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