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* Major changes in Autoconf 2.53d -*- outline -*-
** Executables
- autoreconf no longer changes the version of the gettext/po/intl
support files. It now adds the files the correspond to the
AM_GNU_GETTEXT_VERSION declared in configure.ac.
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Warning: It now relies on the 'autopoint' program, which is part
of GNU gettext 0.11.4 and newer.
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Please note that you need to have a GNU gettext version that
corresponds at least to the AM_GNU_GETTEXT_VERSION declared
in configure.ac. You can upgrade to newer GNU gettext versions,
though, without needing to change configure.ac.
- The -I DIR or --include=DIR option now appends DIR to the include path
instead of prepending; this is for consistency with other GNU tools.
The new -B DIR or --prepend-include=DIR option has the old behavior.
** Macros
- AC_OUTPUT
Now handles all the gory details about LIBOBJS and LTLIBOBJS.
Please, remove lines such as
# This is necessary so that .o files in LIBOBJS are also
# built via the ANSI2KNR-filtering rules.
LIBOBJS=`echo $LIBOBJS|sed 's/\.o /\$U.o /g;s/\.o$/\$U.o/'`
and read the `AC_LIBOBJ vs LIBOBJS' section. Do not define U in
your Makefiles either.
- AC_CONFIG_LINKS now makes copies if it can't make links.
- AC_FUNC_FNMATCH now tests only for POSIX compatibility, reverting to
Autoconf 2.13 behavior. The new macro AC_FUNC_FNMATCH_GNU also
tests for GNU extensions to fnmatch, and replaces fnmatch if needed.
- AC_FUNC_SETVBUF_REVERSED no longer fails when cross-compiling.
- AC_PROG_CC_STDC is integrated into AC_PROG_CC.
- AC_PROG_F77 default search no longer includes cf77 and cfg77.
- New macros
AC_C_BACKSLASH_A, AC_CONFIG_LIBOBJ_DIR, AC_GNU_SOURCE,
AC_PROG_EGREP, AC_PROG_FGREP, AC_REPLACE_FNMATCH,
AC_FUNC_FNMATCH_GNU, AC_FUNC_REALLOC, AC_TYPE_MBSTATE_T.
- AC_FUNC_GETLOADAVG
looks for getloadavg.c in the CONFIG_LIBOBJ_DIR.
- AC_FUNC_MALLOC
Now defines HAVE_MALLOC to 0 if `malloc' does not work, and asks
for an AC_LIBOBJ replacement.
** Bug fixes
- Spurious complaints from `m4_bmatch' about invalid regular
expressions are suppressed.
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- Empty top_builddirs are properly handled.
- AC_CHECK_MEMBER works correctly when the member is an aggregate.
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- AC_PATH_PROG
Now colon in the optional path arguments are properly handled.
** Improved portability
- Both Autoconf the package, and the scripts it produces, should run
more reliably with Zsh. Bear in mind it is the default Bourne shell
on Darwin.
- Autoconf and the scripts it produces no longer assume the existence of
the obsolescent commands egrep and fgrep.
** Documentation
- Limitations of Make
More of them.
2002-04-22 23:49:55 +08:00
- GNATS
The GNATS base has moved to
http://bugs.gnu.org/cgi-bin/gnatsweb.pl?database=autoconf
** Misc.
- config.log
Now contains the list of ouput variables and files (AC_SUBST,
AC_SUBST_FILES).
2002-03-11 22:38:59 +08:00
* Major changes in Autoconf 2.53
** Requirements
Perl 5.005_03 or later is required: autom4te is written in Perl and is
needed by autoconf. autoheader, autoreconf, ifnames, and autoscan are
rewritten in Perl.
** Documentation
- AC_INIT
Argument requirements, output variables, defined macros.
- M4sugar, M4sh, Autotest
First sketch.
- Double quoting macros
AC_TRY_CPP, AC_TRY_COMPILE, AC_TRY_LINK and AC_TRY_RUN.
- Licensing
The Autoconf manual is now distributed under the terms of the GNU FDL.
- Section `Hosts and Cross-Compilation'
Explains the rationale for the 2.5x changes in the cross-compilation
chain, and in the relationships between build, host, and target
types.
Emphasizes that `cross-compilation' == `--host is given'.
If you are working on compilers etc., be sure to read this section.
- Section `AC_LIBOBJ vs. LIBOBJS'
Explains why assigning LIBOBJS directly is now an error.
Details how to update the code.
** configure
- $LINENO
Now used instead of hard coded line numbers.
This eases the comparison of `configure's, and diminishes the
pressure over control version archives.
Automatic replacement for shells that don't support this feature.
