while try to rebuild in mock mksh-39-5.el6.src.rpm gives this error:
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==> nl_langinfo(CODESET)... yes
... setmode
$ cc -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m32 -march=i686 -mtune=atom -fasynchronous-unwind-tables -fno-strict-aliasing -fstack-protector-all -
fwrapv -std=gnu99 -Wall -I.  -D_GNU_SOURCE -DHAVE_ATTRIBUTE=1 -DHAVE_ATTRIBUTE_BOUNDED=0 -DHAVE_ATTRIBUTE_USED=1 -DHAVE_SYS_PARAM_H=1 -DHAVE_SYS_MKDEV_H=0 -DHAVE_SYS_MMAN_H=1 -DHAVE_SYS_SYSMACROS_H=1 -DHAVE_
LIBGEN_H=1 -DHAVE_LIBUTIL_H=0 -DHAVE_PATHS_H=1 -DHAVE_STDBOOL_H=1 -DHAVE_STRINGS_H=1 -DHAVE_GRP_H=1 -DHAVE_ULIMIT_H=1 -DHAVE_VALUES_H=1 -DHAVE_STDINT_H=1 -D_FILE_OFFSET_BITS=64 -DHAVE_RLIM_T=1 -DHAVE_SIG_T=1
 -DHAVE_SYS_SIGNAME=0 -DHAVE_SYS_SIGLIST=1 -DHAVE_STRSIGNAL=0 -DHAVE_ARC4RANDOM=0 -DHAVE_ARC4RANDOM_PUSHB=0 -DHAVE_GETRUSAGE=1 -DHAVE_KILLPG=1 -DHAVE_MKNOD=1 -DHAVE_MKSTEMP=1 -DHAVE_NICE=1 -DHAVE_REALPATH=1
-DHAVE_REVOKE=0 -DHAVE_SETLOCALE_CTYPE=1 -DHAVE_LANGINFO_CODESET=1  -Wno-error scn.c  || rm -f ${tcfn}*
] scn.c: In function 'main':
] mirtoconf(8): warning: implicit declaration of function 'getmode'
] mirtoconf(8): warning: implicit declaration of function 'setmode'
] /tmp/ccyzDD2m.o: In function `main':
] /builddir/build/BUILD/mksh-39/scn.c:8: undefined reference to `setmode'
] /builddir/build/BUILD/mksh-39/scn.c:8: undefined reference to `getmode'
] collect2: ld returned 1 exit status
==> setmode... no
... setresugid
$ cc -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m32 -march=i686 -mtune=atom -fasynchronous-unwind-tables -fno-strict-aliasing -fstack-protector-all -
fwrapv -std=gnu99 -Wall -I.  -D_GNU_SOURCE -DHAVE_ATTRIBUTE=1 -DHAVE_ATTRIBUTE_BOUNDED=0 -DHAVE_ATTRIBUTE_USED=1 -DHAVE_SYS_PARAM_H=1 -DHAVE_SYS_MKDEV_H=0 -DHAVE_SYS_MMAN_H=1 -DHAVE_SYS_SYSMACROS_H=1 -DHAVE_
LIBGEN_H=1 -DHAVE_LIBUTIL_H=0 -DHAVE_PATHS_H=1 -DHAVE_STDBOOL_H=1 -DHAVE_STRINGS_H=1 -DHAVE_GRP_H=1 -DHAVE_ULIMIT_H=1 -DHAVE_VALUES_H=1 -DHAVE_STDINT_H=1 -D_FILE_OFFSET_BITS=64 -DHAVE_RLIM_T=1 -DHAVE_SIG_T=1
 -DHAVE_SYS_SIGNAME=0 -DHAVE_SYS_SIGLIST=1 -DHAVE_STRSIGNAL=0 -DHAVE_ARC4RANDOM=0 -DHAVE_ARC4RANDOM_PUSHB=0 -DHAVE_GETRUSAGE=1 -DHAVE_KILLPG=1 -DHAVE_MKNOD=1 -DHAVE_MKSTEMP=1 -DHAVE_NICE=1 -DHAVE_REALPATH=1
-DHAVE_REVOKE=0 -DHAVE_SETLOCALE_CTYPE=1 -DHAVE_LANGINFO_CODESET=1 -DHAVE_SETMODE=0  -Wno-error scn.c  || rm -f ${tcfn}*
==> setresugid... yes
... setgroups
EXCEPTION:
Traceback (most recent call last):
  File "/usr/lib/python2.6/site-packages/mock/trace_decorator.py", line 70, in trace
    result = func(*args, **kw)
  File "/usr/lib/python2.6/site-packages/mock/util.py", line 297, in do
    logger, returnOutput, start, timeout)
  File "/usr/lib/python2.6/site-packages/mock/util.py", line 235, in logOutput
    i_rdy,o_rdy,e_rdy = select.select(fds,[],[],1)
KeyboardInterrupt
LEAVE do --> EXCEPTION RAISED
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