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a04993aa1d
(AC_ARG_ENABLE, AC_ARG_WITH): Adjust. * doc/autoconf.texi (Help Formatting): New node. * NEWS: Announce AC_PRESERVE_HELP_ORDER.
1324 lines
47 KiB
Plaintext
1324 lines
47 KiB
Plaintext
* Major changes in Autoconf 2.59c
|
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|
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** The configure command now redirects standard input from /dev/null,
|
||
to help avoid problems with subsidiary commands that might mistakenly
|
||
read standard input. AS_ORIGINAL_STDIN_FD points to the original
|
||
standard input before this redirection, if you really want configure to
|
||
read from standard input.
|
||
|
||
** Directory variables adjusted to recent changes in the GNU Coding Standards.
|
||
The following directory variables are new:
|
||
|
||
datarootdir read-only architecture-independent data root [PREFIX/share]
|
||
localedir locale-specific message catalogs [DATAROOTDIR/locale]
|
||
docdir documentation root [DATAROOTDIR/doc/PACKAGE]
|
||
htmldir html documentation [DOCDIR]
|
||
dvidir dvi documentation [DOCDIR]
|
||
pdfdir pdf documentation [DOCDIR]
|
||
psdir ps documentation [DOCDIR]
|
||
|
||
The following variables have new default values:
|
||
|
||
datadir read-only architecture-independent data [DATAROOTDIR]
|
||
infodir info documentation [DATAROOTDIR/info]
|
||
mandir man documentation [DATAROOTDIR/man]
|
||
|
||
This means that if you use any of `@datadir@', `@infodir@', or
|
||
`@mandir@' in a file, you will have to ensure `${datarootdir}' is
|
||
defined in this file.
|
||
|
||
** @top_builddir@ is now a dir name: it is always nonempty and doesn't have
|
||
a trailing slash. Similar change will be made to ac_top_builddir in a
|
||
future release; the old style value, which matches (../)*, is (and will
|
||
continue to be) available as ac_top_build_prefix.
|
||
|
||
** AC_C_TYPEOF
|
||
New macro to check for support of 'typeof' syntax a la GNU C.
|
||
|
||
** AC_PATH_X
|
||
Now checks for X11/Xlib.h and XrmInitialize (X proper) rather than
|
||
X11/Intrinsic.h and XtMalloc (Xt).
|
||
|
||
** AC_PRESERVE_HELP_ORDER
|
||
New macro that causes `configure' to display help strings for AC_ARG_ENABLE
|
||
and AC_ARG_WITH arguments in one region, in the order defined. The default
|
||
behavior is to group options of each classes separately.
|
||
|
||
** AC_PROG_CC, AC_PROG_CXX
|
||
No longer automatically arrange to declare the 'exit' function of C,
|
||
when a C++ compiler is used. Standard Autoconf macros no longer use
|
||
'exit', so this is no longer an issue for them. If you use C++, and
|
||
want to call 'exit', you'll have to arrange for its declaration
|
||
yourself. But we now suggest you return from 'main' instead.
|
||
|
||
** AC_PROG_CC_C89, AC_PROG_CC_C99
|
||
New macros for ISO C99 support. AC_PROG_CC_C89 and AC_PROG_CC_C99
|
||
check for ANSI C89 and ISO C99 support respectively.
|
||
|
||
** AC_PROG_CC_STDC
|
||
Has been unobsoleted, and will check if the compiler supports ISO
|
||
C99, falling back to ANSI C89 if not. ac_cv_prog_cc_stdc is
|
||
retained for backwards compatibility, assuming the value of
|
||
ac_cv_prog_cc_c99 or ac_cv_prog_cc_c89 (whichever is valid, in
|
||
that order).
|
||
|
||
** AC_SUBST
|
||
The subtituted value can now contain newlines.
|
||
|
||
** AC_SUBST_FILE
|
||
The substitution now occurs only when @variable@ is on a line by itself,
|
||
optionally surrounded by spaces and tabs. The whole line is replaced.
|
||
|
||
** AH_HEADER
|
||
New macro which is defined to the name of the first declared config header
|
||
or undefined if no config headers have been declared yet.
