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aa61fd05ca
This patch introduces [llvm] config section with 5 options. Following
patches will use then to config llvm dynamica compiling.
'llvm-utils.[ch]' is introduced in this patch for holding all
llvm/clang related stuffs.
Example:
[llvm]
# Path to clang. If omit, search it from $PATH.
clang-path = "/path/to/clang"
# Cmdline template. Following line shows its default value.
# Environment variable is used to passing options.
#
# *NOTE*: -D__KERNEL__ MUST appears before $CLANG_OPTIONS,
# so user have a chance to use -U__KERNEL__ in $CLANG_OPTIONS
# to cancel it.
clang-bpf-cmd-template = "$CLANG_EXEC -D__KERNEL__ $CLANG_OPTIONS \
$KERNEL_INC_OPTIONS -Wno-unused-value \
-Wno-pointer-sign -working-directory \
$WORKING_DIR -c $CLANG_SOURCE -target \
bpf -O2 -o -"
# Options passed to clang, will be passed to cmdline by
# $CLANG_OPTIONS.
clang-opt = "-Wno-unused-value -Wno-pointer-sign"
# kbuild directory. If not set, use /lib/modules/`uname -r`/build.
# If set to "" deliberately, skip kernel header auto-detector.
kbuild-dir = "/path/to/kernel/build"
# Options passed to 'make' when detecting kernel header options.
kbuild-opts = "ARCH=x86_64"
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: David Ahern <dsahern@gmail.com>
Cc: He Kuang <hekuang@huawei.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kaixu Xia <xiakaixu@huawei.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1437477214-149684-1-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
45 lines
1.2 KiB
C
45 lines
1.2 KiB
C
/*
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* Copyright (C) 2015, Wang Nan <wangnan0@huawei.com>
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* Copyright (C) 2015, Huawei Inc.
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*/
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#include <stdio.h>
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#include "util.h"
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#include "debug.h"
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#include "llvm-utils.h"
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#include "cache.h"
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#define CLANG_BPF_CMD_DEFAULT_TEMPLATE \
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"$CLANG_EXEC -D__KERNEL__ $CLANG_OPTIONS " \
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"$KERNEL_INC_OPTIONS -Wno-unused-value " \
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"-Wno-pointer-sign -working-directory " \
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"$WORKING_DIR -c \"$CLANG_SOURCE\" -target bpf -O2 -o -"
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struct llvm_param llvm_param = {
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.clang_path = "clang",
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.clang_bpf_cmd_template = CLANG_BPF_CMD_DEFAULT_TEMPLATE,
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.clang_opt = NULL,
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.kbuild_dir = NULL,
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.kbuild_opts = NULL,
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};
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int perf_llvm_config(const char *var, const char *value)
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{
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if (prefixcmp(var, "llvm."))
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return 0;
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var += sizeof("llvm.") - 1;
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if (!strcmp(var, "clang-path"))
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llvm_param.clang_path = strdup(value);
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else if (!strcmp(var, "clang-bpf-cmd-template"))
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llvm_param.clang_bpf_cmd_template = strdup(value);
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else if (!strcmp(var, "clang-opt"))
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llvm_param.clang_opt = strdup(value);
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else if (!strcmp(var, "kbuild-dir"))
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llvm_param.kbuild_dir = strdup(value);
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else if (!strcmp(var, "kbuild-opts"))
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llvm_param.kbuild_opts = strdup(value);
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else
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return -1;
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return 0;
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}
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