- New output variables
@builddir@, @top_builddir@, @abs_srcdir@, @abs_top_srcdir@, @abs_builddir@,
@abs_top_builddir@.
** Emacs
Autoconf and Autotest modes are provided.
** Executables
- autom4te
New, used by the Autoconf suite to cache and speed up most processing.
- --force, -f
Supported by autom4te, autoconf and autoheader.
- --include, -I
Replaces --autoconf-dir and --localdir in autoconf, autoheader,
autoupdate, and autoreconf.
- autoreconf
No longer passes --cygnus, --foreign, --gnits, --gnu, --include-deps:
automake options are to be given via AUTOMAKE_OPTIONS.
- autoreconf
Runs gettextize and libtoolize when appropriate.
- autoreconf
--m4dir is no longer supported.
- autoreconf
Now runs only in the specified directories, defaulting to `.',
but understands AC_CONFIG_SUBDIRS for dependent directories.
Before, it used to run on all the `configure.ac' found in the
current tree.
Independent packages are properly updated.
** Bug fixes
- The top level $prefix is propagated to the AC_CONFIG_SUBDIRS configures.
- AC_TRY_RUN
Under the user pressure, $? is finally available. Probably a mistake.
- AC_F77_LIBRARY_LDFLAGS now supports the HP/UX f90 compiler.
- Precious variables accumulation
config.status could stack several copies of the precious variables
assignments.
- AC_PATH_PROG and family.
Works properly when given a literal path.
- AC_FUNC_SETPGRP
Somewhere since 2.13, the result had been reversed.
** C Macros
- AC_C_BIGENDIAN supports the cross-compiling case.
- AC_C_BIGENDIAN accepts ACTION-IF-TRUE, ACTION-IF-FALSE, and
ACTION-IF-UNKNOWN arguments. All are facultative, and the default
for ACTION-IF-TRUE is to define WORDS_BIGENDIAN like AC_C_BIGENDIAN
always did.
- AC_C_LONG_DOUBLE now succeeds only if `long double' has more range or
precision than `double'.
** Generic macros
- AC_INIT
It now defines the preprocessor symbols PACKAGE_NAME,
PACKAGE_TARNAME, PACKAGE_VERSION, PACKAGE_STRING, and
PACKAGE_BUGREPORT.
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- AC_INIT
Admits a fourth optional parameter: the tar name.
- AC_CONFIG_COMMANDS, HEADERS, FILES, LINKS.
Provide the user with srcdir, ac_srcdir, ac_top_srcdir, ac_builddir,
ac_top_builddir, ac_abs_srcdir, ac_abs_top_srcdir, ac_abs_builddir,
ac_abs_top_builddir.
- AC_CONFIG_COMMANDS, HEADERS, FILES, LINKS and AC_OUTPUT.
Are much less expensive when using long lists of files.
- AC_PREFIX_PROGRAM
Works with shell variables, and non alphanumeric names.
** Library macros
- AC_FUNC_STRERROR_R now sets STRERROR_R_CHAR_P, not HAVE_WORKING_STRERROR_R,
because POSIX 1003.1-200x draft 7 says strerror_r returns int, not char *.
- AC_FUNC_STRTOD substitutes POW_LIB.
- AC_FUNC_STRNLEN
New.
* Major changes in Autoconf 2.52
** Documentation
- AC_ARG_VAR
- Quadrigraphs
This feature was present in autoconf 2.50 but was not documented.
For example, `@<:@' is translated to `[' just before output. This
is useful when writing strings that contain unbalanced quotes, or
other hard-to-quote constructs.
- m4_pattern_forbid, m4_pattern_allow
- Tips for upgrading from 2.13.
- Using autoscan to maintain a configure.ac.
** Default includes
- Now include stdint.h.
- sys/types.h and sys/stat.h are guarded.
- strings.h is included if available, and not conflicting with string.h.
** Bug fixes
- The test suite is more robust and presents less false failures.
- Invocation of GNU M4 now robust to POSIXLY_CORRECT.
- configure accepts --prefix='' again.
- AC_CHECK_LIB works properly when its first argument is not a
literal.
- HAVE_INTTYPES_H is defined only if not conflicting with sys/types.h.
- build_, host_, and target_alias are AC_SUBST as in 2.13.
- AC_ARG_VAR properly propagates precious variables inherited from the
environment to ./config.status.
- Using --program-suffix/--program-prefix is portable.
- Failures to detect the default compiler's output extension are less
likely.
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- `config.status foo' works properly when `foo' depends on variables
set in an AC_CONFIG_THING INIT-CMD.
- autoheader is more robust to broken input.
2001-07-02 03:41:20 +08:00
- Fixed Fortran name-mangling and link tests on a number of systems,
e.g. NetBSD; see AC_F77_DUMMY_MAIN, below.
