I downloaded the Expect from "http://expect.nist.gov/#unix.". I have the below said header file on my system.

/qawac/home/tbnaadh/tcl/tcl8.5.7/unix/tclUnixPort.h

Why isn't make could not figure out this header file.

---------- Post updated at 11:09 AM ---------- Previous update was at 09:02 AM ----------

Now getting a different error. i have added the absolute path in tclPort.h file as shown below
#if defined(__WIN32__)
# include "tclWinPort.h"
#else
# include "/export/home/tbnaadh/tcl/tcl8.5.7/unix/tclUnixPort.h"
#endif

Now i am getting the below error while "make"

/export/home/tbnaadh/tcl/expect-5.43 $ make

/opt/SUNWspro/WS6U2/bin/acc -c -I. -I. -I/qawac/home/tbnaadh/tcl/tcl8.5.7/generic -DEXP_VERSION=\"5.43.0\" -DSCRIPTDIR=\"/expor
t/home/tbnaadh/tcl/usr/local/lib/expect5.43\" -DEXECSCRIPTDIR=\"/export/home/tbnaadh/tcl/usr/local/lib/expect5.43\" -DTCL_DEBUGGER
-DUSE_NON_CONST -DSTTY_BIN=\"/bin/stty\" -DDFLT_STTY="\"sane\"" exp_inter.c
"exp_inter.c", line 294: undefined symbol: TCL_REG_BOSONLY
"exp_inter.c", line 866: undefined symbol: TCL_REG_BOSONLY
*** Error code 2
make: Fatal error: Command failed for target `exp_inter.o'