# HG changeset patch
# User jwe
# Date 1046857758 0
# Node ID ad851d04b3966d7fa34b56137f684989a328780b
# Parent  4dfce8f9ee98edb8002c6350f173e98d491dd01e
[project @ 2003-03-05 09:49:18 by jwe]

diff --git a/ChangeLog b/ChangeLog
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2003-03-05  Paul Kienzle <pkienzle@users.sf.net>
+
+	* aclocal.m4 (OCTAVE_DYNAMIC_AUTO_ARRAYS): New macro.
+	* configure.in: Use it.
+	(AH_BOTTOM): Check HAVE_DYNAMIC_AUTO_ARRAYS instead of __GNUG__.
+
 2003-03-03  John W. Eaton  <jwe@bevo.che.wisc.edu>
 
 	* configure.in: Undo previous change.
diff --git a/aclocal.m4 b/aclocal.m4
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -102,6 +102,21 @@
 AC_LANG_POP(C++)
 ])
 dnl
+dnl See if the compiler dynamic auto arrays
+dnl
+AC_DEFUN(OCTAVE_DYNAMIC_AUTO_ARRAYS,
+[AC_CACHE_CHECK([whether C++ supports dynamic auto arrays],
+octave_cv_dynamic_auto_arrays,
+[AC_LANG_PUSH(C++)
+AC_TRY_COMPILE(,
+[void test(char *); int length(); char x[length()]; test(x);],
+octave_cv_dynamic_auto_arrays=yes, octave_cv_dynamic_auto_arrays=no)])
+if test $octave_cv_dynamic_auto_arrays = yes; then
+AC_DEFINE(HAVE_DYNAMIC_AUTO_ARRAYS,1,[Define if C++ supports dynamic auto arrays])
+fi
+AC_LANG_POP(C++)
+])
+dnl
 dnl The following test is from Karl Berry's Kpathseach library.  I'm
 dnl including it here in case we someday want to make the use of
 dnl kpathsea optional.
diff --git a/configure.in b/configure.in
--- a/configure.in
+++ b/configure.in
@@ -22,7 +22,7 @@
 ### 02111-1307, USA. 
 
 AC_INIT
-AC_REVISION($Revision: 1.420 $)
+AC_REVISION($Revision: 1.421 $)
 AC_PREREQ(2.52)
 AC_CONFIG_SRCDIR([src/octave.cc])
 AC_CONFIG_HEADER(config.h)
@@ -867,6 +867,10 @@
 
 OCTAVE_PLACEMENT_DELETE
 
+### See if we can auto allocate variable sized arrays.
+
+OCTAVE_DYNAMIC_AUTO_ARRAYS
+
 ### Checks for header files.
 
 AC_HEADER_STDC
@@ -1388,7 +1392,7 @@
 #define OCTAVE_HAVE_SIG_JUMP
 #endif
 
-#if defined (__GNUG__)
+#if defined (HAVE_DYNAMIC_AUTO_ARRAYS)
 #define OCTAVE_LOCAL_BUFFER(T, buf, size) \
   T buf[size]
 #else