** Generic macros
- AC_CHECK_HEADER and AC_CHECK_HEADERS support a fourth argument to
specify pre-includes. In this case, the headers are compiled with
cc, not merely preprocessed by cpp. Therefore it is the _usability_
of a header which is checked for, not just its availability.
- AC_ARG_VAR refuses to run configure when precious variables have
changed.
- Versions of compilers are dumped in the logs.
- AC_CHECK_TYPE recognizes use of `foo_t' as a replacement type.
** Specific Macros
- AC_PATH_XTRA only adds -ldnet to $LIBS if it's needed to link.
- AC_FUNC_WAIT3 and AC_SYS_RESTARTABLE_SYSCALLS are obsoleted.
- AM_FUNC_ERROR_AT_LINE, AM_FUNC_FNMATCH, AM_FUNC_MKTIME,
AM_FUNC_OBSTACK, and AM_FUNC_STRTOD are now activated.
Be sure to read `Upgrading from Version 2.13' to understand why
running `autoupdate' is needed.
2001-07-02 03:41:20 +08:00
- AC_F77_DUMMY_MAIN, AC_F77_MAIN: new macros to detect whether
a main-like routine is required/possible when linking C/C++ with
Fortran. Users of e.g. AC_F77_WRAPPERS should be aware of these.
- AC_FUNC_GETPGRG behaves better when cross-compiling.
2001-05-21 21:30:04 +08:00
* Major changes in Autoconf 2.50
2000-03-28 21:36:43 +08:00
** Lots of bug fixes
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There have been far too many to enumerate them here. Check out
ChangeLog if you really want to know more.
** Improved documentation
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In particular, portability issues are better covered.
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** Use of Automake
All the standard GNU Makefile targets are supported. The layout has
changed: m4/ holds the m4 extensions Autoconf needs for its
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configuration, doc/ contains the documentation, and tests/ contains
the test suite.
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** Man pages are provided
For autoconf, autoreconf, autoupdate, autoheader, autoscan, ifnames,
config.guess, config.sub.
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** autoconf
- --trace
Provides a safe and powerful means to trace the macro uses. This
provide the parsing layer for tools which need to `study'
configure.in.
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- --warnings
Specify what category of warnings should be enabled.
- When recursing into subdirectories, try for configure.gnu before
configure to adapt for packages not using autoconf on case-insensitive
filesystems.
- Diagnostics
More errors are now caught (circular AC_REQUIRE dependencies,
AC_DEFINE in the action part of an AC_CACHE_CHECK, too many pops
etc.). In addition, their location and call stack are given.
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** autoupdate
autoupdate is much more powerful, and is able to provide the glue code
which might be needed to move from an old macro to its newer
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equivalent.
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You are strongly encouraged to use it to modernize both your
`configure.in' and your .m4 extension files.
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** autoheader
The internal machinery of autoheader has completely changed. As a
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result, using `acconfig.h' should be considered to be obsoleted, and
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you are encouraged to get rid of it using the AH macros.
** autoreconf
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Extensive overhaul.
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** Fortran 77 compilers
Globally, the support for Fortran 77 is considerably improved.
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Support for automatically determining a Fortran 77 compiler's
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name-mangling scheme. New CPP macros F77_FUNC and F77_FUNC_ are
provided to wrap C/C++ identifiers, thus making it easier and more
transparent for C/C++ to call Fortran 77 routines, and Fortran 77 to
call C/C++ routines. See the Texinfo documentation for details.
** Test suite
The test suite no longer uses DejaGNU. It should be easy to submit
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test cases in this new framework.
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** configure
- --help, --help=long, -hl
no longer dumps useless items.
- --help=short, -hs
lists only specific options.
- --help=recursive, -hr
displays the help of all the embedded packages.
- Remembers environment variables when reconfiguring.
The previous scheme to set envvar before running configure was
ENV=VAL ./configure
what prevented configure from remembering the environment in which
it was run, therefore --recheck was run in an inconsistent
environment. Now, one should run
./configure ENV=VAR
and then --recheck will work properly. Variables declared with
AC_ARG_VAR are also preserved.
- cross-compilation
$build defaults to `config.guess`, $host to $build, and then $target
to $host.
Cross-compilation is a global status of the package, it no longer
depends upon the current language.
Cross compilation is enabled iff the user specified `--host'.
`configure' now fails if it can't run the executables it compiles,
unless cross-compilation is enabled.
- Cache file
The cache file is disabled by default. The new options
`--config-cache', `-C' set the cache to `config.cache'.
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** config.status
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- faster
Much faster on most architectures.
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- concurrent executions
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It is safe to use `make -j' with config.status.
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- human interface improved
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It is possible to invoke
./config.status foobar
instead of the former form (still valid)
CONFIG_COMMANDS= CONFIG_HEADERS= CONFIG_LINKS= \
CONFIG_FILES=foobar:foo.in:bar.in \
./config.status
The same holds for configuration headers and links.
You can instantiate unknown files and headers:
./config.status --header foo.h:foo.h.in --file bar:baz
- has a useful --help
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- accepts special file name "-" for stdin/stdout
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** Identity Macros
- AC_COPYRIGHT
Specify additional copyright information.
- AC_INIT
Now expects the identity of the package as argument.
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** General changes.
- Uniform quotation
Most macros, if not all, now strictly follow the `one quotation
level' rule. This results in a more predictable expansion.
- AC_REQUIRE
A sly bug in the AC_REQUIRE machinery, which could produce incorrect
configure scripts, was fixed by Axel Thimm.
** Setup Macros
- AC_ARG_VAR
Document and ask for the registration of an envvar.
- AC_CONFIG_SRCDIR
Specifies the file which `configure' should look for when trying to
find the source tree (used to be handled by AC_INIT).
- AC_CONFIG_COMMANDS
To add new actions to config.status. Should be used instead of
AC_OUTPUT_COMMANDS.
- AC_CONFIG_LINKS
Replaces AC_LINK_FILES.
- AC_CONFIG_HEADERS, AC_CONFIG_COMMANDS, AC_CONFIG_SUBDIRS,
AC_CONFIG_LINKS, and AC_CONFIG_FILES
They now obey sh: you should no longer use shell variables as
argument. Instead of
test "$package_foo_enabled" = yes && $my_subdirs="$my_subdirs foo"
AC_CONFIG_SUBDIRS($my_subdirs)
write
if test "$package_foo_enabled" = yes; then
AC_CONFIG_SUBDIRS(foo)
fi
- AC_HELP_STRING
To format an Autoconf macro's help string so that it looks pretty
when the user executes `configure --help'.
** Generic Test Macros
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- AC_CHECK families
The interface of the AC_CHECK families of macros (decl, header,
type, member, func) is now uniform. They support the same set of
default includes.
- AC_CHECK_DECL, AC_CHECK_DECLS
To check whether a symbol is declared.
- AC_CHECK_SIZEOF, AC_C_CHAR_UNSIGNED.
No longer need a cross-compilation default.
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- AC_CHECK_TYPE
The test it performs is much more robust than previously, and makes
it possible to test builtin types in addition to typedefs.
It is now schizophrenic:
- AC_CHECK_TYPE(TYPE, REPLACEMENT)
remains for backward compatibility, but its use is discouraged.
- AC_CHECK_TYPE(TYPE, IF-FOUND, IF-NOT-FOUND, INCLUDES)
behaves exactly like the other AC_CHECK macros.
- AC_CHECK_TYPES
Checks whether given types are supported by the system.
- AC_CHECK_MEMBER, AC_CHECK_MEMBERS
Check for given members in aggregates (e.g., pw_gecos in struct
passwd).
- AC_PROG_CC_STDC
Checks if the compiler supports ISO C, included when needs special
options.
- AC_PROG_CPP
Checking whether the preprocessor indicates missing includes by the
error code. stderr is checked by AC_TRY_CPP only as a fallback.
- AC_LANG
Takes a language as argument and replaces AC_LANG_C,
AC_LANG_CPLUSPLUS and AC_LANG_FORTRAN77.
- AC_LANG_PUSH, AC_LANG_POP
Are preferred to AC_LANG_SAVE, AC_LANG_RESTORE.
** Specific Macros
- AC_FUNC_CHOWN, AC_FUNC_MALLOC, AC_FUNC_STRERROR_R,
AC_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK, AC_FUNC_STAT, AC_FUNC_LSTAT,
AC_FUNC_ERROR_AT_LINE, AC_FUNC_OBSTACK, AC_FUNC_STRTOD, AC_FUNC_FSEEKO.
New.
- AC_FUNC_GETGROUPS
Sets GETGROUPS_LIBS.
- AC_FUNC_GETLOADAVG
Defines `HAVE_STRUCT_NLIST_N_UN_N_NAME' instead of `NLIST_NAME_UNION'.
- AC_PROG_LEX
Now integrates `AC_DECL_YYTEXT' which is obsoleted.
- AC_SYS_LARGEFILE
Arrange for large-file support.
- AC_EXEEXT, AC_OBJEXT
You are no longer expected to use them: their computation is
performed by default.
** C++ compatibility
Every macro has been revisited in order to support at best CC=c++.
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Major changes in Autoconf 2.14:
There was no release of GNU Autoconf 2.14.
