[Bug modula2/108462] New: duplicate install of static libraries

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108462

            Bug ID: 108462
           Summary: duplicate install of static libraries
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: modula2
          Assignee: gaius at gcc dot gnu.org
          Reporter: rguenth at gcc dot gnu.org
  Target Milestone: ---

rguenther@ryzen:/tmp/obj> find ../install -name libm2cor.la                    
../install/lib64/gcc/x86_64-pc-linux-gnu/13.0.1/libm2cor.la
../install/lib64/gcc/x86_64-pc-linux-gnu/13.0.1/m2/m2cor/libm2cor.la
../install/lib64/gcc/x86_64-pc-linux-gnu/13.0.1/32/m2/m2cor/libm2cor.la
rguenther@ryzen:/tmp/obj> find ../install -name libm2cor.a 
../install/lib64/gcc/x86_64-pc-linux-gnu/13.0.1/libm2cor.a
../install/lib64/gcc/x86_64-pc-linux-gnu/13.0.1/m2/m2cor/libm2cor.a
../install/lib64/gcc/x86_64-pc-linux-gnu/13.0.1/32/m2/m2cor/libm2cor.a

both in ../13.0.1/ and ../13.0.1/m2/m2cor/ along .mod/.def files?

They are installed via

toolexeclib_LTLIBRARIES = libm2cor.la

but in addition to that via

install-data-local: force
        mkdir -p $(DESTDIR)$(inst_libdir)/$(MULTIDIR)$(M2LIBDIR)
        $(INSTALL_DATA) .libs/libm2cor.la
$(DESTDIR)$(inst_libdir)/$(MULTIDIR)$(M2LIBDIR)
        chmod 644 $(DESTDIR)$(inst_libdir)/$(MULTIDIR)$(M2LIBDIR)libm2cor.la
        $(INSTALL_DATA) .libs/libm2cor.a
$(DESTDIR)$(inst_libdir)/$(MULTIDIR)$(M2LIBDIR)
        chmod 644 $(DESTDIR)$(inst_libdir)/$(MULTIDIR)$(M2LIBDIR)libm2cor.a
        $(RANLIB) $(DESTDIR)$(inst_libdir)/$(MULTIDIR)$(M2LIBDIR)libm2cor.a

why's that done?  How could I check whether they are necessary or not?