[SCM] GNU Autoconf source repository branch, master, updated. v2.63-124-gb83aa7e

[Ralf Wildenhues]

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- Log -----------------------------------------------------------------
commit b83aa7ee0d5fcaaeb3e617eb87c97ab2ba182224
Author: Ralf Wildenhues <address@hidden>
Date:   Tue Oct 28 22:04:36 2008 +0100

    Fix parallel test execution output lossage.
    
    * lib/autotest/general.m4 (_AT_CHECK): Truncate files to hold
    standard output and standard error before the test, use append
    mode for writing.
    * THANKS: Update.
    Caught by Bob Proulx' build daemons, analysis and suggested fix
    by Stéphane Chazelas.
    
    Signed-off-by: Ralf Wildenhues <address@hidden>

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

Summary of changes:
 ChangeLog               |   16 +++++++++++++---
 THANKS                  |    1 +
 lib/autotest/general.m4 |   10 ++++++++--
 3 files changed, 22 insertions(+), 5 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 0451fa9..b5d860f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,13 @@
+2008-10-28  Ralf Wildenhues  <address@hidden>
+
+       Fix parallel test execution output lossage.
+       * lib/autotest/general.m4 (_AT_CHECK): Truncate files to hold
+       standard output and standard error before the test, use append
+       mode for writing.
+       * THANKS: Update.
+       Caught by Bob Proulx' build daemons, analysis and suggested fix
+       by Stéphane Chazelas.
+
 2008-10-28  Eric Blake  <address@hidden>
 
        Use m4_map_args in more places.
@@ -1277,7 +1287,7 @@
        * lib/autoconf/status.m4 (_AC_OUTPUT_CONFIG_STATUS): Flatten
        whitespace in $ac_config_files and $ac_config_headers.
        * tests/torture.at (Parameterized AC_CONFIG_FILES): New test.
-       Report by Andreas Schwab and Per Øyvind Karlsen.
+       Report by Andreas Schwab and Per Øyvind Karlsen.
        * THANKS: Update.
 
 2008-07-30  Eric Blake  <address@hidden>
@@ -1949,7 +1959,7 @@
        verbose compiler output, skip lines that set variables; gfortran
        4.3 sets LIBRARY_PATH, COMPILER_PATH, COLLECT_GCC_OPTIONS.
        * THANKS: Update.
-       Report by Vincent Lefèvre.
+       Report by Vincent Lefèvre.
 
 2008-03-21  Eric Blake  <address@hidden>
 
@@ -3547,7 +3557,7 @@
        the change.
        * NEWS: Likewise.
        * THANKS: Update.
-       Reported by Björn Lindqvist.
+       Reported by Björn Lindqvist.
 
        Provide better short-circuiting operation.
        * lib/m4sugar/m4sugar.m4 (m4_cond, m4_newline): New macros.
diff --git a/THANKS b/THANKS
index f566006..a9b65ce 100644
--- a/THANKS
+++ b/THANKS
@@ -319,6 +319,7 @@ Slava Sysoltsev             address@hidden
 Stefan Seefeld              address@hidden
 Stefan `Sec' Zehl           ?
 Stepan Kasal                address@hidden
+Stéphane Chazelas           address@hidden
 Stephen Gildea              address@hidden
 Stephen Rasku               address@hidden
 Steve Chamberlain           address@hidden
diff --git a/lib/autotest/general.m4 b/lib/autotest/general.m4
index 4d7c0f5..03d3902 100644
--- a/lib/autotest/general.m4
+++ b/lib/autotest/general.m4
@@ -1893,16 +1893,22 @@ m4_define([AT_DIFF_STDOUT()],
 #
 #  ( $at_traceon; $1 ) >at-stdout 2>at-stder1
 #
+# Note that we truncate and append to the output files, to avoid losing
+# output from multiple concurrent processes, e.g., an inner testsuite
+# with parallel jobs.
 m4_define([_AT_CHECK],
 [{ $at_traceoff
 AS_ECHO(["$at_srcdir/AT_LINE: AS_ESCAPE([$1])"])
 echo AT_LINE >"$at_check_line_file"
 
+: >"$at_stdout"
 if _AT_DECIDE_TRACEABLE([$1]); then
-  ( $at_traceon; $1 ) >"$at_stdout" 2>"$at_stder1"
+  : >"$at_stder1"
+  ( $at_traceon; $1 ) >>"$at_stdout" 2>>"$at_stder1"
   at_func_filter_trace $?
 else
-  ( :; $1 ) >"$at_stdout" 2>"$at_stderr"
+  : >"$at_stderr"
+  ( :; $1 ) >>"$at_stdout" 2>>"$at_stderr"
 fi
 at_status=$?
 at_failed=false


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