|
||
|
||
** AS_HELP_STRING
|
||
The macro correctly handles quadrigraphs now.
|
||
|
||
** AS_BOURNE_COMPATIBLE, AS_SHELL_SANITIZE, AS_CASE
|
||
These macros are new or published now.
|
||
|
||
** AT_COPYRIGHT
|
||
New macro for copyright notices in testsuite files.
|
||
|
||
** ALLOCA, LIBOBJS, LTLIBOBJS
|
||
Object names added to these variables are now prefixed with `${LIBOBJDIR}',
|
||
as in `${LIBOBJDIR}alloca.o'. LIBOBJDIR is meant to be defined from
|
||
`Makefile.in' in case the object files lie in a different directory.
|
||
|
||
** autoreconf
|
||
Supports --no-recursive now.
|
||
|
||
** New macros to support Erlang/OTP.
|
||
New macros for configuring paths to Erlang tools and libraries:
|
||
AC_ERLANG_PATH_ERLC, AC_ERLANG_NEED_ERLC, AC_ERLANG_PATH_ERL,
|
||
AC_ERLANG_NEED_ERL, AC_ERLANG_CHECK_LIB, AC_ERLANG_SUBST_ROOT_DIR,
|
||
AC_ERLANG_SUBST_LIB_DIR.
|
||
|
||
New macros for configuring installation of Erlang libraries:
|
||
AC_ERLANG_SUBST_INSTALL_LIB_DIR, AC_ERLANG_SUBST_INSTALL_LIB_SUBDIR.
|
||
|
||
** New macros to support Objective C.
|
||
AC_PROG_OBJC, AC_PROG_OBJCPP.
|
||
|
||
* Major changes in Autoconf 2.59b
|
||
|
||
Released 2004-08-20, by Paul Eggert.
|
||
|
||
** AC_CHECK_ALIGNOF
|
||
New macro that computes the default alignment of a type.
|
||
|
||
** AC_CHECK_TOOL, AC_PATH_TOOL, AC_CHECK_TOOLS
|
||
When cross-compiling, these macros will give a warning if the tool
|
||
is not prefixed. In the future, unprefixed cross tools will not
|
||
be detected; please consult the info documentation for information
|
||
about the reason of this change.
|
||
|
||
** AC_CHECK_TARGET_TOOL, AC_PATH_TARGET_TOOL, AC_CHECK_TARGET_TOOLS
|
||
New macros that detect programs whose name is prefixed with the
|
||
target type, if the build type and target type are different.
|
||
|
||
** AC_REQUIRE_AUX_FILE
|
||
New trace macro that declares expected auxiliary files.
|
||
|
||
** AC_PROG_GREP
|
||
New macro that tests for a grep program that accepts as a long a line
|
||
as possible.
|
||
|
||
** AC_PROG_EGREP, AC_PROG_FGREP
|
||
These macros now require AC_PROG_GREP, and try EGREP="$GREP -E" and
|
||
FGREP="$GREP -F" respectively if possible, or else run a path search for
|
||
a program that accepts as long a line as possible.
|
||
|
||
** AC_PROG_SED
|
||
New macro that tests for a sed program that truncates as few characters
|
||
as possible.
|
||
|
||
* Major changes in Autoconf 2.59
|
||
|
||
Released 2003-11-04, by Akim Demaille
|
||
|
||
** ac_abs_builddir etc.
|
||
Absolute file names were actually relative in 2.58.
|
||
|
||
* Major changes in Autoconf 2.58
|
||
|
||
Released 2003-11-04, by Akim Demaille
|
||
|
||
** core.*
|
||
core.* files are no longer removed, as they may be valid user files.
|
||
|
||
** autoreconf and auxiliary directory
|
||
Autoreconf creates the auxiliary directory if needed. This is
|
||
especially useful for initial "bootstrapping" of fresh CVS checkouts.
|
||
|
||
** AC_CONFIG_MACRO_DIR
|
||
Use this macro to declare the directory for local m4 macros for aclocal.
|
||
|
||
** AC_LIBOBJS
|
||
No longer includes twice the same file in LIBOBJS if invoked
|
||
multiple times.
