The clang bpf cmdline template has defined default value in the file
tools/perf/util/llvm-utils.c, which has been changed for several times.
This patch updates the documentation to reflect the latest default value
for the configuration llvm.clang-bpf-cmd-template.
Fixes: d35b168c3dcd ("perf bpf: Give precedence to bpf header dir")
Fixes: cb76371441d0 ("perf llvm: Allow passing options to llc in addition to clang")
Fixes: 1b16fffa389d ("perf llvm-utils: Add bpf include path to clang command line")
Signed-off-by: Leo Yan <leo.yan@xxxxxxxxxx>
---
tools/perf/Documentation/perf-config.txt | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/tools/perf/Documentation/perf-config.txt b/tools/perf/Documentation/perf-config.txt
index 462b3cde0675..e4aa268d2e38 100644
--- a/tools/perf/Documentation/perf-config.txt
+++ b/tools/perf/Documentation/perf-config.txt
@@ -564,9 +564,12 @@ llvm.*::
llvm.clang-bpf-cmd-template::
Cmdline template. Below lines show its default value. Environment
variable is used to pass options.
- "$CLANG_EXEC -D__KERNEL__ $CLANG_OPTIONS $KERNEL_INC_OPTIONS \
- -Wno-unused-value -Wno-pointer-sign -working-directory \
- $WORKING_DIR -c $CLANG_SOURCE -target bpf -O2 -o -"
+ "$CLANG_EXEC -D__KERNEL__ -D__NR_CPUS__=$NR_CPUS "\
+ "-DLINUX_VERSION_CODE=$LINUX_VERSION_CODE " \
+ "$CLANG_OPTIONS $PERF_BPF_INC_OPTIONS $KERNEL_INC_OPTIONS " \
+ "-Wno-unused-value -Wno-pointer-sign " \
+ "-working-directory $WORKING_DIR " \
+ "-c \"$CLANG_SOURCE\" -target bpf $CLANG_EMIT_LLVM -O2 -o - $LLVM_OPTIONS_PIPE"
llvm.clang-opt::
Options passed to clang.
--
2.17.1
