Index: /issm/trunk/configs/macosx64/macosx64.sh.petsc2
===================================================================
--- /issm/trunk/configs/macosx64/macosx64.sh.petsc2	(revision 4274)
+++ /issm/trunk/configs/macosx64/macosx64.sh.petsc2	(revision 4275)
@@ -1,3 +1,3 @@
 #!/bin/sh
 
-./configure --prefix=$ISSM_DIR --with-matlab-dir=$MATLAB_DIR --with-triangle-dir=$ISSM_DIR/externalpackages/triangle/install --with-metis-dir=$ISSM_DIR/externalpackages/metis/install --with-petsc-dir=$ISSM_DIR/externalpackages/petsc/install  --with-petsc-version=2 --with-mpi-include=$ISSM_DIR/externalpackages/mpich2/install/include  --with-mpi-lib=" $ISSM_DIR/externalpackages/mpich2/install/lib/libpmpich.a $ISSM_DIR/externalpackages/mpich2/install/lib/libmpich.a" --with-petsc-arch=$ISSM_ARCH --with-dakota-dir=$ISSM_DIR/externalpackages/dakota/install --with-blas-lapack-dir=$ISSM_DIR/externalpackages/petsc/install/$ISSM_ARCH --with-plapack-lib="-L$ISSM_DIR/externalpackages/petsc/install/$ISSM_ARCH -lPLAPACK" --with-plapack-include="$ISSM_DIR/externalpackages/petsc/install/externalpackages/PLAPACKR32-hg/INCLUDE" --with-blacs-dir=$ISSM_DIR/externalpackages/petsc/install/$ISSM_ARCH --with-scalapack-dir=$ISSM_DIR/externalpackages/petsc/install/$ISSM_ARCH/ --with-mumps-dir=$ISSM_DIR/externalpackages/petsc/install/$ISSM_ARCH --with-fortran-lib="/usr/local/lib/libgfortran.a" --with-math-lib="/usr/lib/libm.dylib" --with-graphics-lib="/usr/X11/lib/libX11.dylib" --with-cxxoptflags="-march=opteron -O2" --with-numthreads=8
+./configure --prefix=$ISSM_DIR --with-matlab-dir=$MATLAB_DIR --with-triangle-dir=$ISSM_DIR/externalpackages/triangle/install --with-metis-dir=$ISSM_DIR/externalpackages/metis/install --with-petsc-dir=$ISSM_DIR/externalpackages/petsc/install  --with-petsc-version=2 --with-mpi-include=$ISSM_DIR/externalpackages/mpich2/install/include  --with-mpi-lib=" $ISSM_DIR/externalpackages/mpich2/install/lib/libpmpich.a $ISSM_DIR/externalpackages/mpich2/install/lib/libmpich.a" --with-petsc-arch=$ISSM_ARCH --with-dakota-dir=$ISSM_DIR/externalpackages/dakota/install --with-blas-lapack-dir=$ISSM_DIR/externalpackages/petsc/install/externalpackages/fblaslapack/$ISSM_ARCH --with-plapack-lib="-L$ISSM_DIR/externalpackages/petsc/install/externalpackages/PLAPACKR32-hg/$ISSM_ARCH -lPLAPACK" --with-plapack-include="$ISSM_DIR/externalpackages/petsc/install/externalpackages/PLAPACKR32-hg/$ISSM_ARCH/INCLUDE" --with-blacs-dir=$ISSM_DIR/externalpackages/petsc/install/externalpackages/blacs-dev/$ISSM_ARCH --with-scalapack-dir=$ISSM_DIR/externalpackages/petsc/install/externalpackages/SCALAPACK/$ISSM_ARCH/ --with-mumps-dir=$ISSM_DIR/externalpackages/petsc/install/externalpackages/MUMPS_4.6.3 --with-fortran-lib="/usr/local/lib/libgfortran.a" --with-math-lib="/usr/lib/libm.dylib" --with-graphics-lib="/usr/X11/lib/libX11.dylib" --with-cxxoptflags="-march=opteron -O2 -w" --with-numthreads=8
Index: /issm/trunk/m4/issm_options.m4
===================================================================
--- /issm/trunk/m4/issm_options.m4	(revision 4274)
+++ /issm/trunk/m4/issm_options.m4	(revision 4275)
@@ -704,5 +704,18 @@
 	MULTITHREADINLIB=""
 	if test "$NUMTHREADS_VALUE" != "1"; then
+		
 		MULTITHREADINGLIB="-lpthread -lrt"
+		case "${host_os}" in
+		*cygwin*)
+		MULTITHREADINGLIB="-lpthread -lrt"
+		;;
+		*linux*)
+		MULTITHREADINGLIB="-lpthread -lrt"
+		;;
+		*darwin*)
+		MULTITHREADINGLIB="-lpthread"
+		;;
+		esac
+
 		AC_DEFINE([_MULTITHREADING_],[1],[with numthreads enabled])
 		AC_DEFINE_UNQUOTED([_NUMTHREADS_],[$NUMTHREADS_VALUE],[number of threads])
Index: /issm/trunk/src/c/toolkits/metis/metisincludes.h
===================================================================
--- /issm/trunk/src/c/toolkits/metis/metisincludes.h	(revision 4274)
+++ /issm/trunk/src/c/toolkits/metis/metisincludes.h	(revision 4275)
@@ -9,5 +9,5 @@
 #include <metis.h>
 
-void METIS_PartMeshNodal(int *, int *, idxtype *, int *, int *, int *, int *, idxtype *, idxtype *);
+extern "C" void METIS_PartMeshNodal(int *, int *, idxtype *, int *, int *, int *, int *, idxtype *, idxtype *);
 
 #endif