"% tcl Error: Can't find a usable init.tcl in the following directories: $Xilinx/env/TOS/Tcl/dist/export/lib/tcl8.4 $Xilinx/env/TOS/Tcl/dist/export/lib/tcl8.4  

This probably means that Tcl wasn't installed properly.  

while executing "error $msg" (procedure "tclInit" line 42) invoked from within "tclInit"  

while initializing application (Tcl_AppInit?)"

x001:~% git gui
Application initialization failed: Can't find a usable init.tcl in the following
directories:
/tools/xilinx/env/TOS/Tcl/dist/export/lib/tcl8.4 /build/xfndry10/O. 76xd/env/TOS/Tcl/dist/export/lib/tcl8.4

This probably means that Tcl wasn't installed properly.

Error in startup script: invalid command name "tk_messageBox"
while executing
"tk_messageBox -icon error -type ok -title "git-gui: fatal error" -message $ err"
invoked from within
"if {[catch {package require Tcl 8.4} err]
|| [catch {package require Tk 8.4} err]
} {
catch {wm withdraw .}
tk_messageBox \
-icon error \
-typ..."
(file "/ede/git_1.7.5_a/linux.rh5/libexec/git-core/git-gui" line 34).