Error compiling xc7.2.91 on RH linux 6.0

[John Banghart <john@supernet.com>]

I downloaded an unpacked the following 3 files from the ftp site:

xc7dlb.2.91.tgz
xc7src.2.91.tgz
xc7tk.2.91.tgz

I ran configure, then make.  After a while of normal compiling, I got
the following error:

make[1]: Entering directory `/root/xc7.2.91/tcl'
make[2]: Entering directory `/root/xc7.2.91/tcl/unix'
gcc -c -g  -I./../generic -I. -DHAVE_GETCWD=1 -DHAVE_OPENDIR=1
-DHAVE_STRSTR=1 -
DHAVE_STRTOL=1 -DHAVE_TMPNAM=1 -DHAVE_WAITPID=1 -DHAVE_UNISTD_H=1
-DUSE_TERMIOS=
=1 -DNEED_MATHERR=1 -DHAVE_SIGNED_CHAR=1 -DHAVE_SYS_IOCTL_H=1       
-DTCL_SHLIB_EXT=\".so\" ./../generic/tclPosixStr.c
./../generic/tclPosixStr.c: In function `Tcl_ErrnoId':
./../generic/tclPosixStr.c:340: duplicate case value
./../generic/tclPosixStr.c:328: this is the first entry for that value
./../generic/tclPosixStr.c: In function `Tcl_ErrnoMsg':
./../generic/tclPosixStr.c:787: duplicate case value
./../generic/tclPosixStr.c:775: this is the first entry for that value
make[2]: *** [tclPosixStr.o] Error 1
make[2]: Leaving directory `/root/xc7.2.91/tcl/unix'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/root/xc7.2.91/tcl'
make: *** [all-tcl] Error 2 

Is this a known error in Linux?
                                                    
-- 
John Banghart (mailto:john@supernet.com, 717-738-7093)
Webmaster, D&E SuperNet   (http://www.supernet.com)
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