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The "#serial" lines are only considered by aclocal for the system-wide
third-party '.m4' files, not for the Automake-provided ones. So they
serve no real purpose in the Automake '.m4' files.
In addition, now that we use git and topic branches, and that we are also
writing the Automake-NG fork, the "#serial" lines are becoming more and
more unreliable (e.g., different version of the same file in different
branches can easily end up having the same serial numbers).
So let's just nuke all the "#serial" lines. See also automake bug#11932.
* m4/*.m4: All "# serial" lines removed.
Signed-off-by: Stefano Lattarini <stefano.lattarini@gmail.com>
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* m4/cond-if.m4 (AM_COND_IF): test contents of $COND_TRUE
variable, rather than re-evaluating the shell expression for
the condition.
* tests/cond40.test: Extend test.
* NEWS: Update.
Signed-off-by: Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
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* m4/cond-if.m4 (AM_COND_IF): Ensure IF-TRUE part is never empty
to avoid shell syntax error if the m4 expansion is empty.
* tests/cond40.test: Enhance test.
Signed-off-by: Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
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* automake.in (%ac_config_files_condition): New.
(scan_autoconf_config_files): Record condition if any.
(scan_autoconf_traces): Trace _AM_COND_IF, _AM_COND_ELSE,
_AM_COND_ENDIF, updating @cond_stack as appropriate.
(handle_configure): Prefix config.status rule with condition.
Check that m4 quotation is done consistently.
* m4/cond.m4 (AM_CONDITION): Define `_AM_COND_VALUE_name'
with `name' being the name of the condition, to its shell
condition.
* m4/cond-if.m4: New file.
(_AM_COND_IF, _AM_COND_ELSE, _AM_COND_ENDIF): New trace helpers.
(AM_COND_IF): New macro, implements conditionals.
* m4/Makefile.am: Adjust.
* doc/automake.texi (Requirements, Optional, Conditionals):
Document AM_COND_IF.
* NEWS: Update.
* tests/cond39.test, tests/cond40.test, tests/cond41.test,
tests/cond42.test, tests/cond43.test: New tests.
* tests/Makefile.am: Adjust.
Signed-off-by: Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
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