[sajid@xrm free_space]$ module list
Currently Loaded Modulefiles:
  1) neovim-0.3.1-gcc-7.3.0-u2fpr73    3) libx11-1.6.5-gcc-7.3.0-fq4iuwd
  2) mpich-3.3-gcc-7.3.0-z5uiwmx       4) petsc-develop-gcc-7.3.0-2u6vuwa
[sajid@xrm free_space]$ spack find -ldfv /2u6
==> 1 installed package
-- linux-rhel7-x86_64 / gcc@7.3.0 -------------------------------
2u6vuwa    petsc@develop%gcc+X clanguage=C +complex+debug+double+hdf5+hypre~int64+metis+mpi~mumps+shared~suite-sparse+superlu-dist~trilinos
ltstvsx        ^hdf5@1.10.4%gcc~cxx~debug+fortran+hl+mpi+pic+shared~szip~threadsafe
z5uiwmx            ^mpich@3.3%gcc device=ch3 +hydra netmod=tcp +pmi+romio~verbs
zzxzx7g            ^numactl@2.0.11%gcc patches=592f30f7f5f757dfc239ad0ffd39a9a048487ad803c26b419e0f96b8cda08c1a
ldu43ta            ^zlib@1.2.11%gcc+optimize+pic+shared
wzqlcij        ^intel-mkl@2019.0.117%gcc~ilp64+shared threads=none
fq4iuwd        ^libx11@1.6.5%gcc
d3iuw3q            ^kbproto@1.0.7%gcc
w3g6d3u            ^libxcb@1.13%gcc
y3isglr                ^libpthread-stubs@0.4%gcc
kv6fes6                ^libxau@1.0.8%gcc
g5w4hfy                    ^xproto@7.0.31%gcc
pogqqdh                ^libxdmcp@1.1.2%gcc
bjaafbg            ^xextproto@7.3.0%gcc
nhgzn4k        ^metis@5.1.0%gcc build_type=Release ~gdb~int64 patches=4991da938c1d3a1d3dea78e49bbebecba00273f98df2a656e38b83d55b281da1,b1225da886605ea558db7ac08dd8054742ea5afe5ed61ad4d0fe7a495b1270d2 ~real64+shared
hw3j2ss        ^parmetis@4.0.3%gcc build_type=RelWithDebInfo ~gdb patches=4f892531eb0a807eb1b82e683a416d3e35154a455274cf9b162fb02054d11a5b,50ed2081bc939269689789942067c58b3e522c269269a430d5d34c00edbc5870,704b84f7c7444d4372cb59cca6e1209df4ef3b033bc4ee3cf50f369bce972a9d +shared
nbssv4a        ^sowing@1.1.25-p1%gcc
cpspq4c        ^superlu-dist@develop%gcc build_type=RelWithDebInfo ~int64+shared

[sajid@xrm free_space]$ make ex_modify
/raid/home/sajid/packages/spack/opt/spack/linux-rhel7-x86_64/gcc-7.3.0/mpich-3.3-z5uiwmx24jylnivuhlnqjjmm674ozj6x/bin/mpicc -o ex_modify.o -c -fPIC     -I/raid/home/sajid/packages/spack/opt/spack/linux-rhel7-x86_64/gcc-7.3.0/petsc-develop-2u6vuwagkoczyvnpsubzrubmtmpfhhkj/include -I/raid/home/sajid/packages/spack/opt/spack/linux-rhel7-x86_64/gcc-7.3.0/superlu-dist-develop-cpspq4ca2hnyvhx4mz7zsupbj3do6md3/include -I/raid/home/sajid/packages/spack/opt/spack/linux-rhel7-x86_64/gcc-7.3.0/hdf5-1.10.4-ltstvsxvyjue2gxfegi4nvr6c5xg3zww/include -I/raid/home/sajid/packages/spack/opt/spack/linux-rhel7-x86_64/gcc-7.3.0/parmetis-4.0.3-hw3j2ss7mjsc5x5f2gaflirnuufzptil/include -I/raid/home/sajid/packages/spack/opt/spack/linux-rhel7-x86_64/gcc-7.3.0/metis-5.1.0-nhgzn4kjskctzmzv35mstvd34nj2ugek/include -I/raid/home/sajid/packages/spack/opt/spack/linux-rhel7-x86_64/gcc-7.3.0/zlib-1.2.11-ldu43taplg2nbkxtem346zq4ibhad64i/include    `pwd`/ex_modify.c
/raid/home/sajid/packages/spack/opt/spack/linux-rhel7-x86_64/gcc-7.3.0/mpich-3.3-z5uiwmx24jylnivuhlnqjjmm674ozj6x/bin/mpicc -fPIC    -o ex_modify ex_modify.o  -Wl,-rpath,/raid/home/sajid/packages/spack/opt/spack/linux-rhel7-x86_64/gcc-7.3.0/petsc-develop-2u6vuwagkoczyvnpsubzrubmtmpfhhkj/lib -L/raid/home/sajid/packages/spack/opt/spack/linux-rhel7-x86_64/gcc-7.3.0/petsc-develop-2u6vuwagkoczyvnpsubzrubmtmpfhhkj/lib -Wl,-rpath,/raid/home/sajid/packages/spack/opt/spack/linux-rhel7-x86_64/gcc-7.3.0/superlu-dist-develop-cpspq4ca2hnyvhx4mz7zsupbj3do6md3/lib -L/raid/home/sajid/packages/spack/opt/spack/linux-rhel7-x86_64/gcc-7.3.0/superlu-dist-develop-cpspq4ca2hnyvhx4mz7zsupbj3do6md3/lib -Wl,-rpath,/raid/home/sajid/packages/spack/opt/spack/linux-rhel7-x86_64/gcc-7.3.0/intel-mkl-2019.0.117-wzqlcijwx7odz2x5chembudo5leqpfh2/compilers_and_libraries_2019.0.117/linux/mkl/lib/intel64 -L/raid/home/sajid/packages/spack/opt/spack/linux-rhel7-x86_64/gcc-7.3.0/intel-mkl-2019.0.117-wzqlcijwx7odz2x5chembudo5leqpfh2/compilers_and_libraries_2019.0.117/linux/mkl/lib/intel64 /lib64/libpthread.so /lib64/libm.so /lib64/libdl.so -Wl,-rpath,/raid/home/sajid/packages/spack/opt/spack/linux-rhel7-x86_64/gcc-7.3.0/hdf5-1.10.4-ltstvsxvyjue2gxfegi4nvr6c5xg3zww/lib -L/raid/home/sajid/packages/spack/opt/spack/linux-rhel7-x86_64/gcc-7.3.0/hdf5-1.10.4-ltstvsxvyjue2gxfegi4nvr6c5xg3zww/lib -Wl,-rpath,/raid/home/sajid/packages/spack/opt/spack/linux-rhel7-x86_64/gcc-7.3.0/parmetis-4.0.3-hw3j2ss7mjsc5x5f2gaflirnuufzptil/lib -L/raid/home/sajid/packages/spack/opt/spack/linux-rhel7-x86_64/gcc-7.3.0/parmetis-4.0.3-hw3j2ss7mjsc5x5f2gaflirnuufzptil/lib -Wl,-rpath,/raid/home/sajid/packages/spack/opt/spack/linux-rhel7-x86_64/gcc-7.3.0/metis-5.1.0-nhgzn4kjskctzmzv35mstvd34nj2ugek/lib -L/raid/home/sajid/packages/spack/opt/spack/linux-rhel7-x86_64/gcc-7.3.0/metis-5.1.0-nhgzn4kjskctzmzv35mstvd34nj2ugek/lib -L/raid/home/sajid/packages/spack/opt/spack/linux-rhel7-x86_64/gcc-7.3.0/zlib-1.2.11-ldu43taplg2nbkxtem346zq4ibhad64i/lib -Wl,-rpath,/raid/home/sajid/packages/spack/opt/spack/linux-rhel7-x86_64/gcc-7.3.0/mpich-3.3-z5uiwmx24jylnivuhlnqjjmm674ozj6x/lib -L/raid/home/sajid/packages/spack/opt/spack/linux-rhel7-x86_64/gcc-7.3.0/mpich-3.3-z5uiwmx24jylnivuhlnqjjmm674ozj6x/lib -Wl,-rpath,/raid/home/sajid/packages/spack/opt/spack/linux-rhel7-x86_64/gcc-4.8.5/gcc-7.3.0-qrjpi76aeo4bysagruwwfii6oneh56lj/lib:/raid/home/sajid/packages/spack/opt/spack/linux-rhel7-x86_64/gcc-4.8.5/gcc-7.3.0-qrjpi76aeo4bysagruwwfii6oneh56lj/lib64 -Wl,-rpath,/raid/home/sajid/packages/spack/opt/spack/linux-rhel7-x86_64/gcc-4.8.5/gcc-7.3.0-qrjpi76aeo4bysagruwwfii6oneh56lj/lib/gcc/x86_64-pc-linux-gnu/7.3.0 -L/raid/home/sajid/packages/spack/opt/spack/linux-rhel7-x86_64/gcc-4.8.5/gcc-7.3.0-qrjpi76aeo4bysagruwwfii6oneh56lj/lib/gcc/x86_64-pc-linux-gnu/7.3.0 -Wl,-rpath,/raid/home/sajid/packages/spack/opt/spack/linux-rhel7-x86_64/gcc-4.8.5/gcc-7.3.0-qrjpi76aeo4bysagruwwfii6oneh56lj/lib64 -L/raid/home/sajid/packages/spack/opt/spack/linux-rhel7-x86_64/gcc-4.8.5/gcc-7.3.0-qrjpi76aeo4bysagruwwfii6oneh56lj/lib64 -Wl,-rpath,/raid/home/sajid/packages/spack/opt/spack/linux-rhel7-x86_64/gcc-4.8.5/gcc-7.3.0-qrjpi76aeo4bysagruwwfii6oneh56lj/lib -L/raid/home/sajid/packages/spack/opt/spack/linux-rhel7-x86_64/gcc-4.8.5/gcc-7.3.0-qrjpi76aeo4bysagruwwfii6oneh56lj/lib -lpetsc -lsuperlu_dist -lmkl_intel_lp64 -lmkl_sequential -lmkl_core -lhdf5hl_fortran -lhdf5_fortran -lhdf5_hl -lhdf5 -lparmetis -lmetis -lm -lz -lX11 -lpthread -lstdc++ -ldl -lmpifort -lmpi -lgfortran -lm -lgfortran -lm -lgcc_s -lquadmath -lstdc++ -ldl
/bin/ld: warning: libgfortran.so.3, needed by /usr/lib64/liblapack.so.3, may conflict with libgfortran.so.4
/bin/ld: warning: libgfortran.so.3, needed by /usr/lib64/liblapack.so.3, may conflict with libgfortran.so.4
true ex_modify
rm ex_modify.o
[sajid@xrm free_space]$