Linker Tasks

Using Linker commands

As mentioned previously in the section “Exporting Symbols from main with -E”, the -Eoption forces the export of all symbols from the program, regardless of whether they are referenced by shared libraries on the linker command line. The +e option allows you to be more selective in what symbols are exported. You can use +e to limit the exported symbols to only those symbols you want to be visible.

For example, the following ld command exports the symbols main and foo. The symbol main is referenced by libc. The symbol foo is referenced at run time by an explicitly loaded library not specified at link time:

$ ld /usr/ccs/lib/crt0.o prog.o +e main +e foo -lm -lc -ldld

When using +e, be sure to export any data symbols defined in the program that may also be defined in explicitly loaded libraries. If a data symbol that a shared library imports is not exported from the program file, the program uses its own copy while the shared library uses a different copy if a definition exists outside the program file. In such cases, a shared library might update a global variable needed by the program, but the program would never see the change because it would be referencing its own copy.

One example of a data symbol that should almost always be exported from a program is errno. errno is defined in every shared library and program; if this definition is hidden, the value of errno will not be shared outside of the program in which it is hidden.

Moving Libraries after Linking with +b

A library can be moved even after an application has been linked with it. This is done by providing the executable with a list of directories to search at run time for any required libraries. One way you can store a directory path list in the program is by using the +b path_list linker option.

Note that dynamic path list search works only for libraries specified with -lon the linker command line (for example, -lfoo). It won't work for libraries whose full path name is specified (for example, /usr/contrib/lib/libfoo.sl). However, it can be enabled for such libraries with the -loption to the chatr command (see “Changing a Program's Attributes with chatr(1)” on page 104).

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Kenwood HP 9000 manual Moving Libraries after Linking with +b
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HP 9000 specifications

The Kenwood HP 9000 is a cutting-edge home appliance designed for culinary enthusiasts seeking to elevate their cooking experience. This powerful kitchen machine stands out for its multi-functionality, combining the roles of a food processor, blender, and mixer into one sleek unit.

One of the flagship features of the Kenwood HP 9000 is its robust motor, which delivers exceptional performance across various tasks. With a powerful motor that operates at multiple speeds, users can tackle everything from kneading dough to finely chopping vegetables with ease. The variable speed control allows for precision, ensuring that every ingredient is processed to perfection according to individual preferences.

The HP 9000 comes equipped with a variety of attachments that enhance its versatility. Among these are a stainless-steel mixing bowl, a dough hook, a whisk, and multiple cutting blades. This extensive array of accessories means that users can whip up delightful pastries, create homemade pasta, or prepare smoothies with minimal hassle. Each attachment is designed for easy attachment and removal, making the transition between tasks seamless and efficient.

Another key characteristic of the Kenwood HP 9000 is its advanced safety features. The design incorporates mechanisms that prevent the machine from operating unless all components are securely in place. This not only gives users peace of mind while cooking but also ensures longevity for the appliance, reducing the risk of wear and tear over time.

In terms of design, the HP 9000 is both modern and aesthetically pleasing. Its ergonomic shape and compact size make it easy to store and use in various kitchen settings, while the high-quality materials used in its construction guarantee durability and longevity. The user interface is intuitive, with clearly labeled buttons that facilitate operation, ensuring that even novice cooks can navigate the machine effortlessly.

Additionally, the Kenwood HP 9000 features innovative technologies, such as an integrated digital timer and a pulse function for added control during food preparation. These features enhance cooking precision, allowing users to achieve consistent results every time.

In summary, the Kenwood HP 9000 is an exceptional kitchen appliance that combines power, versatility, and safety. With its advanced features and user-friendly design, it is an ideal choice for anyone looking to simplify their cooking process while achieving professional-level results. Whether you're whipping up a quick meal or tackling an elaborate recipe, the HP 9000 is a reliable companion that will inspire culinary creativity.
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