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| author | Song Liu <songliubraving@fb.com> | 2020-03-12 11:23:30 -0700 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2020-03-13 00:08:33 +0100 |
| commit | 14e5728ff8176d4d5924b0bf5ab9b1c94d6b3381 (patch) | |
| tree | 96fd81f008024bf24e32bd4633822a7eef9e9571 /tools/build | |
| parent | fe4eb069edb7ab845160350d9e67d572c026a4a7 (diff) | |
| download | linux-14e5728ff8176d4d5924b0bf5ab9b1c94d6b3381.tar.gz | |
bpftool: Only build bpftool-prog-profile if supported by clang
bpftool-prog-profile requires clang to generate BTF for global variables.
When compared with older clang, skip this command. This is achieved by
adding a new feature, clang-bpf-global-var, to tools/build/feature.
Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Quentin Monnet <quentin@isovalent.com>
Link: https://lore.kernel.org/bpf/20200312182332.3953408-2-songliubraving@fb.com
Diffstat (limited to 'tools/build')
| -rw-r--r-- | tools/build/feature/Makefile | 9 | ||||
| -rw-r--r-- | tools/build/feature/test-clang-bpf-global-var.c | 4 |
2 files changed, 12 insertions, 1 deletions
diff --git a/tools/build/feature/Makefile b/tools/build/feature/Makefile index 7ac0d8088565b..ab8e89a7009c7 100644 --- a/tools/build/feature/Makefile +++ b/tools/build/feature/Makefile @@ -67,7 +67,8 @@ FILES= \ test-llvm.bin \ test-llvm-version.bin \ test-libaio.bin \ - test-libzstd.bin + test-libzstd.bin \ + test-clang-bpf-global-var.bin FILES := $(addprefix $(OUTPUT),$(FILES)) @@ -75,6 +76,7 @@ CC ?= $(CROSS_COMPILE)gcc CXX ?= $(CROSS_COMPILE)g++ PKG_CONFIG ?= $(CROSS_COMPILE)pkg-config LLVM_CONFIG ?= llvm-config +CLANG ?= clang all: $(FILES) @@ -321,6 +323,11 @@ $(OUTPUT)test-libaio.bin: $(OUTPUT)test-libzstd.bin: $(BUILD) -lzstd +$(OUTPUT)test-clang-bpf-global-var.bin: + $(CLANG) -S -g -target bpf -o - $(patsubst %.bin,%.c,$(@F)) | \ + grep BTF_KIND_VAR + + ############################### clean: diff --git a/tools/build/feature/test-clang-bpf-global-var.c b/tools/build/feature/test-clang-bpf-global-var.c new file mode 100644 index 0000000000000..221f1481d52e1 --- /dev/null +++ b/tools/build/feature/test-clang-bpf-global-var.c @@ -0,0 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2020 Facebook + +volatile int global_value_for_test = 1; |