 */

#ifdef __clang__

#include <linux/compiler-clang.h>

#endif



/*

 * Generic compiler-dependent macros required for kernel

 * build go below this comment. Actual compiler/compiler version