diff options
| author | Mark Charlebois | 2012-11-20 22:13:10 +0100 |
|---|---|---|
| committer | Behan Webster | 2014-04-09 13:44:35 -0700 |
| commit | 565cbdc2fec92ef2ae75995e06e69172ed2edecd (patch) | |
| tree | 5f28a812a1ec430e87827cabd654b8429527bb36 | |
| parent | aa93685afbefa0e31af3a0a03ff97b37ee92a90b (diff) | |
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: Mark Charlebois <charlebm@gmail.com>
Signed-off-by: Behan Webster <behanw@converseincode.com>
| -rw-r--r-- | include/linux/compiler-clang.h | 12 | ||||
| -rw-r--r-- | include/linux/compiler.h | 7 |
2 files changed, 19 insertions, 0 deletions
diff --git a/include/linux/compiler-clang.h b/include/linux/compiler-clang.h new file mode 100644 index 000000000000..d1e49d52b640 --- /dev/null +++ b/include/linux/compiler-clang.h @@ -0,0 +1,12 @@ +#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 diff --git a/include/linux/compiler.h b/include/linux/compiler.h index 2472740d7ab2..ee7239ea1583 100644 --- a/include/linux/compiler.h +++ b/include/linux/compiler.h @@ -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 |