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From: "Yordan Karadzhov (VMware)" <y.karadz@gmail.com>
To: rostedt@goodmis.org
Cc: linux-trace-devel@vger.kernel.org,
	"Yordan Karadzhov (VMware)" <y.karadz@gmail.com>
Subject: [PATCH v8 08/44] kernel-shark: Define build target for JSONC
Date: Mon,  4 Jan 2021 19:46:48 +0200
Message-ID: <20210104174724.70404-9-y.karadz@gmail.com> (raw)
In-Reply-To: <20210104174724.70404-1-y.karadz@gmail.com>

Having the JSONC libs as a target simplifies the build/linking of
the KernelShark libraries and executables because all necessary
information, like include paths, compiler flags and library names
can be retriever directly from the target.

The patch also adds to FindJSONC.cmake the standard module
documentation header.

Signed-off-by: Yordan Karadzhov (VMware) <y.karadz@gmail.com>
---
 CMakeLists.txt        |  3 +-
 build/FindJSONC.cmake | 70 +++++++++++++++++++++++++++++++++----------
 src/CMakeLists.txt    |  2 +-
 3 files changed, 57 insertions(+), 18 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2e970c3..f21d734 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -41,7 +41,7 @@ find_package(TraceEvent REQUIRED)
 find_package(TraceFS    REQUIRED)
 find_package(TraceCmd   REQUIRED)
 
-include(${KS_DIR}/build/FindJSONC.cmake)
+find_package(JSONC      REQUIRED)
 
 find_package(Doxygen)
 
@@ -99,7 +99,6 @@ endif (CMAKE_BUILD_TYPE MATCHES Package)
 
 include_directories(${KS_DIR}/src/
                     ${KS_DIR}/build/src/
-                    ${JSONC_INCLUDE_DIR}
                     ${TRACECMD_INCLUDE_DIR})
 
 message("")
diff --git a/build/FindJSONC.cmake b/build/FindJSONC.cmake
index 3bae20f..2d0d41f 100644
--- a/build/FindJSONC.cmake
+++ b/build/FindJSONC.cmake
@@ -1,13 +1,44 @@
-# - Try to find json-c
-# https://cmake.org/Wiki/CMake:How_To_Find_Libraries
-# Once done this will define
-#  JSONC_FOUND - System has json-c
-#  JSONC_INCLUDE_DIRS - The json-c include directories
-#  JSONC_LIBRARIES - The libraries needed to use json-c
-#  JSONC_DEFINITIONS - Compiler switches required for using json-c
-
-find_package(PkgConfig)
+
+#[=======================================================================[.rst:
+FindJSONC
+-------
+
+Finds the traceevent library.
+
+Imported Targets
+^^^^^^^^^^^^^^^^
+
+This module defines the :prop_tgt:`IMPORTED` targets:
+
+``jsonc::jsonc``
+ Defined if the system has json-c.
+
+Result Variables
+^^^^^^^^^^^^^^^^
+
+``JSONC_FOUND``
+  True if the system has the json-c library.
+``JSONC_VERSION``
+  The version of the json-c library which was found.
+``JSONC_INCLUDE_DIRS``
+  Include directories needed to use json-c.
+``JSONC_LIBRARIES``
+  Libraries needed to link to json-c.
+
+Cache Variables
+^^^^^^^^^^^^^^^
+
+``JSONC_INCLUDE_DIR``
+  The directory containing ``json.h``.
+``JSONC_LIBRARY``
+  The path to the traceevent library.
+
+#]=======================================================================]
+
+find_package(PkgConfig QUIET)
 pkg_check_modules(PC_JSONC QUIET json-c)
+
+set(JSONC_VERSION     ${PC_JSONC_VERSION})
 set(JSONC_DEFINITIONS ${PC_JSONC_CFLAGS_OTHER})
 
 find_path(JSONC_INCLUDE_DIR json.h
@@ -20,19 +51,28 @@ find_library(JSONC_LIBRARY NAMES json-c libjson-c
 find_library(JSONC_LIBRARY NAMES json-c libjson-c
              HINTS ${PC_JSON-C_LIBDIR} ${PC_JSON-C_LIBRARY_DIRS})
 
+mark_as_advanced(JSONC_INCLUDE_DIR JSONC_LIBRARY)
+
 include(FindPackageHandleStandardArgs)
 # handle the QUIETLY and REQUIRED arguments and set JSONC_FOUND to TRUE
 # if all listed variables are TRUE
 find_package_handle_standard_args(JSONC DEFAULT_MSG
                                   JSONC_LIBRARY JSONC_INCLUDE_DIR)
 
-if (NOT JSONC_FOUND)
+if(JSONC_FOUND)
 
-  message(FATAL_ERROR "Json-C is Required!\n")
+  set(JSONC_LIBRARIES    ${JSONC_LIBRARY})
+  set(JSONC_INCLUDE_DIRS ${JSONC_INCLUDE_DIR})
 
-endif (NOT JSONC_FOUND)
+  if(NOT TARGET jsonc::jsonc)
+    add_library(jsonc::jsonc UNKNOWN IMPORTED)
 
-mark_as_advanced(JSONC_INCLUDE_DIR JSONC_LIBRARY)
+    set_target_properties(jsonc::jsonc
+                          PROPERTIES
+                            INTERFACE_INCLUDE_DIRECTORIES "${JSONC_INCLUDE_DIRS}"
+                            INTERFACE_COMPILE_DEFINITIONS "${JSONC_DEFINITIONS}"
+                            IMPORTED_LINK_INTERFACE_LANGUAGES "C"
+                            IMPORTED_LOCATION "${JSONC_LIBRARIES}")
+  endif()
 
