| 1 | This directory contains the -liberty library of free software.
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| 2 | It is a collection of subroutines used by various GNU programs.
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| 3 | Current members include:
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| 4 |
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| 5 | getopt -- get options from command line
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| 6 | obstack -- stacks of arbitrarily-sized objects
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| 7 | strerror -- error message strings corresponding to errno
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| 8 | strtol -- string-to-long conversion
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| 9 | strtoul -- string-to-unsigned-long conversion
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| 10 |
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| 11 | We expect many of the GNU subroutines that are floating around to
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| 12 | eventually arrive here.
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| 13 |
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| 14 | The library must be configured from the top source directory. Don't
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| 15 | try to run configure in this directory. Follow the configuration
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| 16 | instructions in ../README.
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| 17 |
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| 18 | Please report bugs and fixes to "bug-gnu-utils@prep.ai.mit.edu". Thank you.
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| 19 |
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| 20 | ADDING A NEW FILE
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| 21 | =================
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| 22 |
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| 23 | There are two sets of files: Those that are "required" will be
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| 24 | included in the library for all configurations, while those
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| 25 | that are "optional" will be included in the library only if "needed."
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| 26 |
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| 27 | To add a new required file, edit Makefile to add the source file
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| 28 | name to CFILES and the object file to REQUIRED_OFILES.
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| 29 |
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| 30 | To add a new optional file, it must provide a single function, and the
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| 31 | name of the function must be the same as the name of the file.
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| 32 |
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| 33 | * Add the source file name to CFILES.
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| 34 |
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| 35 | * Add the function to name to the funcs shell variable in
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| 36 | configure.in.
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| 37 |
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| 38 | * Add the function to the AC_CHECK_FUNCS lists just after the
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| 39 | setting of the funcs shell variable. These AC_CHECK_FUNCS calls
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| 40 | are never executed; they are there to make autoheader work
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| 41 | better.
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| 42 |
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| 43 | * Consider the special cases of building libiberty; as of this
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| 44 | writing, the special cases are newlib and VxWorks. If a
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| 45 | particular special case provides the function, you do not need
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| 46 | to do anything. If it does not provide the function, add the
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| 47 | object file to LIBOBJS, and add the function name to the case
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| 48 | controlling whether to define HAVE_func.
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| 49 |
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| 50 | The optional file you've added (e.g. getcwd.c) should compile and work
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| 51 | on all hosts where it is needed. It does not have to work or even
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| 52 | compile on hosts where it is not needed.
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| 53 |
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| 54 | ADDING A NEW CONFIGURATION
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| 55 | ==========================
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| 56 |
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| 57 | On most hosts you should be able to use the scheme for automatically
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| 58 | figuring out which files are needed. In that case, you probably
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| 59 | don't need a special Makefile stub for that configuration.
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| 60 |
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| 61 | If the fully automatic scheme doesn't work, you may be able to get
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| 62 | by with defining EXTRA_OFILES in your Makefile stub. This is
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| 63 | a list of object file names that should be treated as required
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| 64 | for this configuration - they will be included in libiberty.a,
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| 65 | regardless of whatever might be in the C library.
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