|
||
|
||
** AC_CONFIG_COMMANDS
|
||
The directory for its first argument is automatically created. For
|
||
instance, with
|
||
|
||
AC_CONFIG_COMMANDS([src/modules.hh], [...])
|
||
|
||
$top_builddir/src/ is created if needed.
|
||
|
||
** Autotest and local.at
|
||
The optional file local.at is always included in Autotest test suites.
|
||
|
||
** Warnings
|
||
The warnings are always issued, including with cached runs.
|
||
This became a significant problem since aclocal and automake can
|
||
run autoconf behind the scene.
|
||
|
||
** autoheader warnings
|
||
The warnings of autoheader can be turned off, using --warning.
|
||
For instance, -Wno-obsolete disables the complaints about acconfig.h
|
||
and other deprecated constructs.
|
||
|
||
** New macros
|
||
AC_C_RESTRICT, AC_INCLUDES_DEFAULT, AC_LANG_ASSERT, AC_LANG_WERROR,
|
||
AS_SET_CATFILE.
|
||
|
||
** AC_DECL_SYS_SIGLIST
|
||
Works again.
|
||
|
||
** AC_FUNC_MKTIME
|
||
Now checks that mktime is the inverse of localtime.
|
||
|
||
** Improve DJGPP portability
|
||
The Autoconf tools and configure behave better under DJGPP.
|
||
|
||
** Present But Cannot Be Compiled
|
||
New FAQ section dedicated to the mystic
|
||
|
||
configure: WARNING: pi.h: present but cannot be compiled
|
||
configure: WARNING: pi.h: check for missing prerequisite headers?
|
||
configure: WARNING: pi.h: proceeding with the preprocessor's result
|
||
messages.
|
||
|
||
** Concurrent executions of autom4te
|
||
autom4te now locks its internal files, which enables concurrent
|
||
executions of autom4te, likely to happen if automake, autoconf,
|
||
autoheader etc. are run simultaneously.
|
||
|
||
** Libtool
|
||
Use of Libtool 1.5 and higher is encouraged. Compatibility with
|
||
Libtool pre-1.4 is not checked.
|
||
|
||
** Autotest
|
||
Testsuites no longer rerun failed tests in verbose mode; instead,
|
||
failures are logged while the test is run.
|
||
|
||
In addition, expected failures can be marked as such.
|
||
|
||
* Major changes in Autoconf 2.57
|
||
|
||
Released 2002-12-03 by Paul Eggert.
|
||
|
||
Bug fixes for problems with AIX linker, with freestanding C compilers,
|
||
with GNU m4 limitations, and with obsolete copies of GNU documents.
|
||
|
||
The Free Documentation License has been upgraded from 1.1 to 1.2.
|
||
|
||
* Major changes in Autoconf 2.56
|
||
|
||
Released 2002-11-15 by Akim Demaille.
|
||
|
||
One packaging problem fixed (config/install-sh was not executable).
|
||
|
||
* Major changes in Autoconf 2.55
|
||
|
||
Released 2002-11-14 by Akim Demaille.
|
||
|
||
Release tips:
|
||
|
||
Have your configure.ac checked by autoscan ("autoscan").
|
||
Try the warning options ("autoreconf -fv -Wall").
|
||
|
||
** Documentation
|
||
|
||
- AC_CHECK_HEADER, AC_CHECK_HEADERS
|
||
More information on proper use.
|
||
|
||
- Writing Test Programs
|
||
|
||
This sections explains how to write good test sources to use with
|
||
AC_COMPILE_IFELSE etc. It documents AC_LANG_PROGRAM and so forth.
|
||
|
||
- AC_FOO_IFELSE vs. AC_TRY_FOO
|
||
|
||
Explains why Autoconf moves from AC_TRY_COMPILE etc. to
|
||
AC_COMPILE_IFELSE and AC_LANG_PROGRAM etc.
|
||
|
||
** autoreconf
|
||
|
||
- Is more robust to different Gettext installations.
|
||
|
||
- Produces messages (when --verbose) to be understood by Emacs'
|
||
compile mode.
|
||
|
||
- Supports -W/--warnings.
