Get recoll to compile with clang (on freebsd) and eliminate warnings. You can no build recoll with make CXX=clang LINK=clang

src/query/filtseq.cpp

@@ -54,7 +54,7 @@ DocSeqFiltered::DocSeqFiltered(RclConfig *conf, RefCntr<DocSequence> iseq,
     setFiltSpec(filtspec);
 }
 
-bool DocSeqFiltered::setFiltSpec(DocSeqFiltSpec &filtspec)
+bool DocSeqFiltered::setFiltSpec(const DocSeqFiltSpec &filtspec)
 {
     LOGDEB0(("DocSeqFiltered::setFiltSpec\n"));
     for (unsigned int i = 0; i < filtspec.crits.size(); i++) {

src/query/filtseq.h

@@ -37,7 +37,7 @@ public:
 		   DocSeqFiltSpec &filtspec);
     virtual ~DocSeqFiltered() {}
     virtual bool canFilter() {return true;}
-    virtual bool setFiltSpec(DocSeqFiltSpec &filtspec);
+    virtual bool setFiltSpec(const DocSeqFiltSpec &filtspec);
     virtual bool getDoc(int num, Rcl::Doc &doc, string *sh = 0);
     virtual int getResCnt() {return m_seq->getResCnt();}
  private:

src/query/reslistpager.h

@@ -26,7 +26,7 @@ using std::vector;
 
 class RclConfig;
 class PlainToRich;
-class HiliteData;
+struct HiliteData;
 
 /**
  * Manage a paged HTML result list. 

src/query/sortseq.cpp

@@ -41,7 +41,7 @@ public:
     } 
 };
 
-bool DocSeqSorted::setSortSpec(DocSeqSortSpec &sortspec)
+bool DocSeqSorted::setSortSpec(const DocSeqSortSpec &sortspec)
 {
     LOGDEB(("DocSeqSorted::setSortSpec\n"));
     m_spec = sortspec;

src/query/sortseq.h

@@ -36,7 +36,7 @@ class DocSeqSorted : public DocSeqModifier {
     }
     virtual ~DocSeqSorted() {}
     virtual bool canSort() {return true;}
-    virtual bool setSortSpec(DocSeqSortSpec &sortspec);
+    virtual bool setSortSpec(const DocSeqSortSpec &sortspec);
     virtual bool getDoc(int num, Rcl::Doc &doc, string *sh = 0);
     virtual int getResCnt() {return m_docsp.size();}
  private: