$FLUPRO = /cvmfs/sft.ihep.su/fluka/fluka2011.2x-linux-gfor64bit-7.3
 now linking 
/cvmfs/sft.ihep.su/fluka/fluka2011.2x-linux-gfor64bit-7.3
gfortran
ar x /cvmfs/sft.ihep.su/fluka/fluka2011.2x-linux-gfor64bit-7.3/libflukahp.a fluka.o
gfortran -msse2 -mfpmath=sse -fPIC -O3 -g -mtune=generic -fexpensive-optimizations -funroll-loops -fstrength-reduce -Wall -Wuninitialized -Wno-tabs -Wline-truncation -Wno-unused-function -Wno-unused-parameter -Wno-unused-dummy-argument -Wno-unused-variable -Wno-conversion -Wunused-label -Waggregate-return -Wcast-align -Wsystem-headers -ftrapping-math -frange-check -fbackslash -fdump-core -fbacktrace -ffpe-trap=invalid,zero,overflow -finit-local-zero -ffixed-form -frecord-marker=4 -funderscoring -fno-automatic -fd-lines-as-comments -fbounds-check -I/cvmfs/sft.ihep.su/fluka/fluka2011.2x-linux-gfor64bit-7.3/flukapro -v -o x_fluka -Xlinker -Map -Xlinker x_fluka.map fluka.o my-mgdraw.o -L/cvmfs/sft.ihep.su/fluka/fluka2011.2x-linux-gfor64bit-7.3 -lflukahp
Driving: gfortran -msse2 -mfpmath=sse -fPIC -O3 -g -mtune=generic -fexpensive-optimizations -funroll-loops -fstrength-reduce -Wall -Wuninitialized -Wno-tabs -Wline-truncation -Wno-unused-function -Wno-unused-parameter -Wno-unused-dummy-argument -Wno-unused-variable -Wno-conversion -Wunused-label -Waggregate-return -Wcast-align -Wsystem-headers -ftrapping-math -frange-check -fbackslash -fdump-core -fbacktrace -ffpe-trap=invalid,zero,overflow -finit-local-zero -ffixed-form -frecord-marker=4 -funderscoring -fno-automatic -fd-lines-as-comments -fbounds-check -I/cvmfs/sft.ihep.su/fluka/fluka2011.2x-linux-gfor64bit-7.3/flukapro -v -o x_fluka -Xlinker -Map -Xlinker x_fluka.map fluka.o my-mgdraw.o -L/cvmfs/sft.ihep.su/fluka/fluka2011.2x-linux-gfor64bit-7.3 -lflukahp -l gfortran -l m -shared-libgcc
Using built-in specs.
COLLECT_GCC=gfortran
COLLECT_LTO_WRAPPER=/cvmfs/sft.ihep.su/gcc/gcc-7.1.0/bin/../libexec/gcc/x86_64-pc-linux-gnu/7.1.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-7.1.0/configure --prefix=/build/pmendez-sftnight/install-gcc710/ --disable-multilib --with-system-zlib --enable-languages=all
Thread model: posix
gcc version 7.1.0 (GCC) 
Reading specs from /cvmfs/sft.ihep.su/gcc/gcc-7.1.0/bin/../lib/gcc/x86_64-pc-linux-gnu/7.1.0/../../../../lib64/libgfortran.spec
rename spec lib to liborig
COLLECT_GCC_OPTIONS='-msse2' '-mfpmath=sse' '-fPIC' '-O3' '-g' '-mtune=generic' '-fexpensive-optimizations' '-funroll-loops' '-Wall' '-Wuninitialized' '-Wno-tabs' '-Wline-truncation' '-Wno-unused-function' '-Wno-unused-parameter' '-Wno-unused-dummy-argument' '-Wno-unused-variable' '-Wno-conversion' '-Wunused-label' '-Waggregate-return' '-Wcast-align' '-Wsystem-headers' '-ftrapping-math' '-frange-check' '-fbackslash' '-fbacktrace' '-ffpe-trap=invalid,zero,overflow' '-finit-local-zero' '-ffixed-form' '-frecord-marker=4' '-funderscoring' '-fno-automatic' '-fd-lines-as-comments' '-fbounds-check' '-I' '/cvmfs/sft.ihep.su/fluka/fluka2011.2x-linux-gfor64bit-7.3/flukapro' '-v' '-o' 'x_fluka' '-L/cvmfs/sft.ihep.su/fluka/fluka2011.2x-linux-gfor64bit-7.3' '-shared-libgcc' '-march=x86-64'
