Eric Blake [Sat, 6 Jun 2009 16:38:23 +0000 (10:38 -0600)]
Document fallback behavior of AC_PROG_LEX.
* doc/autoconf.texi (Particular Programs) <AC_PROG_LEX>: Mention
why fallback is :, and that a --version check must be used to
determine whether flex was found.
Reported by Patrick Welche.
Eric Blake [Mon, 4 May 2009 17:00:30 +0000 (11:00 -0600)]
Sanitize more problematic environment variables.
* doc/autoconf.texi (Environment Variable Index): Add more
entries, particularly for precious variables and known culprit
variables. Needed to avoid overfull vbox.
(Special Shell Variables) <CLICOLOR_FORCE, GREP_OPTIONS>: Add
variables known to cause misbehavior.
* lib/m4sugar/m4sh.m4 (_AS_DETECT_BETTER_SHELL): Unset variables
known to cause problems.
* THANKS: Update.
Based on reports from Ilya Bobir and Joey Mingrone.
Ralf Wildenhues [Thu, 21 May 2009 12:18:39 +0000 (14:18 +0200)]
Document VPATH = $(variable) issue in VPATH chapter.
* doc/autoconf.texi (Variables listed in VPATH): New node.
(Top, VPATH and Make): Adjust menus.
(Build Directories): Refer to it.
Prompted by report from Bruno Haible.
Eric Blake [Mon, 4 May 2009 15:41:41 +0000 (09:41 -0600)]
Update uses of all-permissive license.
* ChangeLog: Relicense under GPL.
* ChangeLog.0: Likewise.
* ChangeLog.1: Likewise.
* ChangeLog.2: Likewise.
* THANKS: Likewise.
* m4/m4.m4: Use latest wording of FSF all-permissive license.
* m4/make-case.m4: Likewise.
* doc/install.texi: Likewise.
* tests/statesave.m4: Relicense to match rest of testsuite; this
file does not need all-permissive license since it is not designed
for reuse by other packages.
* BUGS: Relicense under all-permissive license.
* HACKING: Likewise.
* NEWS: Likewise.
* README: Likewise.
* README-alpha: Likewise.
* README-hacking: Likewise.
* TODO: Likewise.
* lib/autoconf/general.m4 (_AC_RUN_LOG_LIMIT, _AC_DO_LIMIT): New
internal macros, equivalent to _AC_RUN_LOG and _AC_DO, but with
an optional additional argument to limit the number of lines of
stderr output logged, defaulting to 10.
* lib/autoconf/c.m4 (AC_PROG_CC, AC_PROG_CXX, AC_PROG_OBJC): Use
_AC_DO_LIMIT for capturing compiler version output. Also test
-qversion, for the IBM xlc compiler.
* lib/autoconf/fortran.m4 (_AC_PROG_FC): Likewise.
* THANKS: Update.
Report by Christian Rössel and John R. Cary against Libtool.
Eric Blake [Thu, 23 Apr 2009 04:06:04 +0000 (22:06 -0600)]
Fix quoting of m4 macros in AT_CHECK.
* lib/autotest/general.m4 (AT_CHECK): Expand prior to adding
escapes, to avoid shell syntax errors caused by late macro
expansion.
* NEWS: Document this change.
* tests/autotest.at (Metacharacters in command from M4 expansion):
New test.
Eric Blake [Fri, 24 Apr 2009 14:46:59 +0000 (08:46 -0600)]
Make AT_CHECK_UNQUOTED more like AC_DEFINE_UNQUOTED.
* lib/autotest/general.m4 (AT_CHECK_NOESCAPE): Keep older,
undocumented semantics, where unbalanced " cannot be used in the
stdout/stderr argument.
(AT_CHECK_UNQUOTED): Treat " in stdout/stderr as a literal, since
the text is used in double-quoted context.
* tests/autotest.at (unquoted output): New test.
* doc/autoconf.texi (Writing Testsuites) <AT_CHECK>: Mention which
shell expansions are handled.
Improve description of AC_PROG_CC_C89 and AC_PROG_CC_C99.
