enable/disable some warnings

disable warnings about old-style casts, unused results and literal
suffix, since they are of little interest and mostly caused by external
libraries (mpi, c/c++ standard libraries);
enable 'uninitialized' warning for many2many lib since that one is
indeed important;

src/finiteVolume/Make/options

@@ -2,6 +2,9 @@ EXE_INC = \
     -I$(LIB_SRC)/triSurface/lnInclude \
     -I$(LIB_SRC)/meshTools/lnInclude \
     -I$(LIB_SRC)/finiteVolume/lnInclude \
+    -Wno-old-style-cast \
+    -Wno-unused-result \
+    -Wno-literal-suffix
 
 LIB_LIBS = \
     -lOpenFOAM \

src/lagrangian/cfdemParticle/Make/options

@@ -9,7 +9,6 @@ include $(CFDEM_ADD_LIBS_DIR)/additionalLibs
 EXE_INC = \
      $(PFLAGS) \
      $(PINC) \
-    -I ./cfdemParticle \
     -I$(LIB_SRC)/finiteVolume/lnInclude \
     -I$(LIB_SRC)/transportModels \
     -I$(LIB_SRC)/TurbulenceModels/turbulenceModels/lnInclude \
@@ -19,6 +18,9 @@ EXE_INC = \
     -I$(CFDEM_LIGGGHTS_SRC_DIR) \
     -I$(CFDEM_M2MLIB_PATH) \
     -I$(CFDEM_SRC_DIR)/cfdTools \
+    -Wno-old-style-cast \
+    -Wno-unused-result \
+    -Wno-literal-suffix
 
 LIB_LIBS = \
      $(PLIBS) \

src/lagrangian/cfdemParticle/subModels/dataExchangeModel/twoWayMany2Many/library/Makefile.fedora_fpic

@@ -6,7 +6,7 @@ SHELL = /bin/sh
 
 CC =		mpic++
 CCFLAGS =	-O2 -fPIC \
-		 -funroll-loops -fstrict-aliasing -Wall -W -Wno-uninitialized
+		 -funroll-loops -fstrict-aliasing -Wall -Wextra -Wno-unused-result -Wno-literal-suffix
 DEPFLAGS =	-M
 LINK =		mpic++
 LINKFLAGS =	-O -fPIC

src/lagrangian/cfdemParticle/subModels/dataExchangeModel/twoWayMany2Many/library/Makefile.fedora_fpic_debug

@@ -6,7 +6,7 @@ SHELL = /bin/sh
 
 CC =		mpic++
 CCFLAGS =	-g -O2 -fPIC \
-		 -funroll-loops -fstrict-aliasing -Wall -W -Wno-uninitialized
+		 -funroll-loops -fstrict-aliasing -Wall -Wextra -Wno-unused-result -Wno-literal-suffix
 DEPFLAGS =	-M
 LINK =		mpic++
 LINKFLAGS =	-O -fPIC