libgcc: error: conflicting declaration 'typedef enum pointer_t' on yosemite 10.10

[lzkelley (Luke)]

libgcc fails to build on yosemite, the error is:

:info:build /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc49/libgcc/work/gcc-4.9.1/gcc/fortran/module.c:113:1: error: conflicting declaration 'typedef enum pointer_t pointer_t'
:info:build  pointer_t;
:info:build  ^
:info:build In file included from /usr/include/mach/memory_object_types.h:77:0,
:info:build                  from /usr/include/mach/mach_types.h:85,
:info:build                  from /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc49/libgcc/work/build/prev-gcc/include-fixed/malloc.h:37,
:info:build                  from /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc49/libgcc/work/gcc-4.9.1/gcc/system.h:466,
:info:build                  from /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc49/libgcc/work/gcc-4.9.1/gcc/fortran/module.c:68:
:info:build /usr/include/mach/vm_types.h:40:26: note: previous declaration as 'typedef vm_offset_t pointer_t'
:info:build  typedef vm_offset_t      pointer_t;
:info:build                           ^
:info:build make[3]: *** [fortran/module.o] Error 1

[ryandesign (Ryan Carsten Schmidt)]

This is an incomplete log. Please ​clean and try again and attach the new complete log.

[lzkelley (Luke)]

error log

[lzkelley (Luke)]

Replying to ryandesign@…:

This is an incomplete log. Please ​clean and try again and attach the new complete log.

Updated.

[larryv (Lawrence Velázquez)]

Duplicate of #40998.