|
||
|
||
- -m/--make
|
||
Once the GNU Build System reinstalled, run `./config.status
|
||
--recheck && ./config.status && make' if possible.
|
||
|
||
** autom4te
|
||
|
||
- Supports --cache, and --no-cache.
|
||
|
||
- ~/.autom4te.cfg makes it possible to disable the caching mechanism
|
||
(autom4te.cache). See `Customizing autom4te' in the documentation.
|
||
|
||
** config.status
|
||
Supports --quiet.
|
||
|
||
** Obsolete options
|
||
|
||
Support for the obsoleted options -m, --macrodir, -l, --localdir is
|
||
dropped in favor of the safer --include/--prepend-include scheme.
|
||
|
||
** Macros
|
||
|
||
- New macros
|
||
AC_COMPILER_IFELSE, AC_FUNC_MBRTOWC, AC_HEADER_STDBOOL,
|
||
AC_LANG_CONFTEST, AC_LANG_SOURCE, AC_LANG_PROGRAM, AC_LANG_CALL,
|
||
AC_LANG_FUNC_TRY_LINK, AC_MSG_FAILURE, AC_PREPROC_IFELSE.
|
||
|
||
- Obsoleted
|
||
Obsoleted macros are kept for Autoconf backward compatibility, but
|
||
should be avoided in configure.ac. Running autoupdate is advised.
|
||
AC_DECL_SYS_SIGLIST.
|
||
|
||
- AC_DEFINE/AC_DEFINE_UNQUOTED
|
||
|
||
We have to stop using the old compatibility scheme --that tried to
|
||
avoid useless backslashes-- because Libtool 1.4.3 contains a
|
||
|
||
AC_DEFINE([error_t], [int],
|
||
[Define to a type to use for \`error_t' if it is not
|
||
otherwise available.])
|
||
|
||
We have to quote the single quotes and backslashes with \. The old
|
||
compatibility scheme saw that ` was backslashed, and therefore did
|
||
not quote the single quote... Failure. Hence, Autoconf 2.54 is not
|
||
compatible with Libtool. Autoconf 2.55 is, but in some cases might
|
||
produce more \ than wanted.
|
||
|
||
Please, note that in the future the same problem will happen with
|
||
AC_MSG_*: use `autoreconf -f -Wall'.
|
||
|
||
** Bug Fixes
|
||
|
||
- Portability of the Autoconf package to Solaris.
|
||
|
||
- Spurious warnings caused by config.status.
|
||
This bug is benign, but painful: on some systems (typically
|
||
FreeBSD), warnings such as:
|
||
|
||
config.status: creating Makefile
|
||
mv: Makefile: set owner/group (was: 1357/0): Operation not permitted
|
||
|
||
could be issued. This is fixed.
|
||
|
||
- Parallel Builds
|
||
Simultaneous executions of config.status are possible again.
|
||
|
||
- Precious variables accumulation
|
||
|
||
config.status could stack several copies of the precious variables
|
||
assignments.
|
||
|
||
|
||
** Plans for later versions
|
||
|
||
- ./configure <host>
|
||
|
||
The compatibility hooks with the old scheme will be completely
|
||
removed. Please, advice/use `--build', `--host', and `--target'
|
||
only.
|
||
|
||
- AC_CHECK_HEADER, AC_CHECK_HEADERS
|
||
|
||
The tests will be stricter, please make sure your invocations are
|
||
valid.
|
||
|
||
- shell functions
|
||
|
||
Shell functions will gradually be introduced, probably starting with
|
||
Autotest. If you know machines which are in use that you suspect
|
||
*not* to support shell functions, please run the test suite of
|
||
Autoconf 2.55 on it, and report the results to
|
||
bug-autoconf@gnu.org.
|
||
|
||
- AC_MSG_*
|
||
|
||
Special characters in AC_MSG_* need not be quoted. Currently,
|
||
Autoconf has heuristics to decide when a string is escaped, or has
|
||
to be escaped. This scheme is fragile, and will be removed; the
|
||
only risk is uglified messages. Please, run `autoreconf -f -Wall'
|
||
to find occurrences that will be affected.
