[SCM] GNU Autoconf source repository branch, master, updated. v2.63-10-gb2bde72

[Eric Blake]

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- Log -----------------------------------------------------------------
commit b2bde72f548d74e76a7dced0a3aeb58fe91de5b8
Author: Eric Blake <address@hidden>
Date:   Thu Oct 2 09:02:37 2008 -0600

    Document more binary file portability traps.
    
    * doc/autoconf.texi (Limitations of Usual Tools) <sed>: Remind
    reader that NUL and sed don't always mix.
    <tr>: Mention Solaris /usr/ucb/tr bug with \0.
    
    Signed-off-by: Eric Blake <address@hidden>

commit 9229dcb1044566b16ef901b208db63405095a835
Author: Eric Blake <address@hidden>
Date:   Thu Oct 2 08:59:37 2008 -0600

    ChangeLog for previous commit.
    
    Signed-off-by: Eric Blake <address@hidden>

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog         |   24 ++++++++++++++++++++++++
 doc/autoconf.texi |   17 ++++++++++++++++-
 2 files changed, 40 insertions(+), 1 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index c277148..dbba2f8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,27 @@
+2008-10-02  Eric Blake  <address@hidden>
+
+       Document more binary file portability traps.
+       * doc/autoconf.texi (Limitations of Usual Tools) <sed>: Remind
+       reader that NUL and sed don't always mix.
+       <tr>: Mention Solaris /usr/ucb/tr bug with \0.
+
+2008-10-02  Ralf Wildenhues  <address@hidden>
+
+       Implement parallel Autotest test execution: testsuite --jobs.
+       * lib/autotest/general.m4 (AT_JOB_FIFO_FD): New macro.
+       (AT_INIT): <at_jobs>: New variable.
+       Accept -j, -jN, --jobs[=N], document them in --help output.
+       Implement parallel driver loop using a FIFO, enabled with --jobs
+       and if mkfifo works; otherwise, fall back to sequential loop.
+       (AT_SETUP): Store, do not output summary progress line if
+       parallel.
+       * tests/autotest.at (parallel test execution, parallel truth)
+       (parallel fallacy, parallel skip): New tests.
+       * doc/autoconf.texi (testsuite Invocation): Document -j, --jobs,
+       the mkfifo requirement, and that --errexit may cause concurrent
+       jobs to finish.
+       * NEWS: Update.
+
 2008-09-20  Eric Blake  <address@hidden>
 
        Fix sample isinf definition.
diff --git a/doc/autoconf.texi b/doc/autoconf.texi
index e515a87..939eaea 100644
--- a/doc/autoconf.texi
+++ b/doc/autoconf.texi
@@ -15849,7 +15849,9 @@ sed: 1: "s/x/x/;;s/x/x/": invalid command code ;
 @end example
 
 Input should not have unreasonably long lines, since some @command{sed}
-implementations have an input buffer limited to 4000 bytes.
+implementations have an input buffer limited to 4000 bytes.  Likewise,
+not all @command{sed} implementations can handle embedded @code{NUL} or
+a missing trailing newline.
 
 Portable @command{sed} regular expressions should use @samp{\} only to escape
 characters in the string @samp{$()address@hidden@}}.  For example,
@@ -16101,6 +16103,19 @@ $ @address@hidden echo moon; echo light; @} | 
/usr/ucb/tr -d '\012' ; echo}
 moonlight
 @end example
 
+Posix requires @command{tr} to operate on binary files.  But at least
+Solaris @command{/usr/ucb/tr} still fails to handle @samp{\0} as the
+octal escape for @code{NUL}.  On Solaris, when using @command{tr} to
+neutralize a binary file by converting @code{NUL} to a different
+character, it is necessary to use @command{/usr/xpg4/bin/tr} instead.
+
address@hidden
+$ @kbd{printf 'a\0b\n' | /usr/ucb/tr '\0' '~' | wc -c}
+3
+$ @kbd{printf 'a\0b\n' | /usr/xpg4/bin/tr '\0' '~' | wc -c}
+4
address@hidden example
+
 @end table
 
 


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