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* doc/autoconf.texi (Limitations of Usual Tools) <expr>:

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expr 'a' : '(b)'.
From Paul Eggert.
This commit is contained in:
Akim Demaille 2000-11-16 16:30:39 +00:00
parent f4ab635fa6
commit eb6a72ebf4
3 changed files with 13 additions and 1 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2000-11-16 Akim Demaille <akim@epita.fr>
* doc/autoconf.texi (Limitations of Usual Tools) <expr>:
expr 'a' : '\(b\)'.
From Paul Eggert.
2000-11-16 Akim Demaille <akim@epita.fr>
Reorder the test suite so that low level features are tested

6
doc/autoconf.texi
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@ -5851,6 +5851,12 @@ Don't use @code{length}, @code{substr}, @code{match} and @code{index}.
Don't use @samp{\?}, @samp{\+} and @samp{\|} in patterns, they are
not supported on Solaris.
The @sc{posix}.2-1996 standard is ambiguous as to whether @samp{expr 'a'
: '\(b\)'} outputs @samp{0} or the empty string. In practice, it
outputs the empty string on most platforms, but portable scripts should
not assume this. For instance, the @sc{qnx} 4.2.5 native @command{expr}
returns @samp{0}.
Older @command{expr} implementations (e.g. SunOS 4 @command{expr} and
Solaris 8 @command{/usr/ucb/expr}) have a silly length limit that causes
@command{expr} to fail if the matched substring is longer than 120

2
tests/Makefile.in
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@ -66,7 +66,7 @@ standards_texi = @standards_texi@
AUTOMAKE_OPTIONS = gnits
SUITE = suite.at m4sugar.at m4sh.at base.at tools.at compile.at semantics.at torture.at syntax.at update.at
SUITE = suite.at m4sugar.at m4sh.at base.at tools.at torture.at compile.at semantics.at syntax.at update.at
# We don't actually distribute the testsuite, since one only