|
||
|
||
* Major changes in Autoconf 2.54
|
||
|
||
Released 2002-09-13 by Akim Demaille.
|
||
|
||
** 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.
|
||
|
||
Warning: It now relies on the 'autopoint' program, which is part
|
||
of GNU gettext 0.11.4 and newer.
|
||
|
||
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.
|
||
|
||
- Empty top_builddirs are properly handled.
|
||
|
||
- AC_CHECK_MEMBER works correctly when the member is an aggregate.
|
||
|
||
- 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.
|
||
|
||
- GNATS
|
||
The GNATS base moved to
|
||
http://bugs.gnu.org/cgi-bin/gnatsweb.pl?database=autoconf
|
||
(It is no longer available, though.)
|
||
|
||
** Misc.
|
||
|
||
- config.log
|
||
Now contains the list of ouput variables and files (AC_SUBST,
|
||
AC_SUBST_FILES).
|
||
|
||
* Major changes in Autoconf 2.53
|
||
|
||
Released 2002-03-08 by Akim Demaille.
|
||
|
||
** 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.
|
||
|
||
- 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
|
||
|
||
Released 2001-07-18 by Akim Demaille.
|
||
|
||
** 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.
|
||
- `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.
|
||
- 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.
|
||
- 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.
|
||
|
||
* Major changes in Autoconf 2.51
|
||
There was no release of Autoconf 2.51 since some packagers had used
|
||
this version number without permission to ship intermediary versions
|
||
of 2.50. The version was skipped to avoid confusion.
|
||
|
||
* Major changes in Autoconf 2.50
|
||
|
||
Released 2001-05-21 by Akim Demaille.
|
||
|
||
** Lots of bug fixes
|
||
There have been far too many to enumerate them here. Check out
|
||
ChangeLog if you really want to know more.
|
||
|
||
** Improved documentation
|
||
In particular, portability issues are better covered.
|
||
|
||
** Use of Automake
|
||
All the standard GNU Makefile targets are supported. The layout has
|
||
changed: m4/ holds the m4 extensions Autoconf needs for its
|
||
configuration, doc/ contains the documentation, and tests/ contains
|
||
the test suite.
|
||
|
||
** Man pages are provided
|
||
For autoconf, autoreconf, autoupdate, autoheader, autoscan, ifnames,
|
||
config.guess, config.sub.
|
||
|
||
** 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.
|
||
|
||
- --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
|
||
file systems.
|
||
|
||
- 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.
|
||
|
||
** 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
|
||
equivalent.
|
||
|
||
You are strongly encouraged to use it to modernize both your
|
||
`configure.in' and your .m4 extension files.
|
||
|
||
** autoheader
|
||
The internal machinery of autoheader has completely changed. As a
|
||
result, using `acconfig.h' should be considered to be obsoleted, and
|
||
you are encouraged to get rid of it using the AH macros.
|
||
|
||
** autoreconf
|
||
Extensive overhaul.
|
||
|
||
** Fortran 77 compilers
|
||
Globally, the support for Fortran 77 is considerably improved.
|
||
|
||
Support for automatically determining a Fortran 77 compiler's
|
||
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
|
||
test cases in this new framework.
|
||
|
||
** 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'.
|
||
|
||
** config.status
|
||
- faster
|
||
Much faster on most architectures.
|
||
- concurrent executions
|
||
It is safe to use `make -j' with config.status.
|
||
- human interface improved
|
||
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
|
||
- accepts special file name "-" for stdin/stdout
|
||
|
||
|
||
** Identity Macros
|
||
- AC_COPYRIGHT
|
||
Specify additional copyright information.
|
||
|
||
- AC_INIT
|
||
Now expects the identity of the package as argument.
|
||
|
||
** 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
|
||
- 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.
|
||
|
||
- 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++.
|
||
|
||
Major changes in Autoconf 2.14:
|
||
There was no release of GNU Autoconf 2.14.
|
||
|
||
Major changes in Autoconf 2.13:
|
||
|
||
Released 1999-05-01 by Ben Elliston.
|
||
|
||
* 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.
|
||
* Merge of the FSF version of config.guess and config.sub to modernize
|
||
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.