* doc/autoconf.texi (C Compiler): Document that AC_PROG_CC_C89
and AC_PROG_CC_C99 prefer extended over strict conformance modes.
Report by Vincent Lefèvre.
* doc/autoconf.texi (Fortran Compiler, Initialization Macros)
(Limitations of Usual Tools, Pretty Help Strings)
(config.status Invocation): Fix `a' vs. `an' errors.
Report by Eric Blake.
Adjust channel definitions for new Automake `ordered' flag.
* lib/Autom4te/ChannelDefs.pm (Autom4te::ChannelDefs): Set
`ordered' flag to zero for channels `fatal', `automake', and
`verb'. This has currently no effect on actual semantics but
avoids a consistency check needed for Automake's usage of the
Channels.pm code.
Improve and clarify `config.status' usage documentation.
* doc/autoconf.texi (config.status Invocation): Fix markup in
synopsis. Use `tag' instead of `file' notation for the
non-option arguments, to be consistent with the documentation
of the AC_CONFIG_* macros.
* lib/autoconf/status.m4 (_AC_OUTPUT_CONFIG_STATUS): Likewise,
use `tag' notation for non-option arguments.
Report by John Calcote.
Eric Blake [Wed, 15 Apr 2009 01:06:27 +0000 (19:06 -0600)]
Fix yesterday's regression in AS_IF.
* lib/m4sugar/m4sh.m4 (_AS_IF_ELSE): Don't corrupt $? in else
branch; it is up to the user to avoid syntax errors.
* tests/m4sh.at (AS@&t@_IF and AS@&t@_CASE): Adjust test.
Eric Blake [Fri, 10 Apr 2009 20:43:33 +0000 (14:43 -0600)]
Improve documentation related to expanded-before-required.
* doc/autoconf.texi (Expanded Before Required): Add a case study.
(Running the Compiler) <AC_COMPILE_IFELSE>: Remind users that
running a compile test will AC_REQUIRE the compiler check.
(Macro Definitions) <AC_DEFUN>: Contrast AC_DEFUN and m4_define.
(C Compiler) <AC_PROG_CC>: Mention the fact that only first
invocation of this macro checks for $EXEEXT, and that many other
macros use it via AC_REQUIRE.
Reported by Andreas Schwab.
Eric Blake [Fri, 10 Apr 2009 16:56:40 +0000 (10:56 -0600)]
Mention latest rules about make and set -e.
* doc/autoconf.texi (Failure in Make Rules): Posix is now clear
that make must use set -e.
(Limitations of Builtins) <set>: Clarify more about set -e
behavior.
Eric Blake [Fri, 10 Apr 2009 03:45:18 +0000 (21:45 -0600)]
Make AS_IF, AS_CASE, and AS_FOR more robust to blank arguments.
* lib/m4sugar/m4sh.m4 (_AS_CASE, _AS_CASE_DEFAULT, AS_FOR, _AS_IF)
(_AS_IF_ELSE, AS_IF): Avoid syntax error on blank argument,
including a macro with an empty expansion.
* NEWS: Mention this.
* tests/m4sh.at (AS@&t@_IF and AS@&t@_CASE, AS@&t@_FOR): Update
tests.
Reported by Mike Frysinger.
Document awk and config.status line length limitations.
* doc/autoconf.texi (Configuration Actions): The input to
config.status should have reasonable line length.
(Limitations of Usual Tools): Document IRIX, HP-UX awk input
line length limit.
Report by Bruno Haible.
Skip `Multiple languages' test if CC is a C++ compiler.
* tests/compile.at (Multiple languages): Before starting the
test proper, build and run a configure script that tests the
C compiler only, and skips the test if this is found to be a
C++ compiler.
Report by Eric Blake.
Eric Blake [Fri, 10 Apr 2009 12:26:33 +0000 (06:26 -0600)]
Add undocumented _AS_CLEAN_DIR.
* lib/m4sugar/m4sh.m4 (_AS_CLEAN_DIR): New macro; fixes m4 quoting
in previous patch.
