1/*
2 * Copyright (C) 2015, Wang Nan <wangnan0@huawei.com>
3 * Copyright (C) 2015, Huawei Inc.
4 */
5#ifndef __LLVM_UTILS_H
6#define __LLVM_UTILS_H
7
8#include "debug.h"
9
10struct llvm_param {
11	/* Path of clang executable */
12	const char *clang_path;
13	/*
14	 * Template of clang bpf compiling. 5 env variables
15	 * can be used:
16	 *   $CLANG_EXEC:		Path to clang.
17	 *   $CLANG_OPTIONS:		Extra options to clang.
18	 *   $KERNEL_INC_OPTIONS:	Kernel include directories.
19	 *   $WORKING_DIR:		Kernel source directory.
20	 *   $CLANG_SOURCE:		Source file to be compiled.
21	 */
22	const char *clang_bpf_cmd_template;
23	/* Will be filled in $CLANG_OPTIONS */
24	const char *clang_opt;
25	/* Where to find kbuild system */
26	const char *kbuild_dir;
27	/*
28	 * Arguments passed to make, like 'ARCH=arm' if doing cross
29	 * compiling. Should not be used for dynamic compiling.
30	 */
31	const char *kbuild_opts;
32	/*
33	 * Default is false. If one of the above fields is set by user
34	 * explicitly then user_set_llvm is set to true. This is used
35	 * for perf test. If user doesn't set anything in .perfconfig
36	 * and clang is not found, don't trigger llvm test.
37	 */
38	bool user_set_param;
39};
40
41extern struct llvm_param llvm_param;
42extern int perf_llvm_config(const char *var, const char *value);
43
44extern int llvm__compile_bpf(const char *path, void **p_obj_buf,
45			     size_t *p_obj_buf_sz);
46
47/* This function is for test__llvm() use only */
48extern int llvm__search_clang(void);
49#endif
50