|
||
* 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.
|
||
|
||
Major changes in Autoconf 2.12:
|
||
|
||
Released 1996-11-26 by David J. MacKenzie
|
||
|
||
* 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.
|
||
|
||
Major changes in Autoconf 2.11:
|
||
|
||
Released November 18th, 1996, by David J. MacKenzie
|
||
|
||
* AC_PROG_CC and AC_PROG_CXX check whether the compiler works.
|
||
They also default CFLAGS/CXXFLAGS to "-g -O2" for gcc, instead of "-g -O".
|
||
* AC_REPLACE_FUNCS defines HAVE_foo if the system has the function `foo'.
|
||
* AC_CONFIG_HEADER expands shell variables in its argument.
|
||
* New macros: AC_FUNC_FNMATCH, AC_FUNC_SETPGRP.
|
||
* The "checking..." messages and the source code for test programs that
|
||
fail are saved in config.log.
|
||
* Another workaround has been added for seds with small command length limits.
|
||
* config.sub and config.guess recognize more system types.
|
||
* Bug fixes.
|
||
|
||
Major changes in Autoconf 2.10:
|
||
|
||
Released May 7th, 1996, by Roland McGrath
|
||
|
||
* 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.
|
||
|
||
Major changes in Autoconf 2.9:
|
||
|
||
Released March 16th, 1996, by Roland McGrath
|
||
|
||
* Bug fixes.
|
||
|
||
Major changes in Autoconf 2.8:
|
||
|
||
Released March 8th, 1996, by Roland McGrath
|
||
|
||
* Bug fixes.
|
||
|
||
Major changes in Autoconf 2.7:
|
||
|
||
Released November 22nd, 1995, by David J. MacKenzie
|
||
|
||
* Bug fixes.
|
||
|
||
Major changes in Autoconf 2.6:
|
||
|
||
Released November 20th, 1995, by David J. MacKenzie
|
||
|
||
* Bug fixes.
|
||
|
||
Major changes in Autoconf 2.5:
|
||
|
||
Released November 17th, 1995, by Roland McGrath
|
||
|
||
* New configure options --bindir, --libdir, --datadir, etc., with
|
||
corresponding output variables.
|
||
* New macro: AC_CACHE_CHECK, to make using the cache easier.
|
||
* config.log contains the command being run as well as any output from it.
|
||
* AC_CHECK_LIB can check for libraries with "." or "/" or "+" in their name.
|
||
* AC_PROG_INSTALL doesn't cache a name for install-sh, for sharing caches.
|
||
* 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.
|
||
|
||
Major changes in Autoconf 2.4:
|
||
|
||
Released June 14th, 1995, by David J. MacKenzie
|
||
|
||
* Fix a few bugs found by Emacs testers.
|
||
|
||
Major changes in Autoconf 2.3:
|
||
|
||
Released March 27th, 1995, by David J. MacKenzie
|
||
|
||
* 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.
|
||
|
||
Major changes in Autoconf 2.2:
|
||
|
||
Released March 8th, 1995, by David J. MacKenzie
|
||
|
||
* 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.
|
||
* Many additions to the TODO file :-)
|
||
|
||
Major changes in Autoconf 2.1:
|
||
|
||
Released November 4th, 1994, by David J. MacKenzie
|
||
|
||
* Fix C++ problems.
|
||
* More explanations in the manual.
|
||
* Fix a spurious failure in the testsuite.
|
||
* Clarify some warning messages.
|
||
* 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.
|
||
|
||
Thanks to everybody who's submitted changes and additions to Autoconf!
|
||
I've incorporated many of them, and am still considering others for
|
||
future releases -- but I didn't want to postpone this release indefinitely.
|
||
|
||
Caution: don't indiscriminately rebuild configure scripts with
|
||
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.
|
||
|
||
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.
|
||
|
||
Major changes in Autoconf 2.0:
|
||
|
||
Released October 26th, 1994, by David J. MacKenzie
|
||
|
||
** 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.
|
||
* autoupdate to update a configure.in to use the version 2 macro names.
|
||
* 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.