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Major changes in Autoconf 2.13:
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* Support for building on Win32 systems where the only available C or
C++ compiler is the Microsoft Visual C++ command line compiler
(`cl'). Additional support for building on Win32 systems which are
using the Cygwin or Mingw32 environments.
* Support for alternative object file and executable file extensions.
On Win32, for example, these are .obj and .exe. These are discovered
using AC_OBJEXT and AC_EXEEXT, which substitute @OBJEXT@ and
@EXEEXT@ in the output, respectively.
* New macros: AC_CACHE_LOAD, AC_CACHE_SAVE, AC_FUNC_SELECT_ARGTYPES,
AC_VALIDATE_CACHED_SYSTEM_TUPLE, AC_SEARCH_LIBS, AC_TRY_LINK_FUNC,
AC_C_STRINGIZE, AC_CHECK_FILE(S), AC_PROG_F77 (and friends).
* AC_DEFINE now has an optional third argument for a description to be
placed in the config header input file (e.g. config.h.in).
* The C++ code fragment compiled for the C++ compiler test had to be
improved to include an explicit return type for main(). This was
causing failures on systems using recent versions of the EGCS C++
compiler.
* Fixed an important bug in AC_CHECK_TYPE that would cause a configure
script to report that `sometype_t' was present when only `type_t'
was defined.
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* Merge of the FSF version of config.guess and config.sub to modernize
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these scripts. Add support for a few new hosts in config.guess.
Incorporate latest versions of install-sh, mkinstalldirs and
texinfo.tex from the FSF.
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* autoreconf is capable of running automake if necessary (and
applicable).
* Support for Fortran 77. See the Texinfo documentation for details.
* Bug fixes and workarounds for quirky bugs in vendor utilities.
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Major changes in Autoconf 2.12:
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* AC_OUTPUT and AC_CONFIG_HEADER can create output files by
concatenating multiple input files separated by colons, like so:
AC_CONFIG_HEADER(config.h:conf.pre:config.h.in:conf.post)
AC_OUTPUT(Makefile:Makefile.in:Makefile.rules)
The arguments may be shell variables, to compute the lists on the fly.
* AC_LINK_FILES and AC_CONFIG_SUBDIRS may be called multiple times.
* New macro AC_OUTPUT_COMMANDS adds more commands to run in config.status.
* Bug fixes.
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Major changes in Autoconf 2.11:
* AC_PROG_CC and AC_PROG_CXX check whether the compiler works.
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They also default CFLAGS/CXXFLAGS to "-g -O2" for gcc, instead of "-g -O".
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* AC_REPLACE_FUNCS defines HAVE_foo if the system has the function `foo'.
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* AC_CONFIG_HEADER expands shell variables in its argument.
* New macros: AC_FUNC_FNMATCH, AC_FUNC_SETPGRP.
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* The "checking..." messages and the source code for test programs that
fail are saved in config.log.
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* Another workaround has been added for seds with small command length limits.
* config.sub and config.guess recognize more system types.
* Bug fixes.
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Major changes in Autoconf 2.10:
1996-05-08 01:19:58 +08:00
* Bug fixes.
* The cache variable names used by `AC_CHECK_LIB(LIB, FUNC, ...)' has
changed: now $ac_cv_lib_LIB_FUNC, previously $ac_cv_lib_LIB.
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Major changes in Autoconfs 2.6 through 2.9:
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1995-11-23 01:42:19 +08:00
* Bug fixes.
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Major changes in Autoconf 2.5:
1995-06-28 03:09:03 +08:00
* New configure options --bindir, --libdir, --datadir, etc., with
corresponding output variables.
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* New macro: AC_CACHE_CHECK, to make using the cache easier.
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* config.log contains the command being run as well as any output from it.
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* AC_CHECK_LIB can check for libraries with "." or "/" or "+" in their name.
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* AC_PROG_INSTALL doesn't cache a path to install-sh, for sharing caches.
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* AC_CHECK_PROG, AC_PATH_PROG, AC_CHECK_PROGS, AC_PATH_PROGS, and
AC_CHECK_TOOL can search a path other than $PATH.
* AC_CHECK_SIZEOF takes an optional size to use when cross-compiling.
1995-06-28 03:09:03 +08:00
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Major changes in Autoconf 2.4:
1995-06-15 11:10:29 +08:00
1995-06-15 11:10:50 +08:00
* Fix a few bugs found by Emacs testers.
1995-06-15 11:10:29 +08:00
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Major changes in Autoconf 2.3:
1995-03-28 07:29:35 +08:00
* Fix the cleanup trap in several ways.
* Handle C compilers that are picky about option placement.
* ifnames gets the version number from the right directory.
