Shut up clang warnings

7 files changed, 67 insertions, 65 deletions

diff --git a/src/libexpr/local.mk b/src/libexpr/local.mk
index 4c1f4de19187..d1b1987fb037 100644
--- a/src/libexpr/local.mk
+++ b/src/libexpr/local.mk
@@ -6,6 +6,8 @@ libexpr_DIR := $(d)
 
 libexpr_SOURCES := $(wildcard $(d)/*.cc) $(d)/lexer-tab.cc $(d)/parser-tab.cc
 
+libexpr_CXXFLAGS := -Wno-deprecated-register
+
 libexpr_LIBS = libutil libstore libformat
 
 libexpr_LDFLAGS = -ldl
diff --git a/src/libmain/shared.hh b/src/libmain/shared.hh
index a7e6ef762120..65b288e1ff3e 100644
--- a/src/libmain/shared.hh
+++ b/src/libmain/shared.hh
@@ -88,7 +88,7 @@ extern volatile ::sig_atomic_t blockInt;
 
 string showBytes(unsigned long long bytes);
 
-class GCResults;
+struct GCResults;
 
 struct PrintFreed
 {
diff --git a/src/libstore/build.cc b/src/libstore/build.cc
index c1163e63d90f..70278a8785d6 100644
--- a/src/libstore/build.cc
+++ b/src/libstore/build.cc
@@ -806,7 +806,7 @@ public:
 
     void timedOut() override;
 
-    string key()
+    string key() override
     {
         /* Ensure that derivations get built in order of their name,
            i.e. a derivation named "aardvark" always comes before
@@ -815,7 +815,7 @@ public:
         return "b$" + storePathToName(drvPath) + "$" + drvPath;
     }
 
-    void work();
+    void work() override;
 
     Path getDrvPath()
     {
@@ -863,8 +863,8 @@ private:
     void deleteTmpDir(bool force);
 
     /* Callback used by the worker to write to the log. */
-    void handleChildOutput(int fd, const string & data);
-    void handleEOF(int fd);
+    void handleChildOutput(int fd, const string & data) override;
+    void handleEOF(int fd) override;
 
     /* Return the set of (in)valid paths. */
     PathSet checkPathValidity(bool returnValid, bool checkHash);
diff --git a/src/libstore/local-store.hh b/src/libstore/local-store.hh
index 105f3592c685..ebdf19bf1359 100644
--- a/src/libstore/local-store.hh
+++ b/src/libstore/local-store.hh
@@ -98,41 +98,41 @@ public:
 
     /* Implementations of abstract store API methods. */
 
-    bool isValidPath(const Path & path);
+    bool isValidPath(const Path & path) override;
 
-    PathSet queryValidPaths(const PathSet & paths);
+    PathSet queryValidPaths(const PathSet & paths) override;
 
-    PathSet queryAllValidPaths();
+    PathSet queryAllValidPaths() override;
 
-    ValidPathInfo queryPathInfo(const Path & path);
+    ValidPathInfo queryPathInfo(const Path & path) override;
 
-    Hash queryPathHash(const Path & path);
+    Hash queryPathHash(const Path & path) override;
 
-    void queryReferences(const Path & path, PathSet & references);
+    void queryReferences(const Path & path, PathSet & references) override;
 
-    void queryReferrers(const Path & path, PathSet & referrers);
+    void queryReferrers(const Path & path, PathSet & referrers) override;
 
-    Path queryDeriver(const Path & path);
+    Path queryDeriver(const Path & path) override;
 
-    PathSet queryValidDerivers(const Path & path);
+    PathSet queryValidDerivers(const Path & path) override;
 
-    PathSet queryDerivationOutputs(const Path & path);
+    PathSet queryDerivationOutputs(const Path & path) override;
 
-    StringSet queryDerivationOutputNames(const Path & path);
+    StringSet queryDerivationOutputNames(const Path & path) override;
 
-    Path queryPathFromHashPart(const string & hashPart);
+    Path queryPathFromHashPart(const string & hashPart) override;
 
