Cross-Compiled Linux From Scratch - Sysroot - Version SVN-0.0.1-20090726-ARM

Chapter 6. Installing Basic System Software

6.25. Readline-6.0

The Readline package is a set of libraries that offers command-line editing and history capabilities.

6.25.1. Environment Settings

This package requires compiler variables to be set for the target in the environment.

export CC="${CLFS_TARGET}-gcc"
export CXX="${CLFS_TARGET}-g++"
export AR="${CLFS_TARGET}-ar"
export AS="${CLFS_TARGET}-as"
export RANLIB="${CLFS_TARGET}-ranlib"
export LD="${CLFS_TARGET}-ld"
export STRIP="${CLFS_TARGET}-strip"

6.25.2. Installation of Readline

The following patch contains updates from the maintainer. The maintainer of Readline only releases these patches to fix serious issues:

patch -Np1 -i ../readline-6.0-branch_update-1.patch

This option forces Readline to link against the libncursesw library:

sed -i 's:^SHLIB_LIBS=:SHLIB_LIBS=-lncursesw:' support/shobj-conf

Prepare Readline for compilation:

./configure --build=${CLFS_HOST} --host=${CLFS_TARGET} \
    --prefix=/usr --libdir=/lib

Compile the package:

make

Install the package:

make DESTDIR=${CLFS} install

Install the documentation:

make DESTDIR=${CLFS} install-doc

Now move the static libraries to a more appropriate location:

mv -v ${CLFS}/lib/lib{readline,history}.a ${CLFS}/usr/lib

Next, remove the .so files in /lib and relink them into /usr/lib.

rm -v ${CLFS}/lib/lib{readline,history}.so
ln -sfv ../../lib/libreadline.so.6 ${CLFS}/usr/lib/libreadline.so
ln -sfv ../../lib/libhistory.so.6 ${CLFS}/usr/lib/libhistory.so

6.25.3. Contents of Readline

Installed libraries: libhistory.[a,so], and libreadline.[a,so]

Short Descriptions

libhistory

Provides a consistent user interface for recalling lines of history

libreadline

Aids in the consistency of user interface across discrete programs that need to provide a command line interface