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Major changes in Autoconf 2.2:
1995-02-07 07:31:34 +08:00
1995-02-10 06:44:35 +08:00
* The ifnames utility is much faster but requires a "new awk" interpreter.
* AC_CHECK_LIB and AC_HAVE_LIBRARY check and add the new
library before existing libs, not after, in case it uses them.
* New macros: AC_FUNC_GETPGRP, AC_CHECK_TOOL.
* Lots of bug fixes.
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* Many additions to the TODO file :-)
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Major changes in Autoconf 2.1:
1994-11-04 12:19:54 +08:00
* Fix C++ problems.
* More explanations in the manual.
* Fix a spurious failure in the testsuite.
* Clarify some warning messages.
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* autoreconf by default only rebuilds configure and config.h.in files
that are older than any of their particular input files; there is a
--force option to use after installing a new version of Autoconf.
1994-11-04 12:19:54 +08:00
1994-08-13 10:19:11 +08:00
Thanks to everybody who's submitted changes and additions to Autoconf!
1994-09-07 22:08:30 +08:00
I've incorporated many of them, and am still considering others for
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future releases -- but I didn't want to postpone this release indefinitely.
1995-02-07 07:31:34 +08:00
Caution: don't indiscriminately rebuild configure scripts with
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Autoconf version 2. Some configure.in files need minor adjustments to
work with it; the documentation has a chapter on upgrading. A few
configure.in files, including those for GNU Emacs and the GNU C
Library, need major changes because they relied on undocumented
internals of version 1. Future releases of those packages will have
updated configure.in files.
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It's best to use GNU m4 1.3 (or later) with Autoconf version 2.
Autoconf now makes heavy use of m4 diversions, which were implemented
inefficiently in GNU m4 releases before 1.3.
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Major changes in Autoconf 2.0:
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** New copyright terms:
* There are no restrictions on distribution or use of configure scripts.
** Documentation:
* Autoconf manual is reorganized to make information easier to find
and has several new indexes.
* INSTALL is reorganized and clearer and is now made from Texinfo source.
** New utilities:
* autoscan to generate a preliminary configure.in for a package by
scanning its source code for commonly used nonportable functions,
programs, and header files.
* ifnames to list the symbols used in #if and #ifdef directives in a
source tree.
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* autoupdate to update a configure.in to use the version 2 macro names.
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* autoreconf to recursively remake configure and configuration header
files in a source tree.
** Changed utilities:
* autoheader can take pieces of acconfig.h to replace config.h.{top,bot}.
* autoconf and autoheader can look for package-local definition files
in an alternate directory.
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** New macros:
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* AC_CACHE_VAL to share results of tests between configure runs.
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* AC_DEFUN to define macros, automatically AC_PROVIDE them, and ensure
that macros invoked with AC_REQUIRE don't interrupt other macros.
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* AC_CONFIG_AUX_DIR, AC_CANONICAL_SYSTEM, AC_CANONICAL_HOST, AC_LINK_FILES to
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support deciding unguessable features based on the host and target types.
* AC_CONFIG_SUBDIRS to recursively configure a source tree.
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* AC_ARG_PROGRAM to use the options --program-prefix,
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--program-suffix, and --program-transform-name to change the names
of programs being installed.
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* AC_PREFIX_DEFAULT to change the default installation prefix.
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* AC_TRY_COMPILE to compile a test program without linking it.
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* AC_CHECK_TYPE to check whether sys/types.h or stdlib.h defines a given type.
* AC_CHECK_LIB to check for a particular function and library.
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* AC_MSG_CHECKING and AC_MSG_RESULT to print test results, on a single line,
whether or not the test succeeds. They obsolete AC_CHECKING and AC_VERBOSE.
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* AC_SUBST_FILE to insert one file into another.
* AC_FUNC_MEMCMP to check whether memcmp is 8-bit clean.
* AC_FUNC_STRFTIME to find strftime even if it's in -lintl.
* AC_FUNC_GETMNTENT to find getmntent even if it's in -lsun or -lseq.
* AC_HEADER_SYS_WAIT to check whether sys/wait.h is POSIX.1 compatible.
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** Changed macros:
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* Many macros renamed systematically, but old names are accepted for
backward compatibility.
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* AC_OUTPUT adds the "automatically generated" comment to
non-Makefiles where it finds @configure_input@ in an input file, to
support files with various comment syntaxes.
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* AC_OUTPUT does not replace "prefix" and "exec_prefix" in generated
files when they are not enclosed in @ signs.
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* AC_OUTPUT allows the optional environment variable CONFIG_STATUS to
override the file name "config.status".
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* AC_OUTPUT takes an optional argument for passing variables from
configure to config.status.
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* AC_OUTPUT and AC_CONFIG_HEADER allow you to override the input-file names.