* lib/autotest/general.m4 (AT_INIT) <at_fn_group_prepare>: Use new
macro.
* tests/m4sh.at (_AS@&t@_CLEAN_DIR): New test.
Reported by Ralf Wildenhues.
Eric Blake [Thu, 9 Apr 2009 16:29:33 +0000 (10:29 -0600)]
Fix regression in empty test.
* lib/autotest/general.m4 (AT_SETUP): Prep AT_ingroup for fallback
use in empty test. Fixes regression introduced 2009-04-06.
(_AT_CHECK): Undo fallback when a test is not empty.
(AT_CLEANUP): Expand AT_ingroup before deleting.
Eric Blake [Mon, 6 Apr 2009 18:13:02 +0000 (12:13 -0600)]
Handle shell comments in AT_CHECK.
* lib/autotest/general.m4 (_AT_DECIDE_TRACEABLE): Handle # in
test correctly. Latent bug in handling shell comment was first
fixed 2008-11-20, but regressed two patches later.
* tests/autotest.at (Shell comment in command): New test.
* NEWS: Document the fix.
Eric Blake [Mon, 6 Apr 2009 16:40:49 +0000 (10:40 -0600)]
Hard fail any test with syntax errors.
* lib/autotest/general.m4 (AT_INIT) <at_fn_group_postprocess>:
Guarantee test failure on syntax error, rather than inheriting
status from previous test.
* tests/autotest.at (Syntax error): New test.
Eric Blake [Mon, 30 Mar 2009 14:45:11 +0000 (08:45 -0600)]
Beta Release Version 2.63b.
* NEWS: Mention the release.
* README: Clarify that this is a beta release.
* build-aux/texinfo.tex: Synchronize from upstream.
* .x-sc_trailing_blank: Exempt more upstream files.
Eric Blake [Mon, 30 Mar 2009 14:11:09 +0000 (08:11 -0600)]
For now, skip parallel tests under less-tested shells.
* tests/autotest.at (AT_CHECK_AT): Add pre-test argument.
(Tested programs, Startup error messages, AT_CHECK_AT_TITLE)
(Fallacy, Skip, errexit, Long test source lines)
(Debugging a successful test, Debugging script and environment)
(Debugging a failed test, Using atlocal)
(Choosing where testsuite is run): Adjust callers.
(AT_SKIP_PARALLEL_TESTS): New macro, to skip parallel tests except
under zsh, bash, or when TEST_PARALLEL_AUTOTEST is defined. Makes
it easier to avoid testsuite hangs for users with dash or other
less-tested shell.
(parallel test execution, parallel truth, parallel fallacy)
(parallel skip, parallel errexit)
(parallel autotest and signal handling): Use it.
* BUGS: Mention this.
* lib/autoconf/status.m4 (_AC_OUTPUT_FILES_PREPARE): Fall back to
bash carriage returns if ac_cr lost \r from ``.
* THANKS: Update.
Suggested by Eric Blake.
Eric Blake [Thu, 19 Feb 2009 21:32:36 +0000 (14:32 -0700)]
Use m4_translit more efficiently in AS_ESCAPE.
* lib/m4sugar/m4sh.m4 (_AS_ESCAPE): Alter API to take first byte
of set separately from rest.
(AS_ESCAPE, _AS_QUOTE_MODERN, AS_TR_SH, AS_VAR_GET): Adjust
callers.
* lib/autoconf/autoheader.m4 (AH_VERBATIM): Avoid duplicate
characters in translit request.
* doc/autoconf.texi (Common Shell Constructs) <AS_ESCAPE>:
Document the macro.
* NEWS: Likewise.
* lib/m4sugar/m4sugar.m4 (_m4_stack_reverse): Alter API to avoid
creating larger argument on each iteration.
(m4_stack_foreach_sep, m4_stack_foreach_sep_lifo)
(_m4_set_contents_2): Adjust all four-argument callers.
Eric Blake [Tue, 3 Feb 2009 16:15:54 +0000 (09:15 -0700)]
Mention that packagers should not pre-set CFLAGS.
