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

[Eric Blake]

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- Log -----------------------------------------------------------------
commit 5fdd360bcbeeff0fdb3214aad1866c2f9eace98d
Author: Nick Bowler <address@hidden>
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 <address@hidden>

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

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            address@hidden
 Nelson H. F. Beebe          address@hidden
 Nicolas Joly                address@hidden
 Nicolás Lichtmaier          address@hidden
-Nick Bowler                 address@hidden
+Nick Bowler                 address@hidden
 NightStrike                 address@hidden
 Nishio Futoshi              address@hidden
 Noah Elliott                address@hidden
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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