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* AC_OUTPUT automatically substitutes the values of CFLAGS, CXXFLAGS,
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CPPFLAGS, and LDFLAGS from the environment.
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* AC_PROG_CC and AC_PROG_CXX now set CFLAGS and CXXFLAGS, respectively.
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* AC_PROG_INSTALL looks for install-sh or install.sh in the directory
specified by AC_CONFIG_AUXDIR, or srcdir or srcdir/.. or
srcdir/../.. by default.
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* AC_DEFINE, AC_DEFINE_UNQUOTED, and AC_SUBST are more robust and smaller.
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* AC_DEFINE no longer prints anything, because of the new result reporting
mechanism (AC_MSG_CHECKING and AC_MSG_RESULT).
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* AC_VERBOSE pays attention to --quiet/--silent, not --verbose.
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* AC_ARG_ENABLE and AC_ARG_WITH support whitespace in the arguments to
--enable- and --with- options.
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* AC_CHECK_FUNCS and AC_CHECK_HEADERS take optional shell commands to
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execute on success or failure.
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* Checking for C functions in C++ works.
** Removed macros:
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* AC_REMOTE_TAPE and AC_RSH removed; too specific to tar and cpio, and
better maintained with them.
* AC_ARG_ARRAY removed because no one was likely using it.
* AC_HAVE_POUNDBANG replaced with AC_SYS_INTERPRETER, which doesn't
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take arguments, for consistency with all of the other specific checks.
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** New files:
* Comes with config.sub and config.guess, and uses them optionally.
* Uses config.cache to cache test results. An alternate cache file
can be selected with the --cache-file=FILE option.
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* Uses optional shell scripts $prefix/share/config.site and
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$prefix/etc/config.site to perform site or system specific initializations.
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* configure saves compiler output to ./config.log for debugging.
* New files autoconf.m4 and autoheader.m4 load the other Autoconf macros.
* acsite.m4 is the new name for the system-wide aclocal.m4.
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* Has a DejaGnu test suite.
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Major changes in Autoconf 1.11:
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* AC_PROG_INSTALL calls install.sh with the -c option.
* AC_SET_MAKE cleans up after itself.
* AC_OUTPUT sets prefix and exec_prefix if they weren't set already.
* AC_OUTPUT prevents shells from looking in PATH for config.status.
Plus a few other bug fixes.
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Major changes in Autoconf 1.10:
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* autoheader uses config.h.bot if present, analogous to config.h.top.
* AC_PROG_INSTALL looks for install.sh in srcdir or srcdir/.. and
never uses cp.
* AC_PROG_CXX looks for cxx as a C++ compiler.
Plus several bugs fixed.
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Major changes in Autoconf 1.9:
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* AC_YYTEXT_POINTER replaces AC_DECLARE_YYTEXT.
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* AC_SIZEOF_TYPE generates the cpp symbol name automatically,
and autoheader generates entries for those names automatically.
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* AC_FIND_X gets the result from xmkmf correctly.
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* AC_FIND_X assumes no X if --without-x was given.
* AC_FIND_XTRA adds libraries to the variable X_EXTRA_LIBS.
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* AC_PROG_INSTALL finds OSF/1 installbsd.
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Major changes in Autoconf 1.8:
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** New macros:
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* New macros AC_LANG_C, AC_LANG_CPLUSPLUS, AC_LANG_SAVE, AC_LANG_RESTORE,
AC_PROG_CXX, AC_PROG_CXXCPP, AC_REQUIRE_CPP
for checking both C++ and C features in one configure script.
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* New macros AC_CHECKING, AC_VERBOSE, AC_WARN, AC_ERROR for printing messages.
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* New macros AC_FIND_XTRA, AC_MMAP, AC_SIZEOF_TYPE, AC_PREREQ,
AC_SET_MAKE, AC_ENABLE.
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** Changed macros:
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* AC_FIND_X looks for X in more places.
* AC_PROG_INSTALL defaults to install.sh instead of cp, if it's in srcdir.
install.sh is distributed with Autoconf.
* AC_DECLARE_YYTEXT has been removed because it can't work, pending
a rewrite of quoting in AC_DEFINE.
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* AC_OUTPUT adds its comments in C format when substituting in C files.
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* AC_COMPILE_CHECK protects its ECHO-TEXT argument with double quotes.
** New or changed command line options:
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* configure accepts --enable-FEATURE[=ARG] and --disable-FEATURE options.
* configure accepts --without-PACKAGE, which sets withval=no.
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* configure accepts --x-includes=DIR and --x-libraries=DIR.
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* Giving --with-PACKAGE no argument sets withval=yes instead of withval=1.
* configure accepts --help, --version, --silent/--quiet, --no-create options.
