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| author | Zack Weinberg <zackw@panix.com> | 2020-03-13 14:50:50 -0400 |
|---|---|---|
| committer | Zack Weinberg <zackw@panix.com> | 2020-03-13 14:50:50 -0400 |
| commit | 8a09003664733eb6bef031f56ef9cd575e403023 (patch) | |
| tree | 4c56c2d4a963fcb7f37b0ccbbceefa8462ff82c8 /NEWS | |
| parent | b2e4b6333785aa55814bfd8f8747a9ce948fa88e (diff) | |
| download | autoconf-8a09003664733eb6bef031f56ef9cd575e403023.tar.gz | |
Define $as_echo and $as_echo_n for backward compatibility.
Commit 2b59b6f8a79b8bf77e178ff4e5aa0ede433d39cf removed the internal
shell variables $as_echo and $as_echo_n. It turns out that these are
used by several widely-used third-party m4 files (notably both
gnulib-common.m4 from gnulib, and ax_pthread.m4 from the Autoconf
macro archive) as well as any number of existing configure.ac’s.
Restore these shell variables, unconditionally defining them to use
printf. Issue -Wobsolete warnings if they are used, recommending the
use of AS_ECHO and AS_ECHO_N respectively. Add a test which checks
both that they do work and that they trigger warnings.
Diffstat (limited to 'NEWS')
| -rw-r--r-- | NEWS | 6 |
1 files changed, 5 insertions, 1 deletions
@@ -17,9 +17,13 @@ GNU Autoconf NEWS - User visible changes. by autoreconf. ** Use of printf is now recommended instead of working around bugs in - echo. Macros AS_ECHO and AS_ECHO_N now expand unconditionally to + echo. The macros AS_ECHO and AS_ECHO_N now expand unconditionally to 'printf "%s\n"' and 'printf %s'. +** Use of the undocumented internal shell variables $as_echo and + $as_echo_n now elicits a warning in the 'obsolete' category. + The macros AS_ECHO and AS_ECHO_N should be used instead. + ** AC_CHECK_HEADER and AC_CHECK_HEADERS now default to doing only a compilation test. This completes the transition from preprocessor- based header tests begun in Autoconf 2.56. |