[for-next][PATCH 1/6] tools/build: Add libcpupower dependency detection

[Steven Rostedt <rostedt@goodmis.org>]

From: Tomas Glozar <tglozar@redhat.com>

Add the ability to detect the presence of libcpupower on a system to
the Makefiles in tools/build.

Link: https://lore.kernel.org/20241017140914.3200454-2-tglozar@redhat.com
Signed-off-by: Tomas Glozar <tglozar@redhat.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
---
 tools/build/Makefile.feature           | 1 +
 tools/build/feature/Makefile           | 4 ++++
 tools/build/feature/test-libcpupower.c | 8 ++++++++
 3 files changed, 13 insertions(+)
 create mode 100644 tools/build/feature/test-libcpupower.c

diff --git a/tools/build/Makefile.feature b/tools/build/Makefile.feature
index ffd117135094..2ebfb826dcea 100644
--- a/tools/build/Makefile.feature
+++ b/tools/build/Makefile.feature
@@ -53,6 +53,7 @@ FEATURE_TESTS_BASIC :=                  \
         libslang-include-subdir         \
         libtraceevent                   \
         libtracefs                      \
+        libcpupower                     \
         libcrypto                       \
         libunwind                       \
         pthread-attr-setaffinity-np     \
diff --git a/tools/build/feature/Makefile b/tools/build/feature/Makefile
index 5938cf799dc6..6ef3e1ca583e 100644
--- a/tools/build/feature/Makefile
+++ b/tools/build/feature/Makefile
@@ -38,6 +38,7 @@ FILES=                                          \
          test-libslang.bin                      \
          test-libslang-include-subdir.bin       \
          test-libtraceevent.bin                 \
+         test-libcpupower.bin                   \
          test-libtracefs.bin                    \
          test-libcrypto.bin                     \
          test-libunwind.bin                     \
@@ -245,6 +246,9 @@ $(OUTPUT)test-libslang-include-subdir.bin:
 $(OUTPUT)test-libtraceevent.bin:
 	$(BUILD) -ltraceevent
 
+$(OUTPUT)test-libcpupower.bin:
+	$(BUILD) -lcpupower
+
 $(OUTPUT)test-libtracefs.bin:
 	 $(BUILD) $(shell $(PKG_CONFIG) --cflags libtracefs 2>/dev/null) -ltracefs
 
diff --git a/tools/build/feature/test-libcpupower.c b/tools/build/feature/test-libcpupower.c
new file mode 100644
index 000000000000..a346aa332a71
--- /dev/null
+++ b/tools/build/feature/test-libcpupower.c
@@ -0,0 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <cpuidle.h>
+
+int main(void)
+{
+	int rv = cpuidle_state_count(0);
+	return rv;
+}
-- 
2.45.2