COMP: simplify scotch makefiles

As per patch provided by Bruno Santos @wyldckat to support Raspbian.
http://bugs.openfoam.org/view.php?id=2051

STYLE: drop unneeded linkage against old POSIX librt.so

Allwmake

@@ -204,7 +204,7 @@ echo "Build Scotch decomposition library $SCOTCH_VERSION"
 echo "    $SCOTCH_ARCH_PATH"
 
 # this needs generalizing
-scotchMakefile=../../etc/wmakeFiles/scotch/Makefile.inc.i686_pc_linux2.shlib-OpenFOAM-$WM_ARCH_OPTION$WM_LABEL_OPTION
+scotchMakefile=../../etc/wmakeFiles/scotch/Makefile.inc.i686_pc_linux2.shlib-OpenFOAM
 
 if [ -f $SCOTCH_ARCH_PATH/include/scotch.h \
   -a -r $FOAM_EXT_LIBBIN/libscotch.so \

etc/wmakeFiles/scotch/Makefile.inc.i686_pc_linux2.shlib-OpenFOAM

@@ -0,0 +1,33 @@
+# openfoam notes:
+# WM_CFLAGS, WM_LDFLAGS contain "-m32 -fPIC" etc
+# WM_LABEL_SIZE == 64 for 'long' instead of 'int' for OpenFOAM labels
+
+# compiled without pthread
+
+EXE         =
+LIB         = .so
+OBJ         = .o
+
+MAKE        = make
+AR          = gcc
+ARFLAGS     = $(WM_CFLAGS) -shared -o
+CAT         = cat
+CCS         = gcc
+CCP         = mpicc
+CCD         = mpicc
+CFLAGS      = $(WM_CFLAGS) -O3 -DCOMMON_FILE_COMPRESS_GZ -DCOMMON_RANDOM_FIXED_SEED -DSCOTCH_RENAME -Drestrict=__restrict
+
+# 32-bit vs. 64-bit labels
+ifeq ($(WM_LABEL_SIZE),64)
+CFLAGS     += -DINTSIZE64
+endif
+
+CLIBFLAGS   = -shared
+LDFLAGS     = -Xlinker --no-as-needed $(WM_LDFLAGS) -lz -lm
+CP          = cp
+LEX         = flex -Pscotchyy -olex.yy.c
+LN          = ln
+MKDIR       = mkdir
+MV          = mv
+RANLIB      = echo
+YACC        = bison -pscotchyy -y -b y

etc/wmakeFiles/scotch/Makefile.inc.i686_pc_linux2.shlib-OpenFOAM-32Int32

@@ -1,21 +0,0 @@
-EXE		=
-LIB		= .so
-OBJ		= .o
-
-MAKE		= make
-AR		= gcc
-ARFLAGS		= -m32 -shared -o
-CAT		= cat
-CCS		= gcc
-CCP		= mpicc
-CCD		= mpicc
-CFLAGS		= -m32 -O3 -DCOMMON_FILE_COMPRESS_GZ -DCOMMON_RANDOM_FIXED_SEED -DSCOTCH_RENAME -Drestrict=__restrict
-CLIBFLAGS	= -shared -fPIC
-LDFLAGS		= -Xlinker --no-as-needed -L$MPI_ARCH_PATH/lib -m32 -lz -lm -lrt
-CP		= cp
-LEX		= flex -Pscotchyy -olex.yy.c
-LN		= ln
-MKDIR		= mkdir
-MV		= mv
-RANLIB		= echo
-YACC		= bison -pscotchyy -y -b y

etc/wmakeFiles/scotch/Makefile.inc.i686_pc_linux2.shlib-OpenFOAM-64Int32

@@ -1,21 +0,0 @@
-EXE		=
-LIB		= .so
-OBJ		= .o
-
-MAKE		= make
-AR		= gcc
-ARFLAGS		= -shared -o
-CAT		= cat
-CCS		= gcc
-CCP		= mpicc
-CCD		= mpicc
-CFLAGS		= -O3 -DCOMMON_FILE_COMPRESS_GZ -DCOMMON_RANDOM_FIXED_SEED -DSCOTCH_RENAME -Drestrict=__restrict
-CLIBFLAGS	= -shared -fPIC
-LDFLAGS		= -Xlinker --no-as-needed -lz -lm -lrt
-CP		= cp
-LEX		= flex -Pscotchyy -olex.yy.c
-LN		= ln
-MKDIR		= mkdir
-MV		= mv
-RANLIB		= echo
-YACC		= bison -pscotchyy -y -b y

etc/wmakeFiles/scotch/Makefile.inc.i686_pc_linux2.shlib-OpenFOAM-64Int64

@@ -1,21 +0,0 @@
-EXE		=
-LIB		= .so
-OBJ		= .o
-
-MAKE		= make
-AR		= gcc
-ARFLAGS		= -shared -o
-CAT		= cat
-CCS		= gcc
-CCP		= mpicc
-CCD		= mpicc
-CFLAGS		= -O3 -DINTSIZE64 -DCOMMON_FILE_COMPRESS_GZ -DCOMMON_RANDOM_FIXED_SEED -DSCOTCH_RENAME -Drestrict=__restrict
-CLIBFLAGS	= -shared -fPIC
-LDFLAGS		= -Xlinker --no-as-needed -lz -lm -lrt
-CP		= cp
-LEX		= flex -Pscotchyy -olex.yy.c
-LN		= ln
-MKDIR		= mkdir
-MV		= mv
-RANLIB		= echo
-YACC		= bison -pscotchyy -y -b y