1 files changed, 49 insertions, 0 deletions
diff --git a/externals/find-modules/Findnlohmann_json.cmake b/externals/find-modules/Findnlohmann_json.cmake
new file mode 100644
index 000000000..b0c5b3e4e
--- /dev/null
+++ b/externals/find-modules/Findnlohmann_json.cmake
@@ -0,0 +1,49 @@
+
+find_package(PkgConfig QUIET)
+pkg_check_modules(PC_nlohmann_json QUIET nlohmann_json)
+
+find_path(nlohmann_json_INCLUDE_DIR
+  NAMES json.hpp
+  PATHS ${PC_nlohmann_json_INCLUDE_DIRS}
+  PATH_SUFFIXES nlohmann
+)
+
+if(nlohmann_json_INCLUDE_DIR)
+  file(STRINGS "${nlohmann_json_INCLUDE_DIR}/json.hpp" _nlohmann_json_version_lines
+    REGEX "#define[ \t]+NLOHMANN_JSON_VERSION_(MAJOR|MINOR|PATCH)")
+  string(REGEX REPLACE ".*NLOHMANN_JSON_VERSION_MAJOR +\([0-9]+\).*" "\\1" _nlohmann_json_version_major "${_nlohmann_json_version_lines}")
+  string(REGEX REPLACE ".*NLOHMANN_JSON_VERSION_MINOR +\([0-9]+\).*" "\\1" _nlohmann_json_version_minor "${_nlohmann_json_version_lines}")
+  string(REGEX REPLACE ".*NLOHMANN_JSON_VERSION_PATCH +\([0-9]+\).*" "\\1" _nlohmann_json_version_patch "${_nlohmann_json_version_lines}")
+  set(nlohmann_json_VERSION "${_nlohmann_json_version_major}.${_nlohmann_json_version_minor}.${_nlohmann_json_version_patch}")
+  unset(_nlohmann_json_version_major)
+  unset(_nlohmann_json_version_minor)
+  unset(_nlohmann_json_version_patch)
+  unset(_nlohmann_json_version_lines)
+endif()
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(nlohmann_json
+  FOUND_VAR nlohmann_json_FOUND
+  REQUIRED_VARS
+    nlohmann_json_INCLUDE_DIR
+    nlohmann_json_VERSION
+  VERSION_VAR nlohmann_json_VERSION
+)
+
+if(nlohmann_json_FOUND)
+  set(nlohmann_json_INCLUDE_DIRS ${nlohmann_json_INCLUDE_DIR})
+  set(nlohmann_json_DEFINITIONS ${PC_nlohmann_json_CFLAGS_OTHER})
+endif()
+
+if(nlohmann_json_FOUND AND NOT TARGET nlohmann_json::nlohmann_json)
+  add_library(nlohmann_json::nlohmann_json UNKNOWN IMPORTED)
+  set_target_properties(nlohmann_json::nlohmann_json PROPERTIES
+    IMPORTED_LOCATION "${nlohmann_json_LIBRARY}"
+    INTERFACE_COMPILE_OPTIONS "${PC_nlohmann_json_CFLAGS_OTHER}"
+    INTERFACE_INCLUDE_DIRECTORIES "${nlohmann_json_INCLUDE_DIR}"
+  )
+endif()
+
+mark_as_advanced(
+    nlohmann_json_INCLUDE_DIR
+)