LLVMLinux: Add support for clang to compiler.h and new compiler-clang.h (565cbdc2) · Commits · 戴 / test

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:

Mark Charlebois <charlebm@gmail.com> Signed-off-by:

Behan Webster <behanw@converseincode.com>

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

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