Creating and Using Libraries

 

Creating Archive Libraries

 

Figure 5-4 summarizes the procedure for creating archive libraries from

 

three C source files (file1.c, file2.c, and file3.c). The process is

 

identical for other languages, except that you would use a different

 

compiler.

Figure 5-4

Creating an Archive Library

Contents of an Archive File

An archive library file consists of four main pieces:

1.a header string, "!<arch>\n", identifying the file as an archive file created by ar (\n represents the newline character)

2.a symbol table, used by the linker and other commands to find the location, size, and other information for each routine or data item contained in the library

3.an optional string table used by the linker to store file names that are greater than 15 bytes long (only created if a long file name is encountered)

4.object modules, one for each object file specified on the ar command line

To see what object modules a library contains, run ar with the t key, which displays a table of contents. For example, to view the “table of contents” for libm.a:

$ ar t /usr/lib/libm.a

Run ar with the t key.

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Chapter 5

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Kenwood HP 9000 manual Contents of an Archive File

HP 9000 specifications

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