First draft Rewrite get all key with rnp

cmake/FindJSON-C.cmake

@@ -0,0 +1,127 @@
+# Copyright (c) 2018, 2024 Ribose Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS
+# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+
+#.rst:
+# FindJSON-C
+# -----------
+#
+# Find the json-c library.
+#
+# IMPORTED Targets
+# ^^^^^^^^^^^^^^^^
+#
+# This module defines :prop_tgt:`IMPORTED` targets:
+#
+# ``JSON-C::JSON-C``
+#   The json-c library, if found.
+#
+# Result variables
+# ^^^^^^^^^^^^^^^^
+#
+# This module defines the following variables:
+#
+# ::
+#
+#   JSON-C_FOUND          - true if the headers and library were found
+#   JSON-C_INCLUDE_DIRS   - where to find headers
+#   JSON-C_LIBRARIES      - list of libraries to link
+#   JSON-C_VERSION        - library version that was found, if any
+
+# use pkg-config to get the directories and then use these values
+# in the find_path() and find_library() calls
+find_package(PkgConfig)
+pkg_check_modules(PC_JSON-C QUIET json-c)
+
+# RHEL-based systems may have json-c12
+if (NOT PC_JSON-C_FOUND)
+  pkg_check_modules(PC_JSON-C QUIET json-c12)
+endif()
+
+# ..or even json-c13, accompanied by non-develop json-c (RHEL 8 ubi)
+if (NOT PC_JSON-C_FOUND)
+  pkg_check_modules(PC_JSON-C QUIET json-c13)
+endif()
+
+# find the headers
+find_path(JSON-C_INCLUDE_DIR
+  NAMES json_c_version.h
+  HINTS
+    ${PC_JSON-C_INCLUDEDIR}
+    ${PC_JSON-C_INCLUDE_DIRS}
+  PATH_SUFFIXES json-c json-c12 json-c13
+)
+
+# find the library
+find_library(JSON-C_LIBRARY
+  NAMES json-c libjson-c json-c12 libjson-c12 json-c13 libjson-c13
+  HINTS
+    ${PC_JSON-C_LIBDIR}
+    ${PC_JSON-C_LIBRARY_DIRS}
+)
+
+# determine the version
+if(PC_JSON-C_VERSION)
+    set(JSON-C_VERSION ${PC_JSON-C_VERSION})
+elseif(JSON-C_INCLUDE_DIR AND EXISTS "${JSON-C_INCLUDE_DIR}/json_c_version.h")
+    file(STRINGS "${JSON-C_INCLUDE_DIR}/json_c_version.h" _json-c_version_h
+      REGEX "^#define[\t ]+JSON_C_VERSION[\t ]+\"[^\"]*\"$")
+
+    string(REGEX REPLACE ".*#define[\t ]+JSON_C_VERSION[\t ]+\"([^\"]*)\".*"
+      "\\1" _json-c_version_str "${_json-c_version_h}")
+    set(JSON-C_VERSION "${_json-c_version_str}"
+                       CACHE INTERNAL "The version of json-c which was detected")
+endif()
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(JSON-C
+  REQUIRED_VARS JSON-C_LIBRARY JSON-C_INCLUDE_DIR JSON-C_VERSION
+  VERSION_VAR JSON-C_VERSION
+)
+
+if (JSON-C_FOUND)
+  set(JSON-C_INCLUDE_DIRS ${JSON-C_INCLUDE_DIR} ${PC_JSON-C_INCLUDE_DIRS})
+  set(JSON-C_LIBRARIES ${JSON-C_LIBRARY})
+endif()
+
+if (JSON-C_FOUND AND NOT TARGET JSON-C::JSON-C)
+  # create the new library target
+  add_library(JSON-C::JSON-C UNKNOWN IMPORTED)
+  # set the required include dirs for the target
+  if (JSON-C_INCLUDE_DIRS)
+    set_target_properties(JSON-C::JSON-C
+      PROPERTIES
+        INTERFACE_INCLUDE_DIRECTORIES "${JSON-C_INCLUDE_DIRS}"
+    )
+  endif()
+  # set the required libraries for the target
+  if (EXISTS "${JSON-C_LIBRARY}")
+    set_target_properties(JSON-C::JSON-C
+      PROPERTIES
+        IMPORTED_LINK_INTERFACE_LANGUAGES "C"
+        IMPORTED_LOCATION "${JSON-C_LIBRARY}"
+    )
+  endif()
+endif()
+
+mark_as_advanced(JSON-C_INCLUDE_DIR JSON-C_LIBRARY)