Adding a cmake option to exclude the jsoncpp files from install. Useful when used used as a submodule

Author: nv-jdeligiannis

CMakeLists.txt

@@ -78,6 +78,7 @@ option(JSONCPP_WITH_STRICT_ISO "Issue all the warnings demanded by strict ISO C
 option(JSONCPP_WITH_PKGCONFIG_SUPPORT "Generate and install .pc files" ON)
 option(JSONCPP_WITH_CMAKE_PACKAGE "Generate and install cmake package files" ON)
 option(JSONCPP_WITH_EXAMPLE "Compile JsonCpp example" OFF)
+option(JSONCPP_WITH_INSTALL "make JsonCpp header and libraries part of the install target" ON)
 option(JSONCPP_STATIC_WINDOWS_RUNTIME "Use static (MT/MTd) Windows runtime" OFF)
 option(BUILD_SHARED_LIBS "Build jsoncpp_lib as a shared library." ON)
 option(BUILD_STATIC_LIBS "Build jsoncpp_lib as a static library." ON)

include/CMakeLists.txt

@@ -1,5 +1,8 @@
+if (JSONCPP_WITH_INSTALL)
+
 file(GLOB INCLUDE_FILES "json/*.h")
 install(FILES
     ${INCLUDE_FILES}
     DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/json)
 
+endif()

src/lib_json/CMakeLists.txt

@@ -196,10 +196,13 @@ if(BUILD_OBJECT_LIBS)
     list(APPEND CMAKE_TARGETS ${OBJECT_LIB})
 endif()
 
+if (JSONCPP_WITH_INSTALL)
+
 install(TARGETS ${CMAKE_TARGETS} ${INSTALL_EXPORT}
     RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
     LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
     ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
     OBJECTS DESTINATION ${CMAKE_INSTALL_LIBDIR}
 )
 
+endif()