* doc/autoconf.texi (Preset Output Variables) <CFLAGS>: Copy
advice given by automake on handling variables reserved by GNU
Coding Standards.
Reported by Karl Berry.
Eric Blake [Tue, 3 Feb 2009 16:01:52 +0000 (09:01 -0700)]
Document lib64 in config.site.
* doc/autoconf.texi (Site Defaults): Fix typo in FHS sample file.
Mention use of lib64.
* THANKS: Update.
Reported by Tom Browder, with help from Peter Breitenlohner.
Eric Blake [Wed, 28 Jan 2009 16:11:28 +0000 (09:11 -0700)]
Use AC_DEFUN_ONCE for uncontroversial one-shot macros.
* lib/autoconf/headers.m4 (AC_HEADER_ASSERT): Switch to
AC_DEFUN_ONCE, since this is a one-shot macro.
* lib/autoconf/specific.m4 (AC_USE_SYSTEM_EXTENSIONS): Likewise.
* lib/autoconf/general.m4 (AC_CANONICAL_BUILD)
(AC_CANONICAL_HOST, AC_CANONICAL_TARGET): Likewise.
Eric Blake [Wed, 28 Jan 2009 23:14:13 +0000 (16:14 -0700)]
Reduce blank lines in AC_DEFUN_ONCE macros.
* lib/m4sugar/m4sugar.m4 (m4_defun_once): Avoid redundant blank
line when a defun_once macro is required.
(_m4_defun_once): New helper macro, for less memory use.
* tests/m4sugar.at (m4@&t@_require: nested): Adjust test.
Eric Blake [Wed, 28 Jan 2009 18:01:42 +0000 (11:01 -0700)]
Silence another false positive expand-before-require.
* lib/m4sugar/m4sugar.m4 (_m4_defun_pro_outer)
(_m4_defun_epi_outer, _m4_require_call, m4_provide): Track name
that caused a diversion change, not just diversion number.
(m4_require): Factor...
(_m4_require_check): ...into new macro, which also checks whether
diversion that performed the expansion has been collected.
* tests/m4sugar.at (m4@&t@_require: nested): Enhance test.
Reported by Ralf Wildenhues.
Eric Blake [Wed, 28 Jan 2009 16:57:08 +0000 (09:57 -0700)]
Fix AC_C_RESTRICT for Sun Studio 12 C++.
* lib/autoconf/c.m4 (AC_C_RESTRICT): Newer Sun Studio C provides
__restrict__ rather than _Restrict, which still trips up Sun
Studio 12 C++.
* THANKS: Update.
Reported by Rolf Vandevaart.
Eric Blake [Tue, 27 Jan 2009 23:13:55 +0000 (16:13 -0700)]
Fix years in copyright notices.
* lib/m4sugar/m4sugar.m4 (m4_copyright_condense): New macro,
undocumented for now.
* lib/m4sugar/Makefile.am (version.m4): Add m4_PACKAGE_YEAR,
m4_PACKAGE_URL.
(RELEASE_YEAR): New macro, copied from bin/Makefile.am.
* lib/autoconf/general.m4 (_AC_COPYRIGHT_YEARS): New macro.
(AC_COPYRIGHT): Add undocumented third parameter.
(_AC_INIT_COPYRIGHT): Avoid need to bump copyright years.
* lib/autoconf/status.m4 (_AC_OUTPUT_CONFIG_STATUS): Likewise.
* lib/autotest/general.m4 (AT_INIT): Likewise.
* lib/autoconf/autotest.m4 (AC_CONFIG_TESTDIR): Likewise.
(AT_COPYRIGHT): Add undocumented third parameter.
* tests/local.at (AT_COPYRIGHT): Don't add an extra copyright
parameter; the generic copyright given by autotest is sufficient
since we are the package that owns autotest.
Eric Blake [Tue, 27 Jan 2009 23:13:41 +0000 (16:13 -0700)]
Use URLs in --help output, part 3: testsuite.
* doc/autoconf.texi (Writing Testsuites): Mention autotest
namespace.
