STYLE: make some OSspecific constructors explicit

src/OSspecific/POSIX/Make/files

+clockTime/clockTime.C
+clockValue/clockValue.C
+cpuInfo/cpuInfo.C
+cpuTime/cpuTime.C
+memInfo/memInfo.C
 signals/sigFpe.C
 signals/sigSegv.C
 signals/sigInt.C
@@ -8,11 +13,6 @@ regExpPosix.C
 timer.C
 fileStat.C
 POSIX.C
-cpuTime/cpuTime.C
-clockTime/clockTime.C
-clockValue/clockValue.C
-cpuInfo/cpuInfo.C
-memInfo/memInfo.C
 
 /*
  * Note: fileMonitor assumes inotify by default. Compile with -DFOAM_USE_STAT

src/OSspecific/POSIX/POSIX.H

@@ -51,8 +51,8 @@ namespace POSIX
     //- Declare namespace and its debug switch
     NamespaceName("POSIX");
 
-    const label pathLengthChunk = 256;
-    const label pathLengthMax = 4096;
+    constexpr label pathLengthChunk = 256;
+    constexpr label pathLengthMax = 4096;
 }
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

src/OSspecific/POSIX/fileMonitor.H

@@ -120,7 +120,7 @@ public:
     // Constructors
 
         //- Construct null
-        fileMonitor(const bool useInotify);
+        explicit fileMonitor(const bool useInotify);
 
 
     //- Destructor

src/OSspecific/POSIX/fileStat.H

@@ -111,7 +111,7 @@ public:
         );
 
         //- Construct from Istream
-        fileStat(Istream& is);
+        explicit fileStat(Istream& is);
 
 
     // Member Functions

src/OSspecific/POSIX/timer.H

@@ -114,9 +114,8 @@ public:
 
     // Constructors
 
-        //- Construct from components.
-        //  newTimeOut=0 makes it do nothing.
-        timer(const unsigned int newTimeOut);
+        //- Construct with specified time-out, a value of 0 makes it a no-op.
+        explicit timer(unsigned int seconds);
 
 
     //- Destructor