Code generation problem with g++ 7 and g++ 8 on Red Hat Enterprise Linux (RHEL) 7

Issue

• Compilation with g++ 4.8 works, while version 7.3 and 8.3 throw error messages like the following:

  $ g++ --version
  g++ (GCC) 4.8.5 20150623 (Red Hat 4.8.5-36)
  
  $ g++ '-Wno-deprecated' '-Wno-write-strings' '-Wno-int-to-pointer-cast' '-m64' '-g' '-fno-inline' '-fno-omit-frame-pointer' '-fno-builtin' '-std=gnu++11' '-fpermissive' '-fPIC' '-fsanitize=address' '-Wdelete-non-virtual-dtor' '-Wreturn-type' '-Wconversion-null' '-Wuninitialized' '-Wdiv-by-zero' '-Wenum-compare' '-Woverflow' '-Wpointer-arith' '-Wno-narrowing' '-Wno-main' '-Wno-deprecated-declarations' '-Wno-attributes' '-Wno-maybe-uninitialized' -c test.cpp
  
  $ g++ --version
  g++ (GCC) 7.3.1 20180303 (Red Hat 7.3.1-5)
  
  $ /opt/rh/devtoolset-7/root/usr/bin/g++ '-Wno-deprecated' '-Wno-write-strings' '-Wno-int-to-pointer-cast' '-m64' '-g' '-fno-inline' '-fno-omit-frame-pointer' '-fno-builtin' '-std=gnu++11' '-fpermissive' '-fPIC' '-fsanitize=address' '-Wdelete-non-virtual-dtor' '-Wreturn-type' '-Wconversion-null' '-Wuninitialized' '-Wdiv-by-zero' '-Wenum-compare' '-Woverflow' '-Wpointer-arith' '-Wno-narrowing' '-Wno-main' '-Wno-deprecated-declarations' '-Wno-attributes' '-Wno-maybe-uninitialized' -c test.cpp
  
  /tmp/ccYKBy02.s: Assembler messages:
  
  /tmp/ccYKBy02.s:10900: Error: symbol `_ZZZN4mage12NetworkModel10modelQueryERKNS_6ioid_tERK7QStringbS6_PiS6_Ed_NKUlvE_clEvE15qstring_literal' is already defined
  
  /tmp/ccYKBy02.s:10916: Error: symbol `_ZZN4mage12NetworkModel10modelQueryERKNS_6ioid_tERK7QStringbS6_PiS6_Ed_NKUlvE_clEv' is already defined
  
  
  $ /opt/rh/devtoolset-8/root/usr/bin/g++ --version
  g++ (GCC) 8.3.1 20190311 (Red Hat 8.3.1-3)
  
  $ /opt/rh/devtoolset-8/root/usr/bin/g++ '-Wno-deprecated' '-Wno-write-strings' '-Wno-int-to-pointer-cast' '-m64' '-g' '-fno-inline' '-fno-omit-frame-pointer' '-fno-builtin' '-std=gnu++11' '-fpermissive' '-fPIC' '-fsanitize=address' '-Wdelete-non-virtual-dtor' '-Wreturn-type' '-Wconversion-null' '-Wuninitialized' '-Wdiv-by-zero' '-Wenum-compare' '-Woverflow' '-Wpointer-arith' '-Wno-narrowing' '-Wno-main' '-Wno-deprecated-declarations' '-Wno-attributes' '-Wno-maybe-uninitialized' -c test.cpp
  
  /tmp/cccyLgEo.s: Assembler messages:
  
  /tmp/cccyLgEo.s:11389: Error: symbol `_ZZZN4mage12NetworkModel10modelQueryERKNS_6ioid_tERK7QStringbS6_PiS6_Ed_NKUlvE_clEvE15qstring_literal' is already defined
  
  /tmp/cccyLgEo.s:11405: Error: symbol `_ZZN4mage12NetworkModel10modelQueryERKNS_6ioid_tERK7QStringbS6_PiS6_Ed_NKUlvE_clEv' is already defined