On RHEL 6.4 (using autoconf 2.63), './gnulib-tool --test math'
fails with the following, since commit 74540d44:
executing autoconf
configure:5693: error: possibly undefined macro: AS_VAR_COPY
If this token and others are legitimate, please use m4_pattern_allow.
See the Autoconf documentation.
Since we document that we support out-of-the-box use with autoconf
2.59 and later, the fix is to provide a fallback definition.
* m4/gnulib-common.m4 (AS_VAR_COPY): Define if missing.
Signed-off-by: Eric Blake <[email protected]>
---
ChangeLog | 5 +++++
m4/gnulib-common.m4 | 6 +++++-
2 files changed, 10 insertions(+), 1 deletion(-)
diff --git a/ChangeLog b/ChangeLog
index 4460528..805dc53 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2014-01-06 Eric Blake <[email protected]>
+
+ include_next: port to autoconf 2.63
+ * m4/gnulib-common.m4 (AS_VAR_COPY): Define if missing.
+
2014-01-04 Jim Meyering <[email protected]>
maint: add a gnulib-local rule to keep non-ascii out of .texi files
diff --git a/m4/gnulib-common.m4 b/m4/gnulib-common.m4
index ae31e80..3b61b23 100644
--- a/m4/gnulib-common.m4
+++ b/m4/gnulib-common.m4
@@ -1,4 +1,4 @@
-# gnulib-common.m4 serial 33
+# gnulib-common.m4 serial 34
dnl Copyright (C) 2007-2014 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
@@ -375,3 +375,7 @@ AC_DEFUN([gl_CACHE_VAL_SILENT],
AC_CACHE_VAL([$1], [$2])
as_echo_n="$saved_as_echo_n"
])
+
+# AS_VAR_COPY was added in autoconf 2.63b
+m4_define_default([AS_VAR_COPY],
+[AS_LITERAL_IF([$1[]$2], [$1=$$2], [eval $1=\$$2])])
--
1.8.4.2