-set(JSONC_LIBRARIES    ${JSONC_LIBRARY})
-set(JSONC_INCLUDE_DIRS ${JSONC_INCLUDE_DIR})
+endif()
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index d51e5ee..ecd448c 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -12,7 +12,7 @@ add_library(kshark SHARED libkshark.c
 target_link_libraries(kshark trace::cmd
                              trace::fs
                              trace::event
-                             ${JSONC_LIBRARY}
+                             jsonc::jsonc
                              ${CMAKE_DL_LIBS})
 
 set_target_properties(kshark  PROPERTIES
-- 
2.25.1


  parent reply index

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-04 17:46 [PATCH v8 00/44] Start KernelShark v2 transformation Yordan Karadzhov (VMware)
2021-01-04 17:46 ` [PATCH v8 01/44] kernel-shark: Adopt trace-cmd API changes Yordan Karadzhov (VMware)
2021-01-04 17:46 ` [PATCH v8 02/44] kernel-shark: Use libtraceevent and libtracefs Yordan Karadzhov (VMware)
2021-01-04 17:46 ` [PATCH v8 03/44] kernel-shark: Add license information Yordan Karadzhov (VMware)
2021-01-04 17:46 ` [PATCH v8 04/44] kernel-shark: Change the CMake minimum version required Yordan Karadzhov (VMware)
2021-01-04 17:46 ` [PATCH v8 05/44] kernel-shark: Change default libraries install location Yordan Karadzhov (VMware)
2021-01-04 17:46 ` [PATCH v8 06/44] kernel-shark: Split the installation in two components Yordan Karadzhov (VMware)
2021-01-04 17:46 ` [PATCH v8 07/44] kernel-shark: Update README Yordan Karadzhov (VMware)
2021-01-04 17:46 ` Yordan Karadzhov (VMware) [this message]
2021-01-04 17:46 ` [PATCH v8 09/44] kernel-shark: Use only signed types in kshark_entry Yordan Karadzhov (VMware)
2021-01-04 17:46 ` [PATCH v8 10/44] kernel-shark: Add stream_id to kshark_entry Yordan Karadzhov (VMware)
2021-01-04 17:46 ` [PATCH v8 11/44] kernel-shark: Introduce libkshark-hash Yordan Karadzhov (VMware)
2021-01-04 17:46 ` [PATCH v8 12/44] kernel-shark: Introduce Data streams Yordan Karadzhov (VMware)
2021-01-04 17:46 ` [PATCH v8 13/44] kernel-shark: Rename static methods in libkshark Yordan Karadzhov (VMware)
2021-01-04 17:46 ` [PATCH v8 14/44] kernel-shark: Add basic methods for Data streams Yordan Karadzhov (VMware)
2021-01-04 17:46 ` [PATCH v8 15/44] kernel-shark: Housekeeping before implementing stream interface Yordan Karadzhov (VMware)
2021-01-04 17:46 ` [PATCH v8 16/44] kernel-shark: Add stream interface for trace-cmd data Yordan Karadzhov (VMware)
2021-01-04 17:46 ` [PATCH v8 17/44] kernel-shark: Start introducing KernelShark 2.0 Yordan Karadzhov (VMware)
2021-01-04 17:46 ` [PATCH v8 18/44] kernel-shark: Start using data streams Yordan Karadzhov (VMware)
2021-01-04 17:46 ` [PATCH v8 19/44] kernel-shark: Remove dead code Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 20/44] kernel-shark: Redesign the plugin interface Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 21/44] kernel-shark: Complete the stream integration Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 22/44] kernel-shark: Provide merging of multiple data streams Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 23/44] kernel-shark: Integrate the stream definitions with data model Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 24/44] kernel-shark: Use only signed types for model defs Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 25/44] kernel-shark: Add ksmodel_get_bin() Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 26/44] kernel-shark: Protect ksmodel_set_in_range_bining() Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 27/44] kernel-shark: Add methods for time calibration Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 28/44] kernel-shark: Integrate streams with libkshark-configio Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 29/44] kernel-shark: Add support for drawing text Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 30/44] kernel-shark: Make GLUT optional dependency Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 31/44] kernel-shark: Add ksplot_draw_polyline() Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 32/44] kernel-shark: Optimize ksplot_draw_polygon() Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 33/44] kernel-shark: Add basic infrastructure for testing Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 34/44] kernel-shark: Add "github Actions" workflow Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 35/44] kernel-shark: Integrate streams with KsPlotTools Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 36/44] kernel-shark: Add getStreamColorTable() Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 37/44] kernel-shark: Redefine the args of KsPlot::getColor() Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 38/44] kernel-shark: Add TextBox class to KsPlot namespace Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 39/44] kernel-shark: Consistent method naming in KsPlotTools Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 40/44] kernel-shark: Make the label part of the graph Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 41/44] kernel-shark: Remove the hard-coded Idle PID Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 42/44] kernel-shark: Add class Polyline to KsPlot namespace Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 43/44] kernel-shark: Add VirtBridge and VirtGap classes Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 44/44] kernel-shark: Add double click interface to PlotObject Yordan Karadzhov (VMware)
2021-01-05  0:27 ` [PATCH v8 00/44] Start KernelShark v2 transformation Steven Rostedt

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