Commit 565cbdc2fec92ef2ae75995e06e69172ed2edecd
Committed by
Behan Webster
Behan Webster
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aa93685afb
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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: Mark Charlebois <charlebm@gmail.com> Signed-off-by: Behan Webster <behanw@converseincode.com>
Showing 2 changed files with 19 additions and 0 deletions Side-by-side Diff
include/linux/compiler-clang.h
| 1 | +#ifndef __LINUX_COMPILER_H | |
| 2 | +#error "Please don't include <linux/compiler-clang.h> directly, include <linux/compiler.h> instead." | |
| 3 | +#endif | |
| 4 | + | |
| 5 | +/* Some compiler specific definitions are overwritten here | |
| 6 | + * for Clang compiler | |
| 7 | + */ | |
| 8 | + | |
| 9 | +#ifdef uninitialized_var | |
| 10 | +#undef uninitialized_var | |
| 11 | +#define uninitialized_var(x) x = *(&(x)) | |
| 12 | +#endif |
include/linux/compiler.h
| ... | ... | @@ -63,6 +63,13 @@ |
| 63 | 63 | # include <linux/compiler-intel.h> |
| 64 | 64 | #endif |
| 65 | 65 | |
| 66 | +/* Clang compiler defines __GNUC__. So we will overwrite implementations | |
| 67 | + * coming from above header files here | |
| 68 | + */ | |
| 69 | +#ifdef __clang__ | |
| 70 | +#include <linux/compiler-clang.h> | |
| 71 | +#endif | |
| 72 | + | |
| 66 | 73 | /* |
| 67 | 74 | * Generic compiler-dependent macros required for kernel |
| 68 | 75 | * build go below this comment. Actual compiler/compiler version |