new(build): add options to use bundled yamlcpp and njson

Signed-off-by: Gianmatteo Palmieri <mail@gian.im>

cmake/modules/cpp-httplib.cmake

@@ -32,6 +32,8 @@ else()
     set(CPPHTTPLIB_SRC "${PROJECT_BINARY_DIR}/cpp-httplib-prefix/src/cpp-httplib")
     set(CPPHTTPLIB_INCLUDE "${CPPHTTPLIB_SRC}")
 
+    message(STATUS "Using bundled cpp-httplib in ${CPPHTTPLIB_SRC}")
+
     ExternalProject_Add(cpp-httplib
         PREFIX "${PROJECT_BINARY_DIR}/cpp-httplib-prefix"
         URL "https://github.com/yhirose/cpp-httplib/archive/refs/tags/v0.13.1.tar.gz"

cmake/modules/cxxopts.cmake

@@ -44,5 +44,5 @@ else()
 endif()
 
 if(NOT TARGET cxxopts)
-	add_custom_target(cxxopts)
+    add_custom_target(cxxopts)
 endif()

cmake/modules/falcosecurity-libs.cmake

@@ -83,7 +83,6 @@ set(BUILD_LIBSCAP_EXAMPLES OFF CACHE BOOL "")
 
 set(USE_BUNDLED_TBB ON CACHE BOOL "")
 set(USE_BUNDLED_JSONCPP ON CACHE BOOL "")
-set(USE_BUNDLED_NLOHMANN_JSON ON CACHE BOOL "")
 set(USE_BUNDLED_VALIJSON ON CACHE BOOL "")
 set(USE_BUNDLED_RE2 ON CACHE BOOL "")
 set(USE_BUNDLED_UTHASH ON CACHE BOOL "")

cmake/modules/njson.cmake

@@ -12,16 +12,34 @@
 # specific language governing permissions and limitations under the License.
 #
 
-if(USE_BUNDLED_NLOHMANN_JSON)
+#
+# njson (https://github.com/nlohmann/json)
+#
+
+option(USE_BUNDLED_NLOHMANN_JSON "Enable building of the bundled nlohmann-json" ${USE_BUNDLED_DEPS})
+
+if(nlohmann_json_INCLUDE_DIRS)
+    # we already have nlohmnann-json
+elseif(NOT USE_BUNDLED_NLOHMANN_JSON)
+    find_path(nlohmann_json_INCLUDE_DIRS NAMES nlohmann)
+
+    if(nlohmann_json_INCLUDE_DIRS)
+        message(STATUS "Found nlohmann-json: include: ${nlohmann_json_INCLUDE_DIRS}")
+    else()
+        message(FATAL_ERROR "Couldn't find system nlohmann-json")
+    endif()
+else()
+    set(nlohmann_json_INCLUDE_DIRS "${PROJECT_BINARY_DIR}/njson-prefix/include")
+
+    message(STATUS "Using bundled nlohmann-json in ${nlohmann_json_INCLUDE_DIRS}")
+
     ExternalProject_Add(njson
         URL "https://github.com/nlohmann/json/archive/v3.3.0.tar.gz"
         URL_HASH "SHA256=2fd1d207b4669a7843296c41d3b6ac5b23d00dec48dba507ba051d14564aa801"
         CMAKE_ARGS -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=${PROJECT_BINARY_DIR}/njson-prefix -DJSON_BuildTests=OFF -DBUILD_TESTING=OFF
     )
+endif()
 
-    set(nlohmann_json_INCLUDE_DIRS ${PROJECT_BINARY_DIR}/njson-prefix/include)
+if(NOT TARGET njson)
-else()
-    find_package(nlohmann_json CONFIG REQUIRED)
-    get_target_property(nlohmann_json_INCLUDE_DIRS nlohmann_json::nlohmann_json INTERFACE_INCLUDE_DIRECTORIES)
     add_custom_target(njson)
 endif()

