[petsc-users] How to add additional cpp flags in the makefile while compiling a code?

[Qiyue Lu]

Please ignore the previous thread. By using NVCC, I can append additional
options to CXXPPFLAGS.

Thanks

On Thu, Jul 11, 2024 at 2:28 PM Qiyue Lu <qiyuelu1 at gmail.com> wrote:

> Thanks, it works with appending to LDFLAGS.
> May I know how to add additional CPP options? It seems manually adding to
> CXXFLAGS, CPPFLAGS and CXXPPFLAGS won't work in the makefile.
>
> Qiyue Lu
>
> On Tue, Jul 9, 2024 at 6:34 PM Satish Balay <balay.anl at fastmail.org>
> wrote:
>
>> And sometimes you might need to list these additional libraries/options
>> after PETSc libraries - in the link command. One way:
>>
>> balay at pj01:~/test$ cat makefile
>>
>> include ${PETSC_DIR}/lib/petsc/conf/variables
>> include ${PETSC_DIR}/lib/petsc/conf/rules
>> LDLIBS += -foobar
>>
>> balay at pj01:~/test$ make ex2
>> mpicxx -Wall -Wwrite-strings -Wno-strict-aliasing -Wno-unknown-pragmas
>> -Wno-lto-type-mismatch -Wno-psabi -fstack-protector -fvisibility=hidden -g
>> -O0  -I/home/balay/petsc/include
>> -I/home/balay/petsc/arch-linux-c-debug/include     ex2.cpp
>> -Wl,-rpath,/home/balay/petsc/arch-linux-c-debug/lib
>> -L/home/balay/petsc/arch-linux-c-debug/lib
>> -Wl,-rpath,/software/mpich-4.1.1/lib -L/software/mpich-4.1.1/lib
>> -Wl,-rpath,/usr/lib/gcc/x86_64-redhat-linux/13
>> -L/usr/lib/gcc/x86_64-redhat-linux/13 -lpetsc -llapack -lblas -ltriangle
>> -lm -lX11 -lmpifort -lmpi -lgfortran -lm -lgfortran -lm -lgcc_s -lquadmath
>> -lstdc++ -lquadmath -foobar -o ex2
>> g++: error: unrecognized command-line option ‘-foobar’
>> make: *** [<builtin>: ex2] Error 1
>>
>> Satish
>>
>> On Tue, 9 Jul 2024, Satish Balay wrote:
>>
>> > It depends on your makefile - and how you are over-riding the targets.
>> 1. Why add -rpath to CXXFLAGS, and not LDFLAGS? The following work for me
>> with the default makefile format used by petsc examples
>> > balay@ pj01: ~/test$ ls ex2. cpp makefile
>> > ZjQcmQRYFpfptBannerStart
>> > This Message Is From an External Sender
>> > This message came from outside your organization.
>> >
>> > ZjQcmQRYFpfptBannerEnd
>> >
>> > It depends on your makefile - and how you are over-riding the targets.
>> >
>> > 1. Why add -rpath to CXXFLAGS, and not LDFLAGS?
>> >
>> > The following work for me with the default makefile format used by
>> petsc examples
>> >
>> > balay at pj01:~/test$ ls
>> > ex2.cpp  makefile
>> > balay at pj01:~/test$ cat makefile
>> >
>> > include ${PETSC_DIR}/lib/petsc/conf/variables
>> > include ${PETSC_DIR}/lib/petsc/conf/rules
>> >
>> > balay at pj01:~/test$ make ex2
>> > mpicxx -Wall -Wwrite-strings -Wno-strict-aliasing -Wno-unknown-pragmas
>> -Wno-lto-type-mismatch -Wno-psabi -fstack-protector -fvisibility=hidden -g
>> -O0  -I/home/balay/petsc/include -I/home/balay/petsc/arch-lin
>> > ux-c-debug/include     ex2.cpp
>> -Wl,-rpath,/home/balay/petsc/arch-linux-c-debug/lib
>> -L/home/balay/petsc/arch-linux-c-debug/lib
>> -Wl,-rpath,/software/mpich-4.1.1/lib -L/software/mpich-4.1.1/lib
>> -Wl,-rpath,/usr
>> > /lib/gcc/x86_64-redhat-linux/13 -L/usr/lib/gcc/x86_64-redhat-linux/13
>> -lpetsc -llapack -lblas -ltriangle -lm -lX11 -lmpifort -lmpi -lgfortran -lm
