diff --git a/libs/main/core/pibase.h b/libs/main/core/pibase.h
index 82b95935..593a0dfa 100644
--- a/libs/main/core/pibase.h
+++ b/libs/main/core/pibase.h
@@ -358,7 +358,7 @@ inline bool piCompareBinary(const void * f, const void * s, size_t size) {
  *
  * Example:
  * \snippet piincludes.cpp round */
-template<typename T> inline int piRound(const T & v) {return int(v >= T(0.) ? v + T(0.5) : v - T(0.5));}
+template<typename T> inline constexpr int piRound(const T & v) {return int(v >= T(0.) ? v + T(0.5) : v - T(0.5));}
 
 /*! \brief Templated function return floor of float falue
  * \details Floor is the largest integer that is not greater than value \n
@@ -368,7 +368,7 @@ template<typename T> inline int piRound(const T & v) {return int(v >= T(0.) ? v
  *
  * Example:
  * \snippet piincludes.cpp floor */
-template<typename T> inline int piFloor(const T & v) {return v < T(0) ? int(v) - 1 : int(v);}
+template<typename T> inline constexpr int piFloor(const T & v) {return v < T(0) ? int(v) - 1 : int(v);}
 
 /*! \brief Templated function return ceil of float falue
  * \details Ceil is the smallest integer that is not less than value \n
@@ -378,7 +378,7 @@ template<typename T> inline int piFloor(const T & v) {return v < T(0) ? int(v) -
  *
  * Example:
  * \snippet piincludes.cpp ceil */
-template<typename T> inline int piCeil(const T & v) {return v < T(0) ? int(v) : int(v) + 1;}
+template<typename T> inline constexpr int piCeil(const T & v) {return v < T(0) ? int(v) : int(v) + 1;}
 
 /*! \brief Templated function return absolute of numeric falue
  * \details Absolute is the positive or equal 0 value \n
@@ -392,7 +392,7 @@ template<typename T> inline int piCeil(const T & v) {return v < T(0) ? int(v) :
  *
  * Example:
  * \snippet piincludes.cpp abs */
-template<typename T> inline T piAbs(const T & v) {return (v >= T(0) ? v : -v);}
+template<typename T> inline constexpr T piAbs(const T & v) {return (v >= T(0) ? v : -v);}
 
 /*! \brief Templated function return minimum of two values
  * \details There are some macros:
@@ -405,7 +405,7 @@ template<typename T> inline T piAbs(const T & v) {return (v >= T(0) ? v : -v);}
  *
  * Example:
  * \snippet piincludes.cpp min2 */
-template<typename T> inline T piMin(const T & f, const T & s) {return ((f > s) ? s : f);}
+template<typename T> inline constexpr T piMin(const T & f, const T & s) {return ((f > s) ? s : f);}
 
 /*! \brief Templated function return minimum of tree values
  * \details There are some macros:
@@ -418,7 +418,7 @@ template<typename T> inline T piMin(const T & f, const T & s) {return ((f > s) ?
  *
  * Example:
  * \snippet piincludes.cpp min3 */
-template<typename T> inline T piMin(const T & f, const T & s, const T & t) {return ((f < s && f < t) ? f : ((s < t) ? s : t));}
+template<typename T> inline constexpr T piMin(const T & f, const T & s, const T & t) {return ((f < s && f < t) ? f : ((s < t) ? s : t));}
 
 /*! \brief Templated function return maximum of two values
  * \details There are some macros:
@@ -431,7 +431,7 @@ template<typename T> inline T piMin(const T & f, const T & s, const T & t) {retu
  *
  * Example:
  * \snippet piincludes.cpp max2 */
-template<typename T> inline T piMax(const T & f, const T & s) {return ((f < s) ? s : f);}
+template<typename T> inline constexpr T piMax(const T & f, const T & s) {return ((f < s) ? s : f);}
 
 /*! \brief Templated function return maximum of tree values
  * \details There are some macros:
@@ -444,7 +444,7 @@ template<typename T> inline T piMax(const T & f, const T & s) {return ((f < s) ?
  *
  * Example:
  * \snippet piincludes.cpp max3 */
-template<typename T> inline T piMax(const T & f, const T & s, const T & t) {return ((f > s && f > t) ? f : ((s > t) ? s : t));}
+template<typename T> inline constexpr T piMax(const T & f, const T & s, const T & t) {return ((f > s && f > t) ? f : ((s > t) ? s : t));}
 
 /*! \brief Templated function return clamped value
  * \details Clamped is the not greater than "max" and not lesser than "min" value \n
@@ -458,7 +458,7 @@ template<typename T> inline T piMax(const T & f, const T & s, const T & t) {retu
  *
  * Example:
  * \snippet piincludes.cpp clamp */
-template<typename T> inline T piClamp(const T & v, const T & min, const T & max) {return (v > max ? max : (v < min ? min : v));}
+template<typename T> inline constexpr T piClamp(const T & v, const T & min, const T & max) {return (v > max ? max : (v < min ? min : v));}
 
 /// Function inverse byte order in memory block
 inline void piLetobe(void * data, int size) {