[SCM] GNU Autoconf source repository branch, master, updated. v2.69-18-g5fdd360

[Eric Blake]

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- Log -----------------------------------------------------------------
commit 5fdd360bcbeeff0fdb3214aad1866c2f9eace98d
Author: Nick Bowler <***@draconx.ca>
Date: Wed Aug 15 21:54:53 2012 -0600

AC_SUBST: don't underquote the variable name

Consider the following:

% cat >configure.ac <<'EOF'
AC_INIT([test], [0])

m4_define([FOO], [baz])
AC_SUBST([FOO], [bar])

AC_CONFIG_FILES([test])
AC_OUTPUT
EOF

% cat >test.in <<'EOF'
@FOO@
EOF

This produces no error messages at autoconf time and none at configure
time. Nevertheless, the substituted value of FOO is the empty string,
instead of bar, as expected. Sure enough, in the output variables
section of config.log, we see FOO='' instead of FOO='bar'. Looking
at the generated configure script, we see that AC_SUBST has produced
baz=bar in the output, instead of the expected FOO=bar. But this is
the only place: everywhere else is still using FOO.

* lib/autoconf/general.m4 (AC_SUBST): Add another layer of
quoting.
* THANKS: Update.

Signed-off-by: Eric Blake <***@redhat.com>

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

Summary of changes:
THANKS | 2 +-
lib/autoconf/general.m4 | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/THANKS b/THANKS
index d90237d..be83c28 100644
--- a/THANKS
+++ b/THANKS
@@ -302,7 +302,7 @@ Nathanael Nerode ***@gcc.gnu.org
Nelson H. F. Beebe ***@math.utah.edu
Nicolas Joly ***@pasteur.fr
Nicolás Lichtmaier ***@synapsis-sa.com.ar
-Nick Bowler ***@elliptictech.com
+Nick Bowler ***@draconx.ca
NightStrike ***@gmail.com
Nishio Futoshi ***@d3.dion.ne.jp
Noah Elliott ***@hera.llnl.gov
diff --git a/lib/autoconf/general.m4 b/lib/autoconf/general.m4
index d06fdf5..51cee30 100644
--- a/lib/autoconf/general.m4
+++ b/lib/autoconf/general.m4
@@ -2180,7 +2180,7 @@ m4_define([AC_SUBST],
[m4_fatal([$0: `$1' is not a valid shell variable name])])]dnl
[AC_SUBST_TRACE([$1])]dnl
[m4_pattern_allow([^$1$])]dnl
-[m4_ifvaln([$2], [$1=$2])[]]dnl
+[m4_ifvaln([$2], [[$1]=$2])[]]dnl
[m4_set_add([_AC_SUBST_VARS], [$1])])# AC_SUBST




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