* doc/autoconf.texi (C Compiler): Document this. There is a new
extra argument ACTION-IF-UNIVERSAL.
* lib/autoconf/c.m4 (AC_C_BIGENDIAN): Implement this.
Add support for Solaris-style _LITTLE_ENDIAN and _BIG_ENDIAN.
Reindent for sanity's sake.
status of rm so we know when it failed.
If cleaning of test dir failed before running the test, warn.
Output the line separator in verbose mode before the warning
to make clear the warning belongs to the following test.
an actual carriage return. Use "ac_cr" to contain the actual
carriage return.
* doc/autoconf.texi (Limitations of Usual Tools): Document problem
with traditional Awk and begin.
* tests/torture.at (Limitations of Builtins): Document the problem
with Bash 2.03 printf.
(Substitute and define special characters):
Remove trailing white space. Work around a bug in Solaris 8 /bin/bash.
AC_SUBST([MKDIR_P]), so that Automake < 1.10 will pick up its
trace, if a package uses AC_PROG_MKDIR_P explicitly. The actual
substitution will still be done by the special code.
Report by Jim Meyering.
all non-NUL characters are ok in substituted values.
* lib/autoconf/status.m4 (_AC_SED_CMD_LIMIT): Fix comment typo.
(_AC_OUTPUT_FILES_PREPARE): Test and use backslash escaping of
carriage return for $AWK, needed for BSD awk.
* tests/torture.at (Substitute and define special characters):
Test all 8 bit non-NUL characters.
Report against Automake by Patrick Welche.
early on the reader side, drop stderr of the input to avoid
`broken pipe' error output; this may happen even with shell
builtin `echo' of some bash versions. Reports by Ian Macdonald
<iamacdo@telkomsa.net> and Sam Sexton <Sam.Sexton@reuters.com>.
http://lists.gnu.org/archive/html/autoconf-patches/2007-01/msg00077.html
* doc/autoconf.texi (Signed Overflow Examples): Give more
discussion about the allow_superuser_privileges example,
and change it a bit to make things clearer.
(Optimization and Wraparound): Clarify whether the compiler
will generate an infinite loop for the example derived from
Autoconf's mktime test.
(Signed Overflow Advice): Say that -ftrapv is meant for debugging.
Also, clarify unsigned multiplication overflow.
feedback. The most important changes document what happens when
you convert an out-of-range value to a signed integer type, and
say that (sum < a) != (b < 0) reliably detects overflow when sum =
a + b.
rewrite, taking notions from the recent discussion on the gcc and
autoconf mailing lists; please see
http://lists.gnu.org/archive/html/autoconf-patches/2006-12/msg00091.html
and follow the many links.
(Integer Overflow Basics, Signed Overflow Examples):
(Optimization and Wraparound, Signed Overflow Advice):
(Signed Integer Division): New sections.
SCALAR(0x828309c)
Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007 Free
Software Foundation, Inc.
preprocessor macro arguments in traced name.
* doc/autoconf.texi (Defining symbols): Document longstanding
support for AC_DEFINE-ing macros with arguments, and document
behavior when the same variable has multiple AC_DEFINEs.
* lib/autoconf/fortran.m4 (_AC_FC_WRAPPERS): Revert to the
old implementation which AC_DEFINEs the FC_FUNC and FC_FUNC_
macros directly, giving much shorter and simpler code.
space before "$ac_configure_args" to prevent a 'config.status
--recheck' failure if ac_configure_args doesn't contain a leading
space. This works around a problem with the XEmacs configure.ac,
which uses the (undocumented) ac_configure_args variable
inconsistently with Autoconf.
Include <limits.h>, and use its INT_MAX to rewrite the
j loop so that it does not overflow 'int'. Problem reported by
Ralf Wildenhues in
<http://lists.gnu.org/archive/html/bug-gnulib/2006-12/msg00084.html>.
Play it safe by shifting left by 1 rather than multiplying by 2,
as GCC is less likely to optimize this away when the value
is signed (when it assumes overflow leads to undefined behavior).
Also, don't assume time_t uses two's complement.
--disable-option-checking to --help output even when
AC_PRESERVE_HELP_ORDER is not used.
(_AC_INIT_PARSE_ENABLE2): Print warnings using actual --enable or
--with argument, rather than argument with [-.] replaced by
underscores.
* NEWS: Fix typo in previous change; the news was in the
wrong section.
--enable-* and --with-* options.
* doc/autoconf.texi (Option Checking): Renamed from
(Configure Option Checking). Tighten up the wording a bit.
(External Software, Package Options): Cross-reference to Option
Checking, and use this to shorten our section.
* lib/autoconf/general.m4 (_AC_INIT_PARSE_ARGS): Prefer test -n
"$x" to test "x$foo" != x.
* lib/autoconf/status.m4 (AC_OUTPUT): Likewise.
Don't warn if $enable_option_checking is "no".
* lib/autoconf/general.m4 (_AC_INIT_PARSE_ARGS): Initialize
ac_unrecognized_opts to the empty string.
Don't echo the unrecognized opts, as this might mishandle
backslashes or leading -.
(AC_PRESERVE_HELP_ORDER): Put the --disable-option-checking
usage next to the other --disable-FEATURE options in the
help string.
2006-12-18 Steven G. Johnson <stevenj@alum.mit.edu>
* lib/autoconf/general.m4 (_AC_INIT_DEFAULTS, _AC_INIT_PARSE_ARGS):
(_AC_INIT_PARSE_ENABLE2, _AC_INIT_HELP, _AC_ENABLE_IF):
Print warning for unrecognized --with and --enable options
(AC_DISABLE_OPTION_CHECKING): New macro to disable warnings.
* lib/autoconf/status.m4 (AC_CONFIG_SUBDIRS, _AC_OUTPUT_SUBDIRS):
Disable option checking when subdirs are configured.
(AC_OUTPUT): If warnings are enabled, print warning about
unrecognized --with and --enable options at the end of
the configure output (as well as at the beginning).
* doc/autoconf.texi (Option Checking): New node.
Document new option warning functionality.
<http://lists.gnu.org/archive/html/bug-autoconf/2006-12/msg00026.html>.
* doc/autoconf.texi (Defining Symbols): AC_DEFINE works for
object-like macros only, in the traditional portable character
set.
* lib/autoconf/general.m4 (AC_DEFINE_TRACE_LITERAL):
Warn about attempts to define things that are not identifiers.
* lib/autoconf/fortran.m4 (_AC_FC_WRAPPERS): Rewrite to avoid
awful hack that AC_DEFINEd macro names containing parentheses.
too drastic, even if Texinfo in theory requires it for info mode.
(config.status Invocation): Renamed back from Recreating a
Configuration).
(Obsolete config.status Use): Renamed back from Obsolete Recreation.
(Autoconf 2.13): Renamed back from 20th-century Autoconf 2.
