Hi All,

My code needs to link to an external C++ library (CGAL). The code is written in Fortran and I have already written interface to let Fortran call C++ function. For the sequential version without PETSc, it can be compiled without problem using the following makefile. The parallel version without CGAL can also be compiled successfully. However, when I tried to use PETSc together with CGAL library, I cannot compile the code. My questions is: How can I modify the makefile? Do I need to reconfigure PETSc with special flags? All the makefile samples are shown below.

#makefile for sequential version

FC = gfortran
#FC = ifort
CXX = g++ -std=c++11

DLIB = -lstdc++ -lm -L/usr/local/lib -rdynamic /usr/local/lib/libmpfr.so /usr/local/lib/libgmp.so /usr/local/lib/libCGAL_ImageIO.so.11.0.1 /usr/local/lib/libCGAL.so.11.0.1 /usr/local/lib/libboost_thread.so /usr/local/lib/libboost_system.so -lpthread -lGLU -lGL -lX11 -lXext -lz /usr/local/lib/libCGAL_ImageIO.so.11.0.1 /usr/local/lib/libCGAL.so.11.0.1 /usr/local/lib/libboost_thread.so /usr/local/lib/libboost_system.so -lpthread -lGLU -lGL -lX11 -lXext -lz /usr/local/lib/libmpfr.so /usr/local/lib/libgmp.so /usr/local/lib/libboost_thread.so /usr/local/lib/libboost_system.so -lpthread -Wl,-rpath,/usr/local/lib

FFLAGS = -O3
CXXFLAGS = -O3

FPPFLAGS =  -DUSECGAL

SRC =./../../

SOURCES = $(SRC)usg/math_common.o\
    $(SRC)usg/geometry_definition.o\
    $(SRC)usg/cgal_common.o\

...

executable: $(SOURCES)
$(FC) $(FFLAGS) $(FPPFLAGS) -o executable.out $(SOURCES) ${LIS_LIB} $(DLIB)
%.o:%.F90
    $(FC) $(FFLAGS) $(FPPFLAGS) -c -frounding-math $< -o $@
%.o:%.cpp
    $(CXX) $(CXXFLAGS) $(CPPFLAGS) -c -frounding-math $< -o $@


#makefile for parallel version with PETSc, without CGAL

#FC = ifort
#FC = gfortran

DLIB = -lm

FFLAGS = -O3

FPPFLAGS =  -DUSEPETSC

SRC =./../../

SOURCES = $(SRC)usg/math_common.o\
    $(SRC)usg/geometry_definition.o\
    $(SRC)usg/cgal_common.o\

...

executable: $(SOURCES) chkopts
-${FLINKER} $(FFLAGS) $(FPPFLAGS) $(CPPFLAGS) -o executable.out $(SOURCES) ${PETSC_LIB}


#makefile for parallel version with PETSc, with CGAL, CANNOT work

#FC = ifort
#FC = gfortran

DLIB = -lm

FFLAGS = -O3

FPPFLAGS =  -DUSEPETSC -DUSECGAL

SRC =./../../

SOURCES = $(SRC)usg/math_common.o\
    $(SRC)usg/geometry_definition.o\
    $(SRC)usg/cgal_common.o\

...

executable: $(SOURCES) chkopts
-${FLINKER} $(FFLAGS) $(FPPFLAGS) $(CPPFLAGS) -o executable.out $(SOURCES) ${PETSC_LIB}

%.o:%.F90
    $(FC) $(FFLAGS) $(FPPFLAGS) -c -frounding-math $< -o $@
%.o:%.cpp
    $(CXX) $(CXXFLAGS) $(CPPFLAGS) -c -frounding-math $< -o $@


Thanks,

Danyang

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