[Bug bootstrap/39019] New: Solaris and IRIX libelf cause trouble for build

["ro at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

Despite they seem to have the same interface, the libelf bundled with Solaris
(at
least as far back as Solaris 8) cause trouble:

* The Solaris libelf.h isn't largefile aware:

#if defined(_ILP32) && (_FILE_OFFSET_BITS != 32)
#error "large files are not supported by libelf"
#endif

  This is explained in detail in

 
http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/cmd/sgs/libelf/common/README.LFS

* IRIX 6.5 has libelf.h, too, but lacks gelf.h.

* When I use libelf 0.8.10 instead (installed into /vol/gcc/{include, lib}),
  I have to be very careful: using CPPFLAGS=-I/vol/gcc/include doesn't work
  since libelf.h is preferred and thus the copy in /usr/include is used.  Using
  -I/vol/gcc/include/libelf doesn't work either since gelf.h includes
  libelf/libelf.h which isn't found than.  One needs to use
  -I/vol/gcc/include/libelf -I/vol/gcc/include, which is intricate to get
right.
  I think the use of libelf should be handled similarly to gmp/mpfr via
  --with-libelf or some such.


-- 
           Summary: Solaris and IRIX libelf cause trouble for build
           Product: gcc
           Version: lto
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: dnovillo at gcc dot gnu dot org
        ReportedBy: ro at gcc dot gnu dot org
 GCC build triplet: sparc-sun-solaris2.11
  GCC host triplet: sparc-sun-solaris2.11
GCC target triplet: sparc-sun-solaris2.11


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39019