* configure accepts and ignores most other Cygnus configure options, and
warns about unknown options.
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* config.status accepts --help, --version options.
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** Paths and other changes:
* Relative srcdir values are not made absolute.
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* The values of @prefix@ and @exec_prefix@ and @top_srcdir@ get substituted.
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* Autoconf library files are installed in ${datadir}/autoconf, not ${datadir}.
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* autoheader optionally copies config.h.top to the beginning of config.h.in.
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* The example Makefile dependencies for configure et al. work better.
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* Namespace cleanup: all shell variables used internally by Autoconf
have names beginning with `ac_'.
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More big improvements are in process for future releases, but have not
yet been (variously) finished, integrated, tested, or documented enough
to release yet.
1993-11-19 07:44:09 +08:00
2000-03-28 21:36:43 +08:00
Major changes in Autoconf 1.7:
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* New macro AC_OBSOLETE.
* Bugs in Makefile.in fixed.
* AC_LONG_FILE_NAMES improved.
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Major changes in Autoconf 1.6:
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* New macro AC_LONG_64_BITS.
* Multiple .h files can be created.
* AC_FIND_X looks for X files directly if it doesn't find xmkmf.
* AC_ALLOCA defines C_ALLOCA if using alloca.c.
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* --with-NAME can take a value, e.g., --with-targets=sun4,hp300bsd.
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* Unused --no-create option to configure removed.
* autoheader doesn't change the timestamp of its output file if
the file didn't change.
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* All macros that look for libraries now use AC_HAVE_LIBRARY.
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* config.status checks three optional environment variables to
modify its behavior.
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* The usual bug fixes.
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Major changes in Autoconf 1.5:
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* New macros AC_FIND_X, AC_OFF_T, AC_STAT_MACROS_BROKEN, AC_REVISION.
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* autoconf and autoheader scripts have GNU standards conforming
--version and --help options (they print their message and exit).
* Many bug fixes.
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Major changes in Autoconf 1.4:
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* New macros AC_HAVE_POUNDBANG, AC_TIME_WITH_SYS_TIME, AC_LONG_DOUBLE,
AC_GETGROUPS_T, AC_DEFINE_UNQUOTED.
* autoconf and autoheader use the M4 environment variable to determine the
path of the m4 program to use.
* The --macrodir option to autoconf and autoheader specifies the directory
in which acspecific.m4, acgeneral.m4, etc. reside if not the default.
* autoconf and autoheader can take `-' as their file names, which means to
read stdin as input.
* Resulting configure scripts can take a --verbose option which causes them
to print the results of their tests.
* AC_DEFINE quotes its second argument in such a way that spaces, magic
shell characters, etc. will be preserved during various stages of
expansion done by the shell. If you don't want this, use
AC_DEFINE_UNQUOTED instead.
* Much textual processing done with external calls to tr and sed have been
internalized with builtin m4 `patsubst' and `translit' calls.
* AC_OUTPUT doesn't hardwire the filenames it outputs. Instead, you can
set the shell variables `gen_files' and `gen_config' to the list of
filenames to output.
* AC_DECLARE_YYTEXT does an AC_SUBST of `LEX_OUTPUT_ROOT', which may be
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"lex.yy" or "lexyy", depending on the system.
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* AC_PROGRAMS_CHECK takes an optional third arg. If given, it is used as
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the default value.
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* If AC_ALLOCA chooses alloca.c, it also defines STACK_DIRECTION.
* AC_CONST works much more reliably on more systems.
* Many bug fixes.
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Major changes in Autoconf 1.3:
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configure no longer requires awk for packages that use a config.h.
Support handling --with-PACKAGE options.
New `autoheader' script to create `config.h.in' from `configure.in'.
Ignore troublesome -lucb and -lPW when searching for alloca.
Rename --exec_prefix to --exec-prefix for GNU standards conformance.
Improve detection of STDC library.
Add AC_HAVE_LIBRARY to check for non-default libraries.
Function checking should work with future GNU libc releases.
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Major changes in Autoconf 1.2:
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The --srcdir option is now usually unnecessary.
Add a file containing sample comments describing CPP macros.
A comment in config.status tells which host it was configured on.
Substituted variable values can now contain commas.
Fix bugs in various feature checks.
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Major changes in Autoconf 1.1:
1993-07-14 07:13:25 +08:00
Added AC_STRCOLL macro.
Made AC_GETLOADAVG check for more things.
AC_OUTPUT argument is now optional.
Various bug fixes.
-----
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Copyright (C) 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002
Free Software Foundation, Inc.
This file is part of GNU Autoconf.
GNU Autoconf is free software; you can redistribute it and/or modify
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the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU Autoconf is distributed in the hope that it will be useful,
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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