From 3e84239ff64ececa6bd54bbddbc9e3d22542dfa9 Mon Sep 17 00:00:00 2001
From: Vladimir Kobal <vlad@prokk.net>
Date: Thu, 16 Jul 2020 15:10:35 +0300
Subject: Use the libbpf library for the eBPF plugin (#9490)

---
 CMakeLists.txt | 33 ++++++++++++++++++++++++++++++---
 1 file changed, 30 insertions(+), 3 deletions(-)

(limited to 'CMakeLists.txt')

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 30e222603a..427027e19f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -299,6 +299,30 @@ find_package(libmongoc-1.0)
 # ${MONGOC_INCLUDE_DIRS}
 
 
+# -----------------------------------------------------------------------------
+# Detect libbpf
+IF(LINUX AND EXISTS "${CMAKE_SOURCE_DIR}/externaldeps/libbpf/libbpf.a")
+    message(STATUS "libbpf library found")
+    pkg_check_modules(ELF REQUIRED libelf)
+    # later we use:
+    # ${ELF_LIBRARIES}
+    # ${ELF_CFLAGS_OTHER}
+    # ${ELF_INCLUDE_DIRS}
+    IF(ELF_LIBRARIES)
+        list(APPEND NETDATA_COMMON_CFLAGS ${ELF_CFLAGS_OTHER})
+        list(INSERT NETDATA_COMMON_LIBRARIES 0
+            ${CMAKE_SOURCE_DIR}/externaldeps/libbpf/libbpf.a
+            ${ELF_LIBRARIES})
+        list(APPEND NETDATA_COMMON_INCLUDE_DIRS ${ELF_INCLUDE_DIRS})
+        include_directories(BEFORE ${CMAKE_SOURCE_DIR}/externaldeps/libbpf/include)
+        set(ENABLE_PLUGIN_EBPF True)
+    ELSE(ELF_LIBRARIES)
+        set(ENABLE_PLUGIN_EBPF False)
+        message(STATUS "ebpf plugin: disabled (requires libelf)")
+    ENDIF(ELF_LIBRARIES)
+ENDIF()
+
+
 # -----------------------------------------------------------------------------
 # netdata files
 
@@ -315,8 +339,6 @@ set(LIBNETDATA_FILES
         libnetdata/clocks/clocks.h
         libnetdata/dictionary/dictionary.c
         libnetdata/dictionary/dictionary.h
-        libnetdata/ebpf/ebpf.c
-        libnetdata/ebpf/ebpf.h
         libnetdata/eval/eval.c
         libnetdata/eval/eval.h
         libnetdata/inlined.h
@@ -357,6 +379,12 @@ set(LIBNETDATA_FILES
         libnetdata/circular_buffer/circular_buffer.c
         libnetdata/circular_buffer/circular_buffer.h)
 
+IF(ENABLE_PLUGIN_EBPF)
+    list(APPEND LIBNETDATA_FILES
+        libnetdata/ebpf/ebpf.c
+        libnetdata/ebpf/ebpf.h)
+ENDIF()
+
 add_library(libnetdata OBJECT ${LIBNETDATA_FILES})
 
 set(APPS_PLUGIN_FILES
@@ -928,7 +956,6 @@ IF(LINUX)
     SET(ENABLE_PLUGIN_APPS True)
     SET(ENABLE_PLUGIN_PERF True)
     SET(ENABLE_PLUGIN_SLABINFO True)
-    SET(ENABLE_PLUGIN_EBPF True)
 
 ELSEIF(FREEBSD)
     add_executable(netdata config.h ${NETDATA_FILES} ${FREEBSD_PLUGIN_FILES})
-- 
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