add auto detection of installed rapidjson

libretroshare/src/serialiser/rsserializer.h

@@ -154,7 +154,11 @@
 #include <string.h>
 #include <iostream>
 #include <string>
+#ifdef HAS_RAPIDJSON
+#include <rapidjson/document.h>
+#else
 #include <rapid_json/document.h>
+#endif // HAS_RAPIDJSON
 
 #include "retroshare/rsflags.h"
 #include "serialiser/rsserial.h"

libretroshare/src/serialiser/rstypeserializer.cc

@@ -36,8 +36,11 @@
 #include <string>
 #include <typeinfo> // for typeid
 
-#include <rapid_json/document.h>
+#ifdef HAS_RAPIDJSON
+#include <rapidjson/prettywriter.h>
+#else
 #include <rapid_json/prettywriter.h>
+#endif // HAS_RAPIDJSON
 
 //static const uint32_t MAX_SERIALIZED_ARRAY_SIZE = 500 ;
 static const uint32_t MAX_SERIALIZED_CHUNK_SIZE = 10*1024*1024 ; // 10 MB.

libretroshare/src/serialiser/rstypeserializer.h

@@ -35,7 +35,11 @@
 #include "serialiser/rsserializer.h"
 #include "serialiser/rsserializable.h"
 
+#ifdef HAS_RAPIDJSON
+#include <rapidjson/document.h>
+#else
 #include <rapid_json/document.h>
+#endif // HAS_RAPIDJSON
 #include <typeinfo> // for typeid
 #include <type_traits>
 #include <errno.h>

libretroshare/src/use_libretroshare.pri

@@ -16,7 +16,15 @@ bitdht {
 # when rapidjson is mainstream on all distribs, we will not need the sources
 # anymore in the meantime, they are part of the RS directory so that it is
 # always possible to find them
-INCLUDEPATH *= $$system_path($$clean_path($${PWD}/../../rapidjson-1.1.0))
+RAPIDJSON_AVAILABLE = $$system(pkg-config --atleast-version 1.1 RapidJSON && echo yes)
+isEmpty(RAPIDJSON_AVAILABLE) {
+    message("using built-in rapidjson")
+    INCLUDEPATH *= $$system_path($$clean_path($${PWD}/../../rapidjson-1.1.0))
+} else {
+    message("using systems rapidjson")
+    DEFINES *= HAS_RAPIDJSON
+}
+
 
 sLibs =
 mLibs = $$RS_SQL_LIB ssl crypto $$RS_THREAD_LIB $$RS_UPNP_LIB