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73 lines
2.9 KiB
Plaintext
73 lines
2.9 KiB
Plaintext
This directory contains the -liberty library of free software.
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It is a collection of subroutines used by various GNU programs.
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Current members include:
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getopt -- get options from command line
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obstack -- stacks of arbitrarily-sized objects
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strerror -- error message strings corresponding to errno
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strtol -- string-to-long conversion
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strtoul -- string-to-unsigned-long conversion
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We expect many of the GNU subroutines that are floating around to
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eventually arrive here.
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The library must be configured from the top source directory. Don't
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try to run configure in this directory. Follow the configuration
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instructions in ../README.
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Please report bugs to https://gcc.gnu.org/bugzilla/ and send fixes to
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"gcc-patches@gcc.gnu.org". Thank you.
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ADDING A NEW FILE
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=================
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There are two sets of files: Those that are "required" will be
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included in the library for all configurations, while those
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that are "optional" will be included in the library only if "needed."
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To add a new required file, edit Makefile.in to add the source file
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name to CFILES and the object file to REQUIRED_OFILES.
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To add a new optional file, it must provide a single function, and the
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name of the function must be the same as the name of the file.
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* Add the source file name to CFILES in Makefile.in and the object
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file to CONFIGURED_OFILES.
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* Add the function to name to the funcs shell variable in
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configure.ac.
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* Add the function to the AC_CHECK_FUNCS lists just after the
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setting of the funcs shell variable. These AC_CHECK_FUNCS calls
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are never executed; they are there to make autoheader work
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better.
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* Consider the special cases of building libiberty; as of this
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writing, the special cases are newlib and VxWorks. If a
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particular special case provides the function, you do not need
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to do anything. If it does not provide the function, add the
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object file to LIBOBJS, and add the function name to the case
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controlling whether to define HAVE_func.
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Finally, in the build directory of libiberty, configure with
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"--enable-maintainer-mode", run "make maint-deps" to update
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Makefile.in, and run 'make stamp-functions' to regenerate
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functions.texi.
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The optional file you've added (e.g. getcwd.c) should compile and work
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on all hosts where it is needed. It does not have to work or even
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compile on hosts where it is not needed.
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ADDING A NEW CONFIGURATION
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==========================
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On most hosts you should be able to use the scheme for automatically
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figuring out which files are needed. In that case, you probably
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don't need a special Makefile stub for that configuration.
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If the fully automatic scheme doesn't work, you may be able to get
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by with defining EXTRA_OFILES in your Makefile stub. This is
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a list of object file names that should be treated as required
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for this configuration - they will be included in libiberty.a,
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regardless of whatever might be in the C library.
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