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3b8f293ec2
Fix some subtle quotation bugs in _AC_INIT_PACKAGE that made it impossible to put ‘,’ or an unbalanced close parenthesis in some of the arguments to AC_INIT. Document that arguments to AC_INIT containing parentheses, square brackets, ‘,’ or ‘#’ may need to be double-quoted. Provide more detailed examples and exposition re computing the arguments to AC_INIT when autoconf is run (e.g. with git-version-gen). Add a whole bunch more tests for unusual arguments to AC_INIT, and a test that the backward-compatibility behavior of AC_INIT with only one argument is still correct. This may still break some of the existing configure scripts described in the threads at https://lists.gnu.org/r/autoconf/2020-10/msg00013.html and https://lists.gnu.org/r/bug-autoconf/2020-10/msg00012.html but, I hope, only in ways covered by the existing warning in NEWS about pickier M4 quotation. * lib/autoconf/general.m4 (_AC_INIT_PACKAGE): Redo argument normalization and default value selection in a simpler, less error-prone fashion. (_AC_INIT_PACKAGE_N): New helper subroutine. (AC_INIT): Always call _AC_INIT_PACKAGE, but supply no arguments if we were called with only one argument. * tests/base.at (AC_INIT (obsolete invocation)): New test. (AC_INIT with unusual version strings): Expand test. * doc/autoconf.texi (AC_INIT): Revise. |
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