-    PathSet querySubstitutablePaths(const PathSet & paths);
+    PathSet querySubstitutablePaths(const PathSet & paths) override;
 
     void querySubstitutablePathInfos(const Path & substituter,
         PathSet & paths, SubstitutablePathInfos & infos);
 
     void querySubstitutablePathInfos(const PathSet & paths,
-        SubstitutablePathInfos & infos);
+        SubstitutablePathInfos & infos) override;
 
     Path addToStore(const string & name, const Path & srcPath,
         bool recursive = true, HashType hashAlgo = htSHA256,
-        PathFilter & filter = defaultPathFilter, bool repair = false);
+        PathFilter & filter = defaultPathFilter, bool repair = false) override;
 
     /* Like addToStore(), but the contents of the path are contained
        in `dump', which is either a NAR serialisation (if recursive ==
@@ -142,43 +142,43 @@ public:
         bool recursive = true, HashType hashAlgo = htSHA256, bool repair = false);
 
     Path addTextToStore(const string & name, const string & s,
-        const PathSet & references, bool repair = false);
+        const PathSet & references, bool repair = false) override;
 
     void exportPath(const Path & path, bool sign,
-        Sink & sink);
+        Sink & sink) override;
 
-    Paths importPaths(bool requireSignature, Source & source);
+    Paths importPaths(bool requireSignature, Source & source) override;
 
-    void buildPaths(const PathSet & paths, BuildMode buildMode);
+    void buildPaths(const PathSet & paths, BuildMode buildMode) override;
 
     BuildResult buildDerivation(const Path & drvPath, const BasicDerivation & drv,
         BuildMode buildMode) override;
 
-    void ensurePath(const Path & path);
+    void ensurePath(const Path & path) override;
 
-    void addTempRoot(const Path & path);
+    void addTempRoot(const Path & path) override;
 
-    void addIndirectRoot(const Path & path);
+    void addIndirectRoot(const Path & path) override;
 
-    void syncWithGC();
+    void syncWithGC() override;
 
-    Roots findRoots();
+    Roots findRoots() override;
 
-    void collectGarbage(const GCOptions & options, GCResults & results);
+    void collectGarbage(const GCOptions & options, GCResults & results) override;
 
     /* Optimise the disk space usage of the Nix store by hard-linking
        files with the same contents. */
     void optimiseStore(OptimiseStats & stats);
 
     /* Generic variant of the above method.  */
-    void optimiseStore();
+    void optimiseStore() override;
 
     /* Optimise a single store path. */
     void optimisePath(const Path & path);
 
     /* Check the integrity of the Nix store.  Returns true if errors
        remain. */
-    bool verifyStore(bool checkContents, bool repair);
+    bool verifyStore(bool checkContents, bool repair) override;
 
     /* Register the validity of a path, i.e., that `path' exists, that
        the paths referenced by it exists, and in the case of an output
@@ -197,9 +197,9 @@ public:
     /* Query whether `path' previously failed to build. */
     bool hasPathFailed(const Path & path);
 
-    PathSet queryFailedPaths();
+    PathSet queryFailedPaths() override;
 
-    void clearFailedPaths(const PathSet & paths);
+    void clearFailedPaths(const PathSet & paths) override;
 
     void vacuumDB();
 
diff --git a/src/libstore/remote-store.hh b/src/libstore/remote-store.hh
index 09e250386c5c..b0787c072904 100644
--- a/src/libstore/remote-store.hh
+++ b/src/libstore/remote-store.hh
@@ -24,71 +24,72 @@ public:
 
     /* Implementations of abstract store API methods. */
 
-    bool isValidPath(const Path & path);
+    bool isValidPath(const Path & path) override;
 
-    PathSet queryValidPaths(const PathSet & paths);
+    PathSet queryValidPaths(const PathSet & paths) override;
 
-    PathSet queryAllValidPaths();
+    PathSet queryAllValidPaths() override;
 
-    ValidPathInfo queryPathInfo(const Path & path);
+    ValidPathInfo queryPathInfo(const Path & path) override;
 
-    Hash queryPathHash(const Path & path);
+    Hash queryPathHash(const Path & path) override;
 
-    void queryReferences(const Path & path, PathSet & references);
+    void queryReferences(const Path & path, PathSet & references) override;
 