|
||
|
||
** New macros:
|
||
* AC_CACHE_VAL to share results of tests between configure runs.
|
||
* AC_DEFUN to define macros, automatically AC_PROVIDE them, and ensure
|
||
that macros invoked with AC_REQUIRE don't interrupt other macros.
|
||
* AC_CONFIG_AUX_DIR, AC_CANONICAL_SYSTEM, AC_CANONICAL_HOST, AC_LINK_FILES to
|
||
support deciding unguessable features based on the host and target types.
|
||
* AC_CONFIG_SUBDIRS to recursively configure a source tree.
|
||
* AC_ARG_PROGRAM to use the options --program-prefix,
|
||
--program-suffix, and --program-transform-name to change the names
|
||
of programs being installed.
|
||
* AC_PREFIX_DEFAULT to change the default installation prefix.
|
||
* AC_TRY_COMPILE to compile a test program without linking it.
|
||
* 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.
|
||
* 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.
|
||
* 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.
|
||
|
||
** Changed macros:
|
||
* Many macros renamed systematically, but old names are accepted for
|
||
backward compatibility.
|
||
* 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.
|
||
* AC_OUTPUT does not replace "prefix" and "exec_prefix" in generated
|
||
files when they are not enclosed in @ signs.
|
||
* AC_OUTPUT allows the optional environment variable CONFIG_STATUS to
|
||
override the file name "config.status".
|
||
* AC_OUTPUT takes an optional argument for passing variables from
|
||
configure to config.status.
|
||
* AC_OUTPUT and AC_CONFIG_HEADER allow you to override the input-file names.
|
||
* AC_OUTPUT automatically substitutes the values of CFLAGS, CXXFLAGS,
|
||
CPPFLAGS, and LDFLAGS from the environment.
|
||
* AC_PROG_CC and AC_PROG_CXX now set CFLAGS and CXXFLAGS, respectively.
|
||
* 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.
|
||
* AC_DEFINE, AC_DEFINE_UNQUOTED, and AC_SUBST are more robust and smaller.
|
||
* AC_DEFINE no longer prints anything, because of the new result reporting
|
||
mechanism (AC_MSG_CHECKING and AC_MSG_RESULT).
|
||
* AC_VERBOSE pays attention to --quiet/--silent, not --verbose.
|
||
* AC_ARG_ENABLE and AC_ARG_WITH support whitespace in the arguments to
|
||
--enable- and --with- options.
|
||
* AC_CHECK_FUNCS and AC_CHECK_HEADERS take optional shell commands to
|
||
execute on success or failure.
|
||
* Checking for C functions in C++ works.
|
||
|
||
** Removed macros:
|
||
* 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
|
||
take arguments, for consistency with all of the other specific checks.
|
||
|
||
** 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.
|
||
* Uses optional shell scripts $prefix/share/config.site and
|
||
$prefix/etc/config.site to perform site or system specific initializations.
|
||
* 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.
|
||
* Has a DejaGnu test suite.
|
||
|
||
Major changes in Autoconf 1.11:
|
||
|
||
* 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.
|
||
|
||
Major changes in Autoconf 1.10:
|
||
|
||
* 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.
|
||
|
||
Major changes in Autoconf 1.9:
|
||
|
||
* AC_YYTEXT_POINTER replaces AC_DECLARE_YYTEXT.
|
||
* AC_SIZEOF_TYPE generates the cpp symbol name automatically,
|
||
and autoheader generates entries for those names automatically.
|
||
* AC_FIND_X gets the result from xmkmf correctly.
|
||
* AC_FIND_X assumes no X if --without-x was given.
|
||
* AC_FIND_XTRA adds libraries to the variable X_EXTRA_LIBS.
|
||
* AC_PROG_INSTALL finds OSF/1 installbsd.
|
||
|
||
Major changes in Autoconf 1.8:
|
||
|
||
** New macros:
|
||
* 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.
|
||
* New macros AC_CHECKING, AC_VERBOSE, AC_WARN, AC_ERROR for printing messages.
|
||
* New macros AC_FIND_XTRA, AC_MMAP, AC_SIZEOF_TYPE, AC_PREREQ,
|
||
AC_SET_MAKE, AC_ENABLE.
