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-*- outline -*-
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Things it might be nice to do someday:
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* Make AC_CHECK_LIB check whether the function is already available
before checking for the library. This might involve adding another
kind of cache variable to indicate whether a given function needs a
given library. The current ac_cv_func_ variables are intended to
indicate whether the function is in the default libraries, but
actually also take into account whatever value LIBS had when they
were checked for.
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* Add AC_PROG_CC_POSIX to replace the current ad-hoc macros for AIX,
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Minix, ISC, etc.
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* Use AC_EGREP_CPP instead of AC_TRY_LINK to detect structures and members.
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* Make AC_CHECK_FUNC[S] automatically use any particular macros for the
listed functions.
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* Select the right CONFIG_SHELL automatically (for Ultrix, Lynx especially.)
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* Doc: Add index of concepts.
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* Doc: Centralize information on POSIX, MS-DOS, cross-compiling, and
other important topics.
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* Doc: Discuss what Autoconf doesn't do: Makefile rules and
boilerplate, providing replacement C headers and library functions
(a consistent ANSI C/POSIX.1 environment). Lessons learned.
Advantages to not requiring special external libraries or config
files or programs.
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1994-09-01 12:59:32 +08:00
* Split up AC_SUBST substitutions using a loop to accomodate shells
with severely limited here document sizes, if it turns out to be a problem.
I'm not sure whether the limit is on lines or bytes; if bytes, it
will be less of a problem than it was with the long lines used for
creating a header file.
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* Allow [ and ] in egrep patterns and AC_DEFINE args.
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* Supply a template Makefile.in that people can adapt (what GNU hello
was going to be).
** Have CC, DEFS, etc. substitutions.
** Support all of the GNU standard targets.
** Parameterize with make variables to require as little modification
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as necessary. Maybe via m4? (Eww, sounds like imake.)
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** Make it usable both with and without a header file.
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* Mike Haertel's suggestions.
** Provide a file containing decls for alloca, strings, etc. acdecls.h?
** Cross compiling:
*** Error messages include instructions for overriding defaults using
config.site.
*** Distribute a config.site corresponding to a hypothetical bare POSIX system with c89.
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*** Cache consistency checking: ignore cache if environment
(CC or PATH) differs.
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** Site defaults:
*** Convention for consistency checking of env vars and options in config.site so config.site can print obnoxious messages if it doesn't like options or env vars that users use.
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* autoscan: Tell the files that caused inclusion of each macro,
in a dnl comment. (Seems to be hard.)
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* Look at user contributed macros: prototypes, IEEE double precision math,
shared libraries, various other things.
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* Test suite: more things to test:
** That the shell scripts produce correct output on some simple data.
** Configuration header files. That autoheader does the right thing,
and so does AC_CONFIG_HEADER when autoconf is run.
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