-    void queryReferrers(const Path & path, PathSet & referrers);
+    void queryReferrers(const Path & path, PathSet & referrers) override;
 
-    Path queryDeriver(const Path & path);
+    Path queryDeriver(const Path & path) override;
 
-    PathSet queryValidDerivers(const Path & path);
+    PathSet queryValidDerivers(const Path & path) override;
 
-    PathSet queryDerivationOutputs(const Path & path);
+    PathSet queryDerivationOutputs(const Path & path) override;
 
-    StringSet queryDerivationOutputNames(const Path & path);
+    StringSet queryDerivationOutputNames(const Path & path) override;
 
-    Path queryPathFromHashPart(const string & hashPart);
+    Path queryPathFromHashPart(const string & hashPart) override;
 
-    PathSet querySubstitutablePaths(const PathSet & paths);
+    PathSet querySubstitutablePaths(const PathSet & paths) override;
 
     void querySubstitutablePathInfos(const PathSet & paths,
-        SubstitutablePathInfos & infos);
+        SubstitutablePathInfos & infos) override;
 
     Path addToStore(const string & name, const Path & srcPath,
         bool recursive = true, HashType hashAlgo = htSHA256,
-        PathFilter & filter = defaultPathFilter, bool repair = false);
+        PathFilter & filter = defaultPathFilter, bool repair = false) override;
 
     Path addTextToStore(const string & name, const string & s,
-        const PathSet & references, bool repair = false);
+        const PathSet & references, bool repair = false) override;
 
     void exportPath(const Path & path, bool sign,
-        Sink & sink);
+        Sink & sink) override;
 
-    Paths importPaths(bool requireSignature, Source & source);
+    Paths importPaths(bool requireSignature, Source & source) override;
 
-    void buildPaths(const PathSet & paths, BuildMode buildMode);
+    void buildPaths(const PathSet & paths, BuildMode buildMode) override;
 
     BuildResult buildDerivation(const Path & drvPath, const BasicDerivation & drv,
         BuildMode buildMode) override;
 
-    void ensurePath(const Path & path);
+    void ensurePath(const Path & path) override;
 
-    void addTempRoot(const Path & path);
+    void addTempRoot(const Path & path) override;
 
-    void addIndirectRoot(const Path & path);
+    void addIndirectRoot(const Path & path) override;
 
-    void syncWithGC();
+    void syncWithGC() override;
 
-    Roots findRoots();
+    Roots findRoots() override;
 
-    void collectGarbage(const GCOptions & options, GCResults & results);
+    void collectGarbage(const GCOptions & options, GCResults & results) override;
 
-    PathSet queryFailedPaths();
+    PathSet queryFailedPaths() override;
 
-    void clearFailedPaths(const PathSet & paths);
+    void clearFailedPaths(const PathSet & paths) override;
 
-    void optimiseStore();
+    void optimiseStore() override;
+
+    bool verifyStore(bool checkContents, bool repair) override;
 
-    bool verifyStore(bool checkContents, bool repair);
 private:
     AutoCloseFD fdSocket;
     FdSink to;
diff --git a/src/libutil/hash.cc b/src/libutil/hash.cc
index a83ba0a81817..1d973e7c8f14 100644
--- a/src/libutil/hash.cc
+++ b/src/libutil/hash.cc
@@ -115,7 +115,6 @@ const string base32Chars = "0123456789abcdfghijklmnpqrsvwxyz";
 
 string printHash32(const Hash & hash)
 {
-    Hash hash2(hash);
     unsigned int len = hashLength32(hash);
 
     string s;
diff --git a/src/nix-env/nix-env.cc b/src/nix-env/nix-env.cc
index 400b148e9ccf..313f8a8a8f35 100644
--- a/src/nix-env/nix-env.cc
+++ b/src/nix-env/nix-env.cc
@@ -1277,7 +1277,7 @@ static void opDeleteGenerations(Globals & globals, Strings opFlags, Strings opAr
         std::set<unsigned int> gens;
         for (auto & i : opArgs) {
             unsigned int n;
-            if (!string2Int(i, n) || n < 0)
+            if (!string2Int(i, n))
                 throw UsageError(format("invalid generation number ‘%1%’") % i);
             gens.insert(n);
         }