(Writing Testsuites) <AT_INIT>: Mention mandatory macros.
(Making testsuite Scripts): Document AT_PACKAGE_URL.
* tests/Makefile.am (package.m4): Follow our own advice.
* lib/autotest/general.m4 (AT_INIT): Give the user a hint about
package.m4. Enhance --help output.
(_AT_COPYRIGHT_YEARS): New macro, to make copyright bump easier.
Eric Blake [Mon, 26 Jan 2009 16:55:57 +0000 (09:55 -0700)]
Improve AC_DEFUN_ONCE semantics.
* lib/m4sugar/m4sugar.m4 (m4_defun_once): Rewrite to be no-op,
rather than warning, on second use, and make sure first use never
occurs out of order.
* tests/m4sugar.at (m4@&t@_require: one-shot initialization):
Enhance test.
* tests/base.at (AC_REQUIRE & AC_DEFUN_ONCE: [Require, expand],
(AC_REQUIRE & AC_DEFUN_ONCE: [Expand, require]): Adjust tests.
* NEWS: Document this.
* doc/autoconf.texi (Macro Definitions) <AC_DEFUN>: Mention
AC_DEFUN_ONCE.
(Prerequisite Macros) <AC_REQUIRE>: Likewise.
(Expanded Before Required): Likewise.
(One-Shot Macros) <AC_DEFUN_ONCE>: Document new semantics.
Reported by Bruno Haible, with suggestion by Paolo Bonzini.
Eric Blake [Sat, 24 Jan 2009 13:16:48 +0000 (06:16 -0700)]
Revert change to AC_DIR_HEADER.
* lib/autoconf/headers.m4 (AC_DIR_HEADER): Explicitly expanding
AC_HEADER_DIRENT no longer triggers a warning, and helps the user
who decides they don't need the obsolete AC_FUNC_CLOSEDIR_VOID.
Reported by Paolo Bonzini.
Eric Blake [Thu, 22 Jan 2009 15:08:06 +0000 (08:08 -0700)]
Silence a false positive expand-before-require case.
* lib/m4sugar/m4sugar.m4 (m4_provide): Track the diversion in
which a macro was provided.
(m4_require): Compare diversion numbers, rather than m4_require
nesting, when determining direct requires.
* tests/m4sugar.at (m4@&t@_require: nested): Test it.
Reported by Ralf Wildenhues, affecting Libtool.
Eric Blake [Tue, 20 Jan 2009 21:03:59 +0000 (14:03 -0700)]
Warn if macro is provided before indirectly required.
* lib/m4sugar/m4sugar.m4 (m4_provide): Track the set of all macros
provided since last outermost defun.
(_m4_defun_pro_outer): Empty the set.
(_m4_require_call): Distinguish between direct and indirect
requires, and remove required macros from the set.
(m4_require): Check the set, in order to warn.
* tests/m4sugar.at (m4@&t@_require: nested): Remove xfail, and add
test case for direct requires.
Eric Blake [Sat, 17 Jan 2009 16:36:02 +0000 (09:36 -0700)]
Improve AC_REQUIRE documentation.
* doc/autoconf.texi (Macro Definitions) <AC_DEFUN>: Add @defmac,
and mention interaction with AC_REQUIRE.
(Prerequisite Macros) <AC_REQUIRE>: Give more detail on user
ordering constraint bug, and how to fix it.
* tests/m4sugar.at (m4@&t@_require: nested): New test.
Eric Blake [Sat, 17 Jan 2009 15:38:11 +0000 (08:38 -0700)]
Speed up m4_require.
* lib/m4sugar/m4sugar.m4 (_m4_divert_dump): Change semantics to
always be defined, as either empty or a number.
(_m4_defun_pro_outer, _m4_defun_epi_outer): Treat _m4_divert_dump
as a stack, rather than a one-shot macro.
(_m4_require_call): Expect third argument to be pre-expanded.
(m4_divert_require, m4_require): Adjust clients accordingly.
* lib/m4sugar/m4sh.m4 (AS_REQUIRE): Likewise.
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