cmake/modules/yaml-cpp.cmake

@@ -11,31 +11,46 @@
 # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
 # specific language governing permissions and limitations under the License.
 #
-mark_as_advanced(YAMLCPP_INCLUDE_DIR YAMLCPP_LIB)
+
-if(NOT USE_BUNDLED_DEPS)
+#
-  find_path(YAMLCPP_INCLUDE_DIR NAMES yaml-cpp/yaml.h)
+# yamlcpp (https://github.com/jbeder/yaml-cpp)
-  find_library(YAMLCPP_LIB NAMES yaml-cpp)
+#
-  if(YAMLCPP_INCLUDE_DIR AND YAMLCPP_LIB)
+
-    message(STATUS "Found yamlcpp: include: ${YAMLCPP_INCLUDE_DIR}, lib: ${YAMLCPP_LIB}")
+option(USE_BUNDLED_YAMLCPP "Enable building of the bundled yamlcpp" ${USE_BUNDLED_DEPS})
-  else()
+
-    message(FATAL_ERROR "Couldn't find system yamlcpp")
+if(YAMLCPP_INCLUDE_DIR)
-  endif()
+    # we already have yamlcpp
-  add_custom_target(yamlcpp)
+elseif(NOT USE_BUNDLED_YAMLCPP)
+    find_path(YAMLCPP_INCLUDE_DIR NAMES yaml-cpp/yaml.h)
+    find_library(YAMLCPP_LIB NAMES yaml-cpp)
+
+    if(YAMLCPP_INCLUDE_DIR)
+        message(STATUS "Found yamlcpp: include: ${YAMLCPP_INCLUDE_DIR}")
+    else()
+        message(FATAL_ERROR "Couldn't find system yamlcpp")
+    endif()
 else()
-  set(YAMLCPP_SRC "${PROJECT_BINARY_DIR}/yamlcpp-prefix/src/yamlcpp")
+    set(YAMLCPP_SRC "${PROJECT_BINARY_DIR}/yamlcpp-prefix/src/yamlcpp")
-  message(STATUS "Using bundled yaml-cpp in '${YAMLCPP_SRC}'")
+    set(YAMLCPP_INCLUDE_DIR "${YAMLCPP_SRC}/include")
-  if(NOT WIN32)
+
-    set(YAMLCPP_LIB "${YAMLCPP_SRC}/libyaml-cpp.a")
+    message(STATUS "Using bundled yaml-cpp in '${YAMLCPP_SRC}'")
-  else()
+
-    set(YAMLCPP_LIB "${YAMLCPP_SRC}/${CMAKE_BUILD_TYPE}/yaml-cpp.lib")
+    if(NOT WIN32)
-  endif()
+        set(YAMLCPP_LIB "${YAMLCPP_SRC}/libyaml-cpp.a")
-  set(YAMLCPP_INCLUDE_DIR "${YAMLCPP_SRC}/include")
+    else()
-  ExternalProject_Add(
+        set(YAMLCPP_LIB "${YAMLCPP_SRC}/${CMAKE_BUILD_TYPE}/yaml-cpp.lib")
-    yamlcpp
+    endif()
-    URL "https://github.com/jbeder/yaml-cpp/archive/yaml-cpp-0.7.0.tar.gz"
+
-    URL_HASH "SHA256=43e6a9fcb146ad871515f0d0873947e5d497a1c9c60c58cb102a97b47208b7c3"
+    ExternalProject_Add(
-    BUILD_BYPRODUCTS ${YAMLCPP_LIB}
+        yamlcpp
-    CMAKE_ARGS -DCMAKE_BUILD_TYPE=Release -DYAML_MSVC_SHARED_RT=Off -DYAML_BUILD_SHARED_LIBS=Off -DYAML_CPP_BUILD_TESTS=Off -DYAML_CPP_BUILD_TOOLS=OFF -DYAML_CPP_BUILD_CONTRIB=OFF -DCMAKE_DEBUG_POSTFIX=''
+        URL "https://github.com/jbeder/yaml-cpp/archive/yaml-cpp-0.7.0.tar.gz"
-    BUILD_IN_SOURCE 1
+        URL_HASH "SHA256=43e6a9fcb146ad871515f0d0873947e5d497a1c9c60c58cb102a97b47208b7c3"
-    INSTALL_COMMAND "")
+        BUILD_BYPRODUCTS ${YAMLCPP_LIB}
+        CMAKE_ARGS -DCMAKE_BUILD_TYPE=Release -DYAML_MSVC_SHARED_RT=Off -DYAML_BUILD_SHARED_LIBS=Off -DYAML_CPP_BUILD_TESTS=Off -DYAML_CPP_BUILD_TOOLS=OFF -DYAML_CPP_BUILD_CONTRIB=OFF -DCMAKE_DEBUG_POSTFIX=''
+        BUILD_IN_SOURCE 1
+        INSTALL_COMMAND "")
+endif()
+
+if(NOT TARGET yamlcpp)
+    add_custom_target(yamlcpp)
 endif()