COMPILER_PATH=/cvmfs/sft.ihep.su/gcc/gcc-7.1.0/bin/../libexec/gcc/x86_64-pc-linux-gnu/7.1.0/:/cvmfs/sft.ihep.su/gcc/gcc-7.1.0/bin/../libexec/gcc/
LIBRARY_PATH=/cvmfs/sft.ihep.su/gcc/gcc-7.1.0/bin/../lib/gcc/x86_64-pc-linux-gnu/7.1.0/:/cvmfs/sft.ihep.su/gcc/gcc-7.1.0/bin/../lib/gcc/:/cvmfs/sft.ihep.su/gcc/gcc-7.1.0/bin/../lib/gcc/x86_64-pc-linux-gnu/7.1.0/../../../../lib64/:/lib/../lib64/:/usr/lib/../lib64/:/cvmfs/sft.ihep.su/gcc/gcc-7.1.0/bin/../lib/gcc/x86_64-pc-linux-gnu/7.1.0/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-msse2' '-mfpmath=sse' '-fPIC' '-O3' '-g' '-mtune=generic' '-fexpensive-optimizations' '-funroll-loops' '-Wall' '-Wuninitialized' '-Wno-tabs' '-Wline-truncation' '-Wno-unused-function' '-Wno-unused-parameter' '-Wno-unused-dummy-argument' '-Wno-unused-variable' '-Wno-conversion' '-Wunused-label' '-Waggregate-return' '-Wcast-align' '-Wsystem-headers' '-ftrapping-math' '-frange-check' '-fbackslash' '-fbacktrace' '-ffpe-trap=invalid,zero,overflow' '-finit-local-zero' '-ffixed-form' '-frecord-marker=4' '-funderscoring' '-fno-automatic' '-fd-lines-as-comments' '-fbounds-check' '-I' '/cvmfs/sft.ihep.su/fluka/fluka2011.2x-linux-gfor64bit-7.3/flukapro' '-v' '-o' 'x_fluka' '-L/cvmfs/sft.ihep.su/fluka/fluka2011.2x-linux-gfor64bit-7.3' '-shared-libgcc' '-march=x86-64'
 /cvmfs/sft.ihep.su/gcc/gcc-7.1.0/bin/../libexec/gcc/x86_64-pc-linux-gnu/7.1.0/collect2 --eh-frame-hdr -m elf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2 -o x_fluka /usr/lib/../lib64/crt1.o /usr/lib/../lib64/crti.o /cvmfs/sft.ihep.su/gcc/gcc-7.1.0/bin/../lib/gcc/x86_64-pc-linux-gnu/7.1.0/crtbegin.o -L/cvmfs/sft.ihep.su/fluka/fluka2011.2x-linux-gfor64bit-7.3 -L/cvmfs/sft.ihep.su/gcc/gcc-7.1.0/bin/../lib/gcc/x86_64-pc-linux-gnu/7.1.0 -L/cvmfs/sft.ihep.su/gcc/gcc-7.1.0/bin/../lib/gcc -L/cvmfs/sft.ihep.su/gcc/gcc-7.1.0/bin/../lib/gcc/x86_64-pc-linux-gnu/7.1.0/../../../../lib64 -L/lib/../lib64 -L/usr/lib/../lib64 -L/cvmfs/sft.ihep.su/gcc/gcc-7.1.0/bin/../lib/gcc/x86_64-pc-linux-gnu/7.1.0/../../.. -Map x_fluka.map fluka.o my-mgdraw.o -lflukahp -lgfortran -lm -lgcc_s -lgcc -lquadmath -lm -lgcc_s -lgcc -lc -lgcc_s -lgcc /cvmfs/sft.ihep.su/gcc/gcc-7.1.0/bin/../lib/gcc/x86_64-pc-linux-gnu/7.1.0/crtend.o /usr/lib/../lib64/crtn.o
/usr/bin/ld: BFD version 2.20.51.0.2-5.36.el6 20100205 internal error, aborting at reloc.c line 443 in bfd_get_reloc_size

/usr/bin/ld: Please report this bug.

collect2: error: ld returned 1 exit status