>> -lgfortran -lm -lgcc_s -lquadmath -lstdc++ -lquadmath -o ex2
>> > balay at pj01:~/test$ make clean
>> > balay at pj01:~/test$ make ex2 LDFLAGS=-foobar
>> > mpicxx -Wall -Wwrite-strings -Wno-strict-aliasing -Wno-unknown-pragmas
>> -Wno-lto-type-mismatch -Wno-psabi -fstack-protector -fvisibility=hidden -g
>> -O0  -I/home/balay/petsc/include -I/home/balay/petsc/arch-lin
>> > ux-c-debug/include    -foobar ex2.cpp
>> -Wl,-rpath,/home/balay/petsc/arch-linux-c-debug/lib
>> -L/home/balay/petsc/arch-linux-c-debug/lib
>> -Wl,-rpath,/software/mpich-4.1.1/lib -L/software/mpich-4.1.1/lib -Wl,-rpa
>> > th,/usr/lib/gcc/x86_64-redhat-linux/13
>> -L/usr/lib/gcc/x86_64-redhat-linux/13 -lpetsc -llapack -lblas -ltriangle
>> -lm -lX11 -lmpifort -lmpi -lgfortran -lm -lgfortran -lm -lgcc_s -lquadmath
>> -lstdc++ -lquadmath
>> > -o ex2
>> > g++: error: unrecognized command-line option ‘-foobar’
>> > make: *** [<builtin>: ex2] Error 1
>> > balay at pj01:~/test$ make ex2 CXXFLAGS=-foobar
>> > mpicxx -Wall -Wwrite-strings -Wno-strict-aliasing -Wno-unknown-pragmas
>> -Wno-lto-type-mismatch -Wno-psabi -fstack-protector -fvisibility=hidden -g
>> -O0 -foobar -I/home/balay/petsc/include -I/home/balay/petsc/a
>> > rch-linux-c-debug/include     ex2.cpp
>> -Wl,-rpath,/home/balay/petsc/arch-linux-c-debug/lib
>> -L/home/balay/petsc/arch-linux-c-debug/lib
>> -Wl,-rpath,/software/mpich-4.1.1/lib -L/software/mpich-4.1.1/lib -Wl,-rpa
>> > th,/usr/lib/gcc/x86_64-redhat-linux/13
>> -L/usr/lib/gcc/x86_64-redhat-linux/13 -lpetsc -llapack -lblas -ltriangle
>> -lm -lX11 -lmpifort -lmpi -lgfortran -lm -lgfortran -lm -lgcc_s -lquadmath
>> -lstdc++ -lquadmath
>> > -o ex2
>> > g++: error: unrecognized command-line option ‘-foobar’
>> > make: *** [<builtin>: ex2] Error 1
>> > balay at pj01:~/test$
>> >
>> > Satish
>> >
>> > On Tue, 9 Jul 2024, Qiyue Lu wrote:
>> >
>> > > Hello,
>> > > I am trying to compile a *.cpp code under PETSc environment. An
>> additional
>> > > flag is needed to link the metis partition library.
>> > > ##############
>> > > # This line is necessary for linking, remember need this flag in both
>> > > compiler options and linking options
>> > > LDFLAGS= -fopenmp -lpmix -lmetis
>> > >
>> > > # This line is required for using some 'helper' function like
>> > > cudaErrorCheck from samples suite
>> > > CXXFLAGS +=
>> > >
>> -Wl,-rpath,/sw/spack/deltas11-2023-03/apps/linux-rhel8-zen/gcc-8.5.0/metis-5.1.0-v5iddu2/lib
>> > > # This two lines are required for using PETSc
>> > > include ${PETSC_DIR}/lib/petsc/conf/variables
>> > > include ${PETSC_DIR}/lib/petsc/conf/rules
>> > > ##############
>> > >
>> > > However, adding "CXXFLAGS += -Wl,-rpath, path_to_lib" in the makefile
>> under
>> > > the same directory, is not working. And CPPFLAGS and CXXPPFLAGS won't
>> work
>> > > either. No errors while compiling, but cannot find the metis.o while
>> > > running the binary. Another confusing point is, in the compilation
>> flash
>> > > screen, LDFLAGS options can be found, but CXXFLAGS cannot.
>> > >
>> > > Could you please inform me how to add additional flags in the
>> makefile?
>> > >
>> > > Thanks,
>> > > Qiyue Lu
>> > >
>> >
>> >
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20240711/ae47463a/attachment.html>