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-rw-r--r--tools/perf/Makefile.perf3
1 files changed, 3 insertions, 0 deletions
diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index e3a34af38130..86dbb51bb272 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -121,6 +121,9 @@ include ../scripts/utilities.mak
# Define NO_SYSCALL_TABLE=1 to disable the use of syscall id to/from name tables
# generated from the kernel .tbl or unistd.h files and use, if available, libaudit
# for doing the conversions to/from strings/id.
+#
+# Define LIBPFM4 to enable libpfm4 events extension.
+#
# As per kernel Makefile, avoid funny character set dependencies
unexport LC_ALL