5.12.2. Contents of Expect
Installed program:
expect
Installed library:
libexpect-5.44.a
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5.12. Expect-5.44.1.15
The Expect package contains a program for carrying out scripted dialogues with other interactive programs.
Approximate build time:
0.1 SBU
Required disk space:
4.1 MB
5.12.1. Installation of Expect
First, apply a patch to remove the dependency on Tk, that may be present on the host but will not be available once we enter the chroot environment:
patch -Np1 -i ../expect-5.44.1.15-no_tk-1.patch
Next, force Expect's configure script to use /bin/stty instead of a /usr/local/bin/stty it may find on the host
system. This will ensure that our test suite tools remain sane for
the final builds of our toolchain:
cp -v configure{,.orig}
sed 's:/usr/local/bin:/bin:' configure.orig > configure
Now prepare Expect for compilation:
./configure --prefix=/tools --with-tcl=/tools/lib \ --with-tclinclude=/tools/include --with-tk=no
The meaning of the configure options:
-
--with-tcl=/tools/lib -
This ensures that the configure script finds the Tcl installation in the temporary tools location instead of possibly locating an existing one on the host system.
-
--with-tclinclude=/tools/include -
This explicitly tells Expect where to find Tcl's internal headers. Using this option avoids conditions where configure fails because it cannot automatically discover the location of Tcl's headers.
-
--with-tk=no -
This tells the configure script not to search for Tk (the Tcl GUI component) or the X Window System libraries, both of which may reside on the host system but will not exist in the temporary environment.
Build the package:
make
Compilation is now complete. As discussed earlier, running the test suite is not mandatory for the temporary tools here in this chapter. To run the Expect test suite anyway, issue the following command:
make test
Note that the Expect test suite is known to experience failures under certain host conditions that are not within our control. Therefore, test suite failures here are not surprising and are not considered critical.
Install the package:
make SCRIPTS="" install
The meaning of the make parameter:
-
SCRIPTS="" -
This prevents installation of the supplementary Expect scripts, which are not needed.