Add a flag in cmake to comile with double or single precision, just set...

Add a flag in cmake to comile with double or single precision, just set SCALFMM_USE_DOUBLE_PRECISION

CMakeLists.txt

@@ -26,6 +26,7 @@ OPTION( SCALFMM_BUILD_TESTS "Set to ON to build fonctionnalities Tests" ON )
 OPTION( SCALFMM_BUILD_UTESTS "Set to ON to build UTests" ON )
 OPTION( SCALFMM_BUILD_DEBUG "Set to ON to build in Debug" OFF )
 OPTION( SCALFMM_USE_MEM_STATS "Set to ON to profile memory" OFF )
+OPTION( SCALFMM_USE_DOUBLE_PRECISION "Set to ON to compile in double precision" OFF )
 
 
 # Test if openmp is here

Src/ScalFmmConfig.h.cmake

@@ -27,4 +27,10 @@
 
 #cmakedefine SCALFMM_USE_MEM_STATS
 
+///////////////////////////////////////////////////////
+// Double precision
+///////////////////////////////////////////////////////
+
+#cmakedefine SCALFMM_USE_DOUBLE_PRECISION
+
 #endif // CONFIG_H

Src/Utils/FGlobal.hpp

@@ -53,7 +53,11 @@
 // Types
 ///////////////////////////////////////////////////////
 
-typedef float FReal;
+#ifdef SCALFMM_USE_DOUBLE_PRECISION
+    typedef double FReal;
+#else
+    typedef float FReal;
+#endif
 
 typedef long long FSize;