|
||
|
||
** Changed macros:
|
||
* 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.
|
||
* AC_OUTPUT adds its comments in C format when substituting in C files.
|
||
* AC_COMPILE_CHECK protects its ECHO-TEXT argument with double quotes.
|
||
|
||
** New or changed command line options:
|
||
* configure accepts --enable-FEATURE[=ARG] and --disable-FEATURE options.
|
||
* configure accepts --without-PACKAGE, which sets withval=no.
|
||
* configure accepts --x-includes=DIR and --x-libraries=DIR.
|
||
* 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.
|
||
* config.status accepts --help, --version options.
|
||
|
||
** File names and other changes:
|
||
* Relative srcdir values are not made absolute.
|
||
* The values of @prefix@ and @exec_prefix@ and @top_srcdir@ get substituted.
|
||
* Autoconf library files are installed in ${datadir}/autoconf, not ${datadir}.
|
||
* autoheader optionally copies config.h.top to the beginning of config.h.in.
|
||
* The example Makefile dependencies for configure et al. work better.
|
||
* Namespace cleanup: all shell variables used internally by Autoconf
|
||
have names beginning with `ac_'.
|
||
|
||
More big improvements are in process for future releases, but have not
|
||
yet been (variously) finished, integrated, tested, or documented enough
|
||
to release yet.
|
||
|
||
Major changes in Autoconf 1.7:
|
||
|
||
* New macro AC_OBSOLETE.
|
||
* Bugs in Makefile.in fixed.
|
||
* AC_LONG_FILE_NAMES improved.
|
||
|
||
Major changes in Autoconf 1.6:
|
||
|
||
* 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.
|
||
* --with-NAME can take a value, e.g., --with-targets=sun4,hp300bsd.
|
||
* Unused --no-create option to configure removed.
|
||
* autoheader doesn't change the timestamp of its output file if
|
||
the file didn't change.
|
||
* All macros that look for libraries now use AC_HAVE_LIBRARY.
|
||
* config.status checks three optional environment variables to
|
||
modify its behavior.
|
||
* The usual bug fixes.
|
||
|
||
Major changes in Autoconf 1.5:
|
||
|
||
* New macros AC_FIND_X, AC_OFF_T, AC_STAT_MACROS_BROKEN, AC_REVISION.
|
||
* autoconf and autoheader scripts have GNU standards conforming
|
||
--version and --help options (they print their message and exit).
|
||
* Many bug fixes.
|
||
|
||
Major changes in Autoconf 1.4:
|
||
|
||
* 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
|
||
name 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 file names it outputs. Instead, you can
|
||
set the shell variables `gen_files' and `gen_config' to the list of
|
||
file names to output.
|
||
* AC_DECLARE_YYTEXT does an AC_SUBST of `LEX_OUTPUT_ROOT', which may be
|
||
"lex.yy" or "lexyy", depending on the system.
|
||
* AC_PROGRAMS_CHECK takes an optional third arg. If given, it is used as
|
||
the default value.
|
||
* If AC_ALLOCA chooses alloca.c, it also defines STACK_DIRECTION.
|
||
* AC_CONST works much more reliably on more systems.
|
||
* Many bug fixes.
|
||
|
||
Major changes in Autoconf 1.3:
|
||
|
||
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.
|
||
|
||
Major changes in Autoconf 1.2:
|
||
|
||
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.
|
||
|
||
Major changes in Autoconf 1.1:
|
||
|
||
Added AC_STRCOLL macro.
|
||
Made AC_GETLOADAVG check for more things.
|
||
AC_OUTPUT argument is now optional.
|
||
Various bug fixes.
|
||
|
||
-----
|
||
|
||
Copyright (C) 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002,
|
||
2003, 2004, 2005, 2006 Free Software Foundation, Inc.
|
||
|
||
This file is part of GNU Autoconf.
|
||
|
||
GNU Autoconf is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
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,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with GNU Autoconf; see the file COPYING. If not, write to
|
||
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
|
||
Boston, MA 02110-1301, USA.
|
||
|
||
Local Variables:
